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PS
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Full Citation
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Permanent Link: http://ufdc.ufl.edu/UF00076787/00006
 Material Information
Title: PS
Series Title: <Mar. 1987-> TB
Uniform Title: PS (United States. Dept. of the Army)
Alternate title: Preventive maintenance monthly
Alternate Title: PS, the preventive maintenance monthly
Caption title: PS magazine
Abbreviated Title: PS (Wash. D. C.)
Physical Description: v. : ill. ; 18 cm.
Language: English
Creator: Eisner, Will
United States -- Dept. of the Army
Penny and Sol Davidson Collection
Publisher: Dept. of the Army
Supt. of Docs., U.S. G.P.O., distributor
Place of Publication: Lexington Ky
Washington D.C
Creation Date: 1956
Frequency: monthly
regular
 Subjects
Subjects / Keywords: Military supplies -- Maintenance and repair -- Periodicals   ( lcsh )
Genre: federal government publication   ( marcgt )
periodical   ( marcgt )
serial   ( sobekcm )
 Notes
Summary: The Preventive Maintenance Monthly is an official publication of the Army, providing information for all soldiers assigned to combat and combat duties. The magazine covers issues concerning maintenance, maintenance procedures and supply problems.
Summary: From 1951 until 1971, Will Eisner illustrated and co-wrote PS. Self-descriptive in purpose, featured a mix of illustrated articles, diagrams, and comics.
Additional Physical Form: Vols. for Dec. 1990-1991 distributed to depository libraries in microfiche.
General Note: No. 61-<74> are photocopies (positive) copyrighted by Will Eisner Productions.
General Note: Imprint varies: Lexington, Ky., <Aug. 1978>-19 ; Redstone Arsenal, AL, <Sept. 1997->
General Note: Not distributed to depository libraries in a physical form, Dec. 2000-
General Note: Description based on: Issue 309 (Aug. 1978); title from cover.
General Note: Sol Davidson Collection holds issues 36, 40, 44, 49, 85-6, 89, 108, 112, 142, 148-57, 164-71, 173-4, 177, 182-4, 186-96, 198-209.
 Record Information
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: aleph - 001362266
oclc - 04507968
notis - AGM3698
lccn - 61040228
issn - 0475-2953
System ID: UF00076787:00006

Table of Contents
    Front Cover
        Front Cover
    Main
        Page 1
        Page 2-3
        Page 4-5
        Page 6-7
        Page 8-9
        Page 10-11
        Page 12
        Page 13
        Page 14
        Page 15
        Page 16-17
        Page 18
        Page 19
        Page 20
        Page 21
        Page 22
        Page 23
        Page 24-5
        Page 26
        Page 27
        Page 28
        Page 29
        Page 30
        Page 31
        Page 32
        Page 33
        Page 34
        Page 35
        Page 36
        Page 37
        Page 38
        Page 39
        Page 40-1
        Page 42
        Page 43
        Page 44
        Page 45
        Page 46
        Page 47
        Page 48
        Page 49
    Back Cover
        Page 50
Full Text



9I6.sue iTH


PR NIV








ANTNA
MP 0 N KY




II



No Swe Getting 'Em Now...

"Ho, in the ."- do I ger thad TM I need?" ,
Thai's one .if 'lhc b qucstion- l als as ikd b% opeca i rs and mechanics who
want to do.[rK -maintenann c jobs but don't know Ib r,, gri the pubihcarion
they na~edBut no"n our troubles arc over. The army has come up n ih a new
mcthod t''c gitiini those much-needed publications to )ou-the man % ho real
,eni ind uSie e- i n addition to TM's, this new mnethod ll gci sou Suppl
'ls, Lubrication Orders, Technical Bulletins, Supply Bullciin- and Modi-
ion Work Orders.
How does it work; Dran" ioursclr.a frosty one. hase a preizcl. and lend an
ear. You now get your publicatifiibu-cr like you ger )our palrt. cYp. that' right
-same channels as you dio ,or parts. Thi mnians if vou 'r hurrin' for an Ord.
nance publication, you order J' thru iour Ordnance Propcrt) O(itcer. It it's for
Enginctr equipment t~hai~- Itre morning publication. order thru sour Enginter
Properr) Ofticer. A0 ri hr .,n do, n yhL line \ith the othtr rcchnical scr. crc
Technical se v A 'stallation prop-
errt oiicers (il iaYl 'cm TSTPO'sr art .-
rcponsiblc' ftl -.
]y4-crdmat.c distribution of
TM s, SM s, LO s, TB's, SB's, and
MWO's to the using unit (that's you.)
2. Automatic distribution of ,-:.. y o
any new or revised publications. ''i
3. Replacing all maintenancepub- / *\
licat;ons you' e worn out or losi. '
41. Making iure you hoae the
right knd and right amount of pub-
licarions on hand to take care of
your equipment l;ke you should
If you'ree os\rscas .\)ger iour publications the arnc nai
'Tour TSIPO is A- important guy. He not onl) can tell uu % hat pub
licaiions are ava in your area, but he also knows just hat publicniions ,
you canput on .and what new publickaio:ns h:aie rolled ori the prcs s
and what ol Ications have been revised.
Of cgkr ou still requisition publication on DA Form I'. ',
Hr-.(y zat you can quote in case you run across one at thos has.sF "
g 'eticrr from Department of the Arnis Office of [li Adlu[-at'c\aeneral.
ington 25, D. C., dated 2 Dic 5, file AGAM-P NI i~ r t 'No% i 5i
G, SUBJECT: DisrributioLn ,t Suppl,, and Maintenanci Pue Eiion5.


qi

r


v
i.
:-<




ds


rs H


r1w1


1956 Senes


issue No. 49


Published by the Department of the Army for the information ot
organizational maintenance and supply personnel. Distribution
is made Ihrough normal publication channels. Within limitations
of availability, older issues may be obtained dire I from Preven
live Maintenance Agency. Raritan Arsenal, Meluchen, New Jersey

IN THIS ISSUE
FEATURE ARTICLES
Keeping those Vehicles in Tune .. 2
Maintenance of Fan Belts. . 16
Battery Care ICartoon Section) . 21
Testing Your .30-cal M37 Machine Gun 35
Clark Model 45 Planeloader .36
Cure for Sticky Gas Pedals 45


DEPARTMENTS
Connie Rodd .. .... 13
Half-Mast. .......... 29
Armament . 32
Quartermaster .. 36
Chemical ... .38
Engineers . .. .40
Contributions. ...... .. 44
Connie Rodd's Briefs 47
Perpetual Index .. . 48
PS wants your ideas and contributions, and is glad to answer
your questions Just write to: Sgt Half-Mast. PS, Raritan Arsenal,
Metuchen, N. J. Names and addresses are kept in confidence
RT pria ngi i1 til Pibliiu oai. ben s ma Ipror ue iArect r at Bilr If
il di Ll II1 A iiy S TeLTRIBIh CO i A I RM I im t la Dlt i1 Iiclpl
DLuPE 71. S 0 IS IrI SC DIA I1i Un l [U IiS 151ioi nefl I 17il imai
I lIo SIc L 151 H CODhAiC (1ii. I05 *i ml ri ; I S Bas Ciome l lili
iml| 15OI C iil O l I DilV ii uMc l ay J d IIl D I I ll ir. 1i3 1 1 1 e p blIl re Ii
Ci 1il I i T eLl C i C l ii Mi II M Ci ii I i i g It Lii Br Sc L ih I
ouenp LiF' .o ilm0 Ora SEo I. IS L 1i' u l5 p Lm nii l i'.
pISI ll IuCplt PhTl Ord RTlC UlIts li Lu. ai io l Si 151 51o Gin B laUp
1I. Dipoi it ALH 151 US em1 Toii Cell Po I POa ISI nri riif Tei oiln Comi iiL
Irm| Infll;ll (3, UO si l A cIIe 11 i IFl'. IPG iuimi Dli bL 15l (rCI MlI
Stll 1 O Lap I 1 Disi laJl Ig hi SAI5 Li AG Cll lil. USA i l M Dili
siocill Lst Fur UleIUD I a vlUf llIio i u Is lit SIR J1StI 1














PARD'M ME MA'AM... .
I WAS TOLD THAT IE
WOULD MEET A (fPL)...
LADY HERE THAT IOULD
HELP ME CURE THE
P T.HAT .. ON ME -<
I'AA A 'GEE
ECEL ON MECHANIC


k-i


13r jfornuila on Compression


First off, after ift-
ing the hood. take
out the spark plugs
and lay them aside
on a clean surface.


^^^rif~

ry
sa~s '^sssss~~~~~~~sssss


Then take compression
gage (Ord Stock No. il-G.
124) from \our second eche-
lon tool kit and go from
c linder to c) inder check-
ing compression. Mean while
sour buddy's cranking the
engine (.ar least four com-
plete revolutions) until you
get j reading on the gage
meter.


During test, throttle and
choke should be opened all
the waas choke knob on dash
pushed all the wa) in.l and
the engine should be at nor-
mal operating temperature.


CHOKE


Brtwart: Good batteries are needed since a true test depends on engine crank-
ing speed. To make sure of an accurate reading recheck first cylinder after
checking the others.
I oKiv I O Ai OAIK

If this cylinder checks loaer than the first time. the batteries have weak-
ened. The readings then for the other cylinders were probably lower than
what these really) are because of low cranking speed. If that's the way she
shows up. check her again, this rime with fully charged batteries.
P e Mfstic jRabings on Compression Chart
VEHICLE SERIES 0740 G758 0741 G742 G749 0744
MINIMUM ALLOWABLE
COMPRESSION IPSII 70 100 90 85 98 98
MAXIMUM PRESSURE
VARIATION FROM HIGH
TO LOW CYLINDER IPSI) 10 10 10 10 30-40 10
It _


ag-


aJ


- s-~ ttr- -----


~sj7(


..-- z


-I 'iF~








ONE (MUT BE CAREFUL AHE,..h ves I SEE.. ,lNLY
WITH THESE INTRICATE, IMM Wtr OPYe 'A' t Jry. ,." OL(, IViTC- ..AST A CURE L
.ECI-HANISIMS, FAULTY ,- A PEESONLAL.... A c
-EQUIPMENr NI-LH CAL)SE UARTAILMENT?
45E Ar'ACHE -%NvHEAR 4CHHE Al L. W.
... EE PRIEPARED AT ALL TIMES n
REZPIRS 7TAT 5Iia par
THE SMOOTH OPERTIOr P
OF C-UR VEHICLEE
____c Iit 11 time to return now to the spark plugs \ou l,,id aside. First
.L I .Fe AiITern. bcr'een the high and low c lenders Is look dovsn nhe cop of the plug io be sure the porcelain isn't cracked
Swihhin the maximum pressure 'ariaiion spec. you're OK. But If it is. get a nev plug.
Kf reading outside the limits, .our truck'sdue for somniengine Turn the plug to the electrode si
i::'ork IL J -. The insulatorrhere v ill tell ,ou herc


de
er


To find our whether c's .our rings or
'ales that are rloozing, make the c[t test.
, Drop a teaspoon of engine oil inro the c I-
4 inder.Oil seils off an\ leak around the rings


. II compression comes up. \ou knows the
trouble's srh your rings.



-If the compression doesn't come up, t s


'%)our 'ales.



\Talbr Cfjrfakmg
Chck our %alse, and make sure the 're adjusted lust right
'alves set a ih nor enough clearance hac a good chance of burn-
ing. wshilt sales set v ith too much clearance raise a racket and
take aw a. from the po\icr of the vehicle.
Pr ft'rIstlt Julitbrrs Jfor V 'lur lchbking
VEHICLE SERIES 740 G?58 G741 742 G7149 G744
INTAKE 016. !1 010 014 l06 .012 020
EXHAUST 016 .016 Ol .014 01 020 024
S -'
., ",'; _TT~~~


S


'- our plugs are operating itchin the
normal hear range, running too hot or
,. :., 1 )o ,cold.
ai[ [ngT lib
Jtormi T m1tat tJan1A itls

1 lIIL i ih HEAvYeGRAYISH TAN-
IAN OR BROWN-OK USED LONGER TIME
- -h -- -


fl1


4


GRAYISH TAN-USED I
FOR SHORT TIME-Oh I


DULL RUST BROWN-
READY FOR CHANCE


WiWlhltr? Too .tot caused hb

1. Plugs not Light enough in cylinder
head. or a distorted gasket
in ,alIe
2. Vales not seated properly
3. Air-fuel mixture too lean
4. Ignition timing out of commission
5. \\ rng heat range plug-, check
SNLI
6. \ after leaking into combustion
chamber


.3..'





V


-C


I


\


'^*-w..-^









-- --- ^ L I -. yp ,--- - ,
rbu c l.itr... it dep ._r, or ,por s ha. t' ,rmed


PlugI thati h ie .it.iried r. blister *.[r dis.-.l.r r
fire 'oo much ind i,, c plrc.ign i.'l n Tr ru i.tl.l.r [
auIse of i the trILic .nrid .orrec[ it

,, :, l.lh il s u' tL' I 'lb h W-,^."
S It insulalor i black \our plugs arc run-
ning nooco ld unlcs \ou haie a ne\ trucks
This means ,oo much oil ii reaching the
, conihbusion chamber. Best find rhe reason
for iI and tix it up. tlse you'lll be cleaning
those plugs preirt ofrcn.


SI SEE.... I: INSULATOR IS PULL .
WITH BLACK PILM OF CARBON...
LOOKS LIKE SOOT.. AND -YOU HAVE


ill
he


PERIOD. ONCE YOUR. TRUCK HITS /
PNOMMAL OPERATION IT SHOULD CLEAR
UF. BUT IF IT DOESA"'T, Svirc"c TO
HOTTER RANGE P::-LUC-.-s

Afrcr looking ouer insulator. gise the plugs a good cleaning,
gap and rest them good idea r,, chec-k contact surface ,if high
tension cables for corroion
CH, .p T.IIIISllS
k I ;158 G 41 4 G742 G49 G744
S 'j1 IJ 030 IN II'0 3 I 030 IN 028 032 IN 030 IN

\ hen oiu put the plugs hack in, cr. and get nt gasket-, i.)rd
Stock No. H (10201 5(l189 It rnot use sour old ones but make sure
they're clean and aren t crushhed All MNScries [actical "heeled
'chicle- take a I-i-mm plug See sour Ord SNL for the right
,rock number
ot olqunlllg foot 4 ou0iiabs jfil 'lrps 3 ln 3i'ph $pl3u Cur
G740 6758 C.I 142 1J49 74
25 j30 2530 :.258 25 25 ?5









SCe Jiglition ltning

S Now... IvWEN \0'.) START PREVENTIVE
/ MAINTENANCE OF IGNITION TIMING...
G ET YOOLRSELP A TIMING LIGHT
ADPAPTER (om 0S-rTOC 7. 17-A-297.-0)
L AN ONE OF= -vo TIMING LIGHTS AS
IILU0STRATED MRe/5F
i Ord Sriok N.I I -.L. I936. t11: FSN 66i25-.,
S3-.20-"3 has three leads Blue to adapter. \
red i>, poiisci bareri terminal and black u \
ground on ne&ygr\c barrer\ terminal

lOrd Srock No,- -, f L.l-j li h s \,, Ic.lads
One it adapter, 'other [o ground
Rcnem,)e spark plug cable from No I plug and Insrall adapter
i n threaded end plg ,nn plug onn cable ti, ad.apir Tim
I" ih engine at idle
Iiminta jars ae nb pointrre


mining rpetfications Ullorr eop Drab tentrr in Drgrres
VEHICLE SERIES C740 G 75j G"I G : G749 U744
IIMIrN SET TO MARK BTDC J BTOC SET TO MARK. 5 BTOC
X '-r'-NoW 7TIaRE' A TIP YOUR BOO-
S ,'ES'N-r SHOnJ' E-EiE CN G741 TIMING.
SPEAL. CONDITIONS, C 1000 TO 2.500 -T
ALTITUDE ) TIMIING'SJ OcTTA se er AT "
TlWO PECGREES AFTER. TOP CE-AD CENTER .N EJ Yl
SHI6H ALTITUrIDES iT CAN 0E -EeT LP' TOSI 51s -
SGEES AFTEi TrP pEADo ceNEiZ. AND AT VERY
0 OW ALT TL;ype ro0 TWO oREoae BEFORE TOP
e54a 1c NrE CAMN'T C0 SEvON 7 H.S5E J.,


Vacuum gage
Ord Si",ck
No. -I .G.o.(


PC Jfunl Pump
therhing Oultput prrssurr


I.


(rank cnginc
I ignition o) i


-m
Diiconncct gna Install pressure
lin I ouipurside gage
oi pump


';49 it '-1
"\ hen timing this truck, the engine should be sec to idle at
-100 rpm or leI If it s ser higher. the advance mcchaniam till aci
into the aci and gi'c o'u a fault reading.
2..7 -- -;


il.Irrrupon Doll &lhoulb PSe t)rsrt rabinigs
Gil4 G158 6 741 G42 '44
4 PSI 4 PSI 4 PSI 4 PSi 4 PSI
Nult (,' 21 : Ton ha, clccric.al tucl pump Dis.onnuci
luel lhirn frim ouilci firing initi m'n .irl Connect gage 1r:
hiring Turn ignition i irth on and read gagc Should be at
2' : i. Ps1


B










Pr lanifolb V1acuum T lst


Connect hose ot gage


I. has the shake
or drifts slow l, so
gas-air carburet
mixture adjustment
not right



| '




3. \\ ases steady
back and forth, \i
ha'e a compressic
leak between one
more cylinders-us
alls means a leal
salke, a blown he;
gasket, a clogged i
take manifold i
fault ignition.


Make sure connec-
uons are tight


Normal reading at sea lesel I'-21I.
Higher almtudes give lo"er readings
3f Dour flerbir ...
-I. Drops at inier. lli )
% als of from i to 5 in-
chesbtloa the normal,
S sou hase a sticking
salte.


2 Graduall) drops
to zero, \ou ha'e a
clogged up exhaust
s) stem.


i Sta s stead\ at
reading lower than
normal, means loss of
po%%er caused b) late
ignition or late %albe
timing or improper
ta lingof piston rings.


6. St[%s tead\ at a
low reading. Check
for manifold leaks.


Before you slam your
hood down, there are a few
other things to check out.
First, make sure that all air
cleaners are free of grit,
slime and dirt. A free air
cleaner leaves your crank-
case breather lines open so
the crankcase can get the
air it needs to breathe. If you're
operating'in sandy country, your air
cleaner % ill need a heckuva lot more
ser ice than in normal areas.


Check carburetor throttle adjustment to
make sure truck isn't running too slow or
too fast. Use engine tachometer (Ord Stock
No. 18-T-231). Adjust while operating at
the following RPM's.

JEEP-600 RPM o 50
G742 2V2-TON-450 RPM0
G749 2V2-TON-375 RPM 1
G744 5 ION-400 RPM
G741 %-TON-USE VACUUM GAGE.
MAXIMUM READING 21"


The G'41 %-ton truck and both 2V2-ton trucks-the G742 and
the G'-49-have seasonally-adjusted heat control valves that have
to be checked. Make sure this valve is working free-just give her
a li' jiggle and set it for the proper season.
Qtiter Qlinige o Cheth

BATTERIES, CABLES, COOLING SYSTEM, OIL FILTER ASSEMBLY AND ELEMENT,
CYLINDER HEAD GASKET, ROCKER ARM COVER ASSEMBLY AND
D IHAUIST MANIFOLD AND GASkETS C ASKET STARTER AND SWITCH
EXTERNAL FITTiNGS AND LINES ASSEMBLIES. VALVE COMPARTMENT
GENERATOR. REGULATOR, COivER AND GASKET
- -AT NCT AY
S -...UE'SEE P EPAzTMer.. M UT-
! A~tf NOW 9y L-, -I4(AVE WHATr LL 71JPN YOU OV0.
Ifr. AND NOW ASVUT. IS KNOWN TO MY LVEY CvAPABLE
MY PERSONAL ) -H MNs AN,
AILING ', WNRLU-Is. N",raI I1e=


II


C a r ub i iig l temr


'''


"









CARBURETOR HIJINKS
You ma\ rind \ourscIl thinking that the threc Larburcroris for the G'4 -1-erics
5-con 3re interchangeable for all the ~ehiclc in [his lerine. because thce look
alike. But. the% aren'r-so caution, friend, caution.






Carburetor Carluretor
S is the one aimed for the is the carburetor made for
SM62 and M246 wrecker all the other trucks in the
SrG744 5-ton class.


-..--,- l------------ -------
1- .. n 7


Now. these rao carburetors-G(744-8327282 and G744-7375469-have
different governor calibrations and can't be interchanged, so don't tri it or
else you'll find yourself chugging along at nix miles per hour.
On this third carbure[or-G744--8331877-)ou can put this one on any of
the 5-ron trucks with a little fixing up. If you're using this carburetor on an)
5-ton truck except the 62 and M2-46. 'ou can use her just as she is. 'hen it
comes to the M62 and M246 sou hase to use Gosernor Spring G'44-832"323
wlth this carburetor.
B( the wa%, this G714-83318" carburetor is the one that'll be in use on
all 5-ton trucks before long. It's replacing the other ro.
12










effzMe RoudeC'
"SHORT 'N SWEET DEPTH

r CAN'T
UNPEaTANV
iTr ONE SIsEs


wflcFT*
wrccra~


HOT. o0E 1 1



,a7t dor Ced?
With winter coming on again, .ou gu)s driving the G'58. G"'. and G'49
trucks will want to check our sour power plant heaters to make sure they're
hooked +up right.
Vehicles with the converted \World \War II power plant heaters in them should
be looked at for proper hook-up. If it's wrong, )our truck aill start feeling like
a frozen turnip.
Here's the way these particular kits have been set up:
G249-5701173 converted to G249-5701730 for the M38A1.
G249-5701093 (12V), and G249-5701176 (6V), converted to G249-5701370
for the M37.
The G249-5701099 converted to G249-5701465 for the M135.

What sou do is follow the lead which runs from the starting side of your
switch. If this lead goes to the center terminal of sour resistor (Mfrs Part No
A15898-GI ). you have to make this switch.



START RUN
-A

MOMENTARY ON CONTACTS t
RESISTOR
0 -0 o MOTOR


Take the lead from the center terminal of the resistor and transfer it oser to the
end terminal. This is the same end terminal that 'our RIIN wire is hooked up to.
\ idh the starting lead hooked up rong, you'll be getting too much voltage
through the motor. This churns up more air than the combustion chamber can
handle, flubbing the fuel-air ratio and cooling the igniter. Makes for a cold, cold
engine.







Seat 4ed4awt


Read tde Aeottem

Questions have been pouring in
about para 2a of TB 9-8024-1 (19 Jan
56), which says, "The transfer as well
as the transmission control should
always be placed in the neutral position
when the engine must be left running
while the vehicle is not in operation."
Guys are throwing TM 9-8024 (Oct
55) into the picture, because this TM
says that when you go to check your
transmission fluid level, the transmis-
sion must be placed in F-1 High Range.
So, they ask, which is right-the TB or
the TM?
Well, they're both right-the TB and
the TM.


a Hove hand brake set light and foot on
broke pedal-



before pulling out dipstick.

The TB applies to all those other
timesyou have to keepyour truck idling
when she's not in operation.


A lot of guys driving those G742
series 2V2-ton trucks have been letting
their rear spring seat bearings go ka-
putsky just because they aren't lubing
them like LO 9-8022 (4 Nov 55) says.
When these babies go bad, they can
eventually affect the operation of your
rear bogies. So, why not play it safe and
lube 'em once every 1,000 miles like the
LO tells you.
All you have to do is loosen the
screws on the seat cover just a bit be-
fore lubing. Then, when you start
lubing, you can see that grease come
out all around the loose cover. That's
when you know to stop shooting grease
up there. The lube that shows has to
be clean or else the old lube will be left
up there. After lubing, just tighten
the seat-bearing-cap bolts. Every once
in a while, in between lubings, check
these bolts and make sure they're tight.
The important part of the operation
is loosening that cover. Some guys have
been sticking a grease gun up those
seats and have been shooting without
that cover being unscrewed. So, before
you know it. there's enough pressure in
that seat to pop the seals.
Some of these seats have been hitting
the field with plugs in them. Reason
for this is that sometimes the factory
runs out of grease fittings and has to
put plugs in with the idea being that
the plug will be replaced by a fitting
when the vehicle gets into the field.
The way you know this is by looking
at your LO-if the part calls for grease,
you're to have a grease fitting in there.
4



















Got something for you. which will
help stop rust from fouling up the out-
side of your Jeep's fuel tank.
Lots of sand and grit form on top of
Sour fuel tank compartment and fill the
space between the top of the tank and
the bottom of the Jeep's floor. This stuff
holds moisture like a sponge. You can
see what happen-n hen the vehicle
moves, a lot of vibration is set up and
the sandy grit act, like an abrasive
-against the fuel tank The tank's pro-
tective coating is worn away and the





Some guys have been much miffed
when that red warning light on the left
front fenderof their M62 5-ton wreckers
suddenly decides to go on the blink.
After checking to make sure the bulb's
OK, they're stuck because that circuit
has been a little hard to follow.
That warning light is connected
through a flasher unit to the warning
light switch on the instrument panel.
The switch is connected to a circuit
breaker on the engine side of the fire-
wall. If you ever have to trace that cir-


thing's left widc open for a case of rust.
The aa3 to do ana% with this is to
remove the fuel tank from the leep
annually or every 12,000 mile.
Wipe all the dirt and grit from the tank
and spot-finish the surface w here the
paint's worn off-use rust inhibiting
OD enamel (Eng Stock No. 52.3465.-
300.010).
This dope's in TB Ord 635 i4 Apr
56). It'd be a good idea to jot it down
somewhere where it'll be picked up ai
every D2 service.




cuit, just follow the wire tagged with
the number 325.


I

















1 belt is part of every nan's dailN
appearance. Not only does it make for
a sharp-looking character-it also
serves a most useful and worth-
while purpose.
But, just like most other things,
it's got to be used right. If it's too
loose, it gives a drape shape; too
tight and that seat looks like it's part
of a guy's anatomy.
Same with your vehicles-if that fan
belt isn't adjusted just right, it'll cause
trouble.Too looseandyour generator and
water pump won't put out that oomph
the way they should; too tight and
a strain will be put on these parts' 'I
bearings. Your water pump may
sprout a couple or three leaks and
before you know it, you may have
to ship it back for a rebuild job.
And, of course, those belts may also 4
get ruined-frayed and glazed, that i,.
One thing that may tip you off to a
badly adjusted fan belt is any mouses
squeaks you hear coming from under
the hood. This may mean that your belt s
too loose and has to be adjusted.
The best way to know what's what
tho, is to check the belt's deflection
once in a while.
What say we go over these adjust-
ments for your M-series vehicles and
show you how to make 'em?


You II gel it just like you got your deflection on the Jeeps
-loosen the generator odjusting-orm-boll and pull the gen- ,.
erator loward you if the tension is too loose you II push it You can also use a ruler here. Then,
away Irom you if the tension is too tight, tighten up on the adjusting arm-boll.






to set it. loosen the two
To check, put your ruler in safety nuts holding the gener Alter you hove the righl de-
place like it shows and press in ator to the mounting bracket Ilection tighten up on the screw
firmly at a paint midway loosen the screw holding the holding the generator to the.
between the generotoi and generator to the adjusting arm, adusling arm and on those two
ronkshaft pulleys to gel your so you can move the generator safety nuts.
deflection toward or away from you.









E G749 2'/2-TON
TRUCKS

The adjustment for this truck
gives you a little leeway-
between 1'/ and %4 of an inch.


THE G744 5-TON
TRUCKS
The adjustment for this
buggy also gives you
a little leeway--I
to '.4 of an inch.

Get a 30mn bar or,
use a irm tool-and-wheel
nut wrench handle lOrd
Stock No. 41 H 1541 101


To gel it, loosen the
adjusting-arm-to-gen-
erator cap-screw and
the nuts on the two
generator mounting
bolts.


Put bar between
crankcase and generator
so its lower end will
push against the cronk-
case at a point directly
below the front cap-screw
on the valve-tappet-
chamber front cover.


Put a light pressure on the
belt midway between the
generator and water pump
pulleys, and push or pull the
generator until you get the
right deflection. Then, tighten
up on the screw and bolts


Pull the upper end of
the bar toward


Loosen the generator-


Y-'- ', '..MATCHED BELT; S-..-
The Jecps. the G'-i2 2 1 ..on trucks and the G'%i S-rons all ha\t matched
pairs of fan belts. If one Kbel goes bad. change both of them.
Here's hin-these belts strctch. If sou put on one new belt nichour changing
the other, the r' o belts on'i ork right because the older one w ill be looser than
the ne, one. So. it's a good idea to change both belts at the same rime.
18










Been having trouble hooking up your trailers to your prime movers, because
they have different kinds of receptacles?
If so, you'll be glad to hear that you can now get adapter assemblies for tow -
ing any trailer with any prime mover (and vicer verser) now in the field. And
the only thing you'll have to change is the light bulbs on the towed vehicle to
make it jibe with the voltage of the prime mover.
TB Ord 616 (21 Sept 55) put this into being. There are five adapters you can
get. Here's how they shape up-


Adapter 4/12-pole socket contacts
Stock No G742-8713796


At receptacle of prime
mover having 4 poles when
prime mover is towing trailed
with 12-pole receptacle.


*This'll be shown in a change to TB Ord 616.







NO! NO! NO! NO




What can y'do to wise up those
hard-headed schmoes who some-
how refuse to learn about that
EMERGENCY switch in the circuit of
their M48 Tank personnel heaters?
This switch is not-repeat, NOT-
to be used to merely turn off those
heaters when you're through with
em. It's there for emergency use
only-like for a fast fording or when
an enemy gas attack demands that
j all power be cut off from the heater.


These heaters are self-purging. When you use the heater control box
ON-OFF switch-like you should-there's a delayed-action set-up in the
heater that lets the blowers run an extra couple of minutes...to cool
the heater and kick out any balky, unburned gas that's still around.
Just give it a little time, friend-it'll shut itself off.









r^^ylj
SCALLEP___
THM JOCE
TWIO OnURS
* AGO.., AN
ITA SARKIfR
oUT HERGN N
POUR INCOMES
- P A SULL'S
N ITRIL.


...EASY cEHREY. OH
WH RDO VOU HERE...WwO
p AR E EYO...
*T.F j*5EeR A
W '
L_ '-'6.;


BOY 4M
POW LrT'6 SFE Z LUCK WmLA1 ig AHEM.. Z
WHAr IS SWAT WWAT -R Y AI ....
WITH 'VI-OFU sLE..
rRY... YUPf









SFRS, LET ME POINT
OUT THAT ARMY OATTER-
IBS ARE GREAT STOPE-
OUG6~ OF POP5....
I "T'le'TICIcK is TO,
SKP THAT PweR
-4 ....E-EE TWO
MATCHED BATERIES
SO TAKE C
OF 'EM
mL T

H4ERE, NOW PUT
YOUpR HOT .IrTrLE
SANP WE'LL GO
OVBR TH4 SIMPLE
LITTL~IC_419GI
CARE... E-A-S-Y
SSOY...-'R REAT H-
IN& POWN MY
NECK/ ,


o TA AKE our You "a"
;O D BATT1MERIS, FIRST
"ISClONCT r4 TH*E aUNP
, I~Lp.E...T7AT'S THf NEG-
A IVP 'WT ON ALL yOUR
T C CAt VElICLES.
TH4 WAY IF YOU
HAPPEN H t TOUCI .


r wOSVE r
CA YOU
ST NO SHOfT
A B rlATr'LL.
B AFR o00.









N OW TO WEN TH 15 I


NO ..NO... EACK OFr- VV1E4N
HOW A O LTS AIZE 60PPOSBO 3..x PONIT
TO -r 'ThME OATTERY MEAN 6WJP
FIRMLY IN 71E 774E 7WREAVSU...
- POX...SO'-6 E I ~ ...COAM WERE..
VIUAPAION cp PUV A9ItS
THS RUNNING FoVERER..
VEHICLE MOCESN'r 1.. ...
RUIN iTr? r ?;


S23
23"


IF HOLD DOWN (LAMPS ARE TIGHTENED TOO
TIGHT YOU (OULD CAUSE A (RACKED OR
DISTORTED BATTERY RESULTING IN LEAKS
WHERE THE SEALING IS BROKEN.



A-






VING DIRTY TERMINALS
LIKE KISSIN' Y'R GAL
THRU A PLATE O' GLASS


BATTERY T


CLEAN


/ /*


/A/ .:


111








NOW..0BEFCZE
INC TAKE OFM..Ikl
YOU iEg wt
000oPAVICLE...

INJ Y009 14P

dro...


LOW TEMPERATURE... BETWE
ZERO. A HALF CHARGED BA
BELOW ZERO. A DISCHARGE
GREIS BROW ZERO







FULLY (HARGID HAIF (HARG[D
-850TO -90 31


rDY3U \CHARU.&E

FOM ,JtiCPONLVA~
IL K10MF F-AM

,51V05 youJ
2rumI CK
j~n1RmIC~


WASH THE STUFF RIGHT THEN NEUTRALIZE THE ACID WITH
S FF....USE PLENTY SOME BAKING SODA DISSOLVED
OF WATER.. WEAR WITH WATER
RUBBER GLOVES.
RlrBp~B*14








ACID ON BODY OR IN EYES?
WASH OFF WITH PLENTY OF WATER
AND LET A DOCTOR LOOK YOU OVER


LEAKS
ARE
CAUSED
BY A
POROUS
OR
(RACKED
CASE


DON'T
USE THIS


SOR MAYBE YOU RE GET.
U IF 7 THE LOOK FOR
AM BATTERY TING TOO MUCH CHARGE
SIUCH, A, .NEEPS CRACKS IN _
M 1- wAr(RAKS FROM THE GENERATOR THE
l0VC UP o F[HE CASE TROUBLE S PROBABLY IN THE
NORAILf REGULATOR -
-


OVER CHARGING IS AS BAD AS:UNDER-
CHARGING. MAYBE WORKS -FR:i'.
IT C(ORRODES PLATE IDS:. .-..


A(ID ON CLOTHES'
T.S...
CHANGE 'EM









rAND HOWN TO STOP IT... (THIS COULD BE SERIOUS)

ON METAL PARTS OF YOUR BATTERIES .. Y PREVENT ANY
CORROSION BY EATINGG PARTS WITH GREASE

r GREASE[
IIGHTtN CLEAN
VENT PLUGS WITH SODA A SMEAR
RSIO AND WATER

OFF ALL
CORROSION


NOW, I.FT'S TaYX' 9..
T'AL04AK SURE :340 NOW
01AwrrU- Amo gar
IN RlGHTf
A 60COML...
YOU VS BEEN
so MeLPFUL...
HOW AUrOVT A
pA7E .. SAY
7 A ISHIOW
A` AFrEf


N6W';IP YOU'LVTi-RTdOH YOUR UGHITS'-AND'
(CHICKTHEAFMErER;
IF AOU HAVE
VOLTMETER
IF Y iOU1 U MU IT SHOULD BE
II 1OU GI
DISCHARGE 'IN RED WITH
N-OU'al IN-1 IGNITION ON
OK








BMETiWIUHI T A'AkqUND AFOR




NOW, JOrY,

-lrE I 7310r Vtw SLURP-. I 7141
111w Woz cow.UBe LL ap-W ma
woz I TO SLUP
Krow~t rr miiEL
4~~~, WUXJUr
y Picvrmp
UP WPAE























Dear Halft. last,
I uould like to knou it it i5 pocible to make Me Jadtinmeni of the Irant band
ou, the H .dra..llati, trucks aud alu aa get the ,r'ulatoi pit exactly) flush it ith the
machined surface like it sayi in T.I 9-8024. page 3e2. para 2ri1. Or if nor, hbat
tolerance tan I hatz and 4know the tratsnmti.ton u ill work OK?
SFC R. H. R.

Dear Sgt R. H. R.,
I'm afraid you'll ha'e to check with
Ordnance an) time you can't get that
pin flush with the machined surface.
The + or ',4-in is all the tolerance
you can have.
It seems that it is sometimes possible
for the pin to stick up quite a ways and
the transmission will still work. But,
you're exceeding the %Near limits, and
the cost of eentual repairs is likely to
be far higher than if you send her to the
shop the first time )ou find ,ou can't
get the pin down flush. Some few pins
got cut too long. but Ordnance is the
only place it can be checked.


Hald w


Mae








Dear Hal-ast. wONaT r
Got a pi oble n u ith radio equipment Ft FINFW"
o, our 1 \48i tak A.s the set (AN/GRC- -EASY
o non 1ustalled on the mount, the -
,admo guard ,iterleres with the channel Z S..
seletior k ohbs. II lat're the possibilities
oi ttoulltiin the ., a little farther to the
ear r 1r g e an' ,eearance?
SFC T. A. --
Dear SFC T. A.. Dear Half-Mast,
Pretty. good. I'd say. The manual procedure (TM 9-772A)
On later IM-i's this was done at the for removing road wheels on the M76
factory. The mounting holes were amphibious cargo carrier works fine for
changed to ;/.. xI -in slots, the outside wheels. But did you ever try
You can get the same result on your taking an inside wheel of the Otter,
carl 48's b. merely drilling a new set using nothing but a lifting block? Man,
of holes behind the original holes. Then that's one for Houdini.
intrcronnecr 'erm to form I-in sloit. /
Drill new holes
and connect
with old .
holes to
make 1
slots.


That's bout as iar as you can move
the set back i thout bumping against
the turrer casting, or interfering with
other ridin equipment.
But tha much extra clearancewill let
ce'n a pudg\ pa\w get at those knobs.

; ffa/^


We've found that the job can be done
by using a hydraulic jack-one like you
find on the 2V2-ton trucks in any motor
pool. Just jack up the arm and remove
the wheels-lowering the arm (with the
jack) enough to let you pull the inside
wheel out over it.
There's just one drawback to this
method. The way the jack rides the track
and holds the arm, it's not too stable-
and takes a lot of care and steady hands
to do it safely.






I3 theie any tool available that'll do
a better, safer job?


Dear Mister A. W.,
No. Not yet, anyway. But there is a
wheel arm lifter for the Otter being
worked up. You'll be getting the word
when it's ready.
Meantime, the jack'll have to do the
job. Aid, like you say, ya otter take a
heap of care to handle 'em safe as pos-
sible.







Dear Half-Mast,
Can you tell us National Guard main-
tenance center guys what we can do
about our M215 GMC dump trucks??
They are shimmying like blazes. The
shimmy comes in at about 40-MPH
when we're running empty, and at
much lower speeds when we're loaded.
Naturally, we've checked for tie-rod
and drag-link wear, knuckle-bearing
and steering-sector adjustment, etc. But
since the truck mileage runs less than
4000, we didn't find much.
CIVO E. J. H.


Dear NMister E. J. H..
How about the new MN\ O's for that
front end? Ha'e 'ou applied M\WO
Ord G-"49-\\'22 18 Apr 551. marked
Lirgenl. and N\\ OOrd G'-i9-\\ ;2 12
Dec 551?








S-- -_ ..




The first one puts a stabilizer bar on
the truck


The second calls for intensive rein -
rorcement of the H hole frame, and the
part that concerns ) our steering is
the beefing up of the front cross mem-
bers and spring hangers. I think you'll
find that these ito modifications will
lick %our problem.

I.11- a

























Bore Cleaning Clues-
BROTHER, ITS FREEZING OUTSIDE
U i 5 I hearingg winter underurear means more to arril-
-. le rr and AA.1 men than itching in a hot room. Freez-
-& I ing temperatures call for greater care and sped in
V cleaning gun bores.
Good old bore cleaner aill do the lob-until the mercury hits-20' F. It
sludges under thar temperature, and it's nix on adding anutfreeze because you can't
dilute bore cleaner. So below 20' F iou gorta use a water cleaning solution.
Here's a chart on how much alcohol
or antifreeze compound to use in rour
water cleaning solution at sub-freezing TEMPERATURE ALCOHOL ANTIFREEZE
temperatures. Put in this man% quarts 20 1 1
of antifreeze agents for eser. gallon of 100 2 lh
solution used at the Fahrenheit temper- 0o 21/i 2
atures shown at left The range includes -15'' 4 3
temps up to + 20 F in case there's no -30' 6 4
bore cleaner at hand and it's necessary -40o 11 5
to use a 'vater cleaning solution.
The big deal on cleaning a bore in sub freezing weather r is speed. Once \ou've
swabbed until all the residue and crud are cleaned out, hurrn to wipe it dr\
and get some PL Spccial on to present rust and corrosion.
If you'ree in a spot ;here Nou can't measure antifreeze agents too accurarel.,
make this a general rule: It's better to use too much than too little.








S-- --WIPE IT DRY

Have you been frosted because
the breech mechanism on your 'LL nI V oN
artillery piece freezes after U c6T EHJ
swabbing during frigid weather?
There's no trouble stopping
the freeze-up, or at least cutting
down the chances of its happening. ,
All you gotta do is wipe the chamber and breech mechanism dry as soon as
you've finished your firing mission. You also wanna remember what your LO says
SBPEE NT ININ. \ ... disassemble, clean and oil
SAR&E. U REA the breecch and firing mechanism
51X.o r in rmmediarel I aterr hrinQ and
SA for the next two das.
AEcr all-an ounce of prevenuon
is becrrr'n a pound of ice.


--Q





Tankers and field artillery guys who remove the M48 telescope mount from
tripod M10 or M17 know that screw A317311 makes it a bassackwards deal.
When the mount is taken off a tripod, you've got to remove spindle B181029,
which holds the mount on the tripod head.
Before removing the spindle, nut A317317 comes off, and
4D before that, screw A317311, which holds
on the nut. And there's where the rub
N comes in. Some guys turn that
L .NUT A317317 little screw counter-clockwise
with their fingers to get it out-
SCREW A317311 and it won't give. So they
TURNS (IOCKWISE get a wrench to put on the pressure-
TO LOOSEN and the screw head shears off because
screw A317311 has a left-hand thread.
It one of the few left-hand threads you'll run across,
so watch out for it. It's bassackwards from an ordinary screw. Turn a screw
with a left-hand thread counter-clockwise to tighten and clockwise to loosen.







T46EI Range Finder
CASE OF THE MISSING KNOB
Soon as ou hand this copy of PS over
to the next gu), take a look at the stereo
control knob. T46E1 range tinder, 90-
mm gun on the M48 tank.
Still there? Good on iou, 'cause a lot
of them are missing. COMPOUND
To keep )ours there, look at the VARNISH
screws which fasten the knob to the
rheostat shaft. The should be screwed
in tight and then secured with a drop of
locking compound t Varnish, Eng Stock
No. 52-8610.500.003 1.
Some of those knobs are being lost because of no locking compound. Check
Sours.
BY THE LIGHT...
You can take a spoon along with .ou when wou go out in the moonlight...
and leave the tools back in the supply room.
There's no need for the tools in the removal of stoplight and taillight assem-
blies on the bogies used ith the 90-mm AA guns and M2 mounts.
S Some guns hase been toted along the
road, minus the light assemblies, which
disappeared overnight. You know the stores.
The bulbs burn out and so the assemblies
are changed. Someone gets our assembly -
and you're left holding an empri bogie bar.
That's all changed non. The next supply
manual will authorize the drauing of the
light units that make up the assembh.
While airing for the manual,
l ou can get the light (bulb) units under
these numbers:






Blackout taillight- Blackout laillight- Tail light and stoplight
H004-0504423 H004-0504420 unit-H004-0504417
34







BETTER TO BE SAFE
How's your tank's .30-cal M37 machine gun been acting lately? Have you
been able to fire the gun even with the safety on?
Your trouble may be a tolerance stack-up on parts like the sear, trigger and
back plate. You-know, a little bit here, a little bit there-all add up to too much.
If these works aren't matched just right, the top plate will be lifted enough to
throw the safety out of whack;
It's easy enough, and a smart move, to run a test before loading the piece. You
should also run the test whenever the back plate, back plate latch or trigger is
replaced.






1 2




Retract the bolt to cock the firing mechanism. Move safety to right until letter "S" is visible.
You've done the first two things lotsa times, probably in your sleep. Next...






Lift up the back plate. It won't move for. Pull the trigger while holding up the back plte.



The trigger shouldn't have re-
leased the firing mechanism. If it
did, replace the weapon with a gun
that does pass the test, but fast.
Hang on to the gun that isn't
working right. You'll soon get
word on what to do with it. ..










.r .7


IIL
~99~j ~fiF-s~T~J'~


Psuc ER OP


Dear Connie,
Here in Japan. c'\ee been hang a lirtl trouble ich oil leaking from
the transmission case on the Clark Model -5 Planeloader. The leak seems
to be w here the transmission case and clurch housing join together. All %ou
need to do to stop the leak is replace the transmission plug.
But \ou know ho" lazn some gu\s gCr The plug is hard to get out-all
because the snap ring iFSN ;4*?0 16-4.21 13 around the plug can't be
removed ulthout a lot ol trouble. As a result. some men neter replace the
plugs Thes tr\ and keep it from Icaking b. coating the plug \ith perma-
rc\. That still doesn't stop the leak complctel). and "e''e already had a
couple of burned our transmissions
If %e could get the snap ring out. removing and replacing the plug
would be eas- The outer part of the transmission case his onl) a !"..-in .ast
iron thickness. \\ hen some men use a scre' driver and hammer ana) at
the snap ring. the) somerimcs break o f rhe ring groie on the transmis-
sion case Those cases cost too much to hate to send to salvage.
\%'hat we need is a snap ring ith holes in rach end. Then. \ hen %'e % ant
to remouc (hc ring, .e could insert sturd% pieces of wire in the holes, gise
it a squeeze and pull the ring out % ith no trouble Afitr that. getting ro
the plug ,nould onl) be a formalin \ hat do M)u think?


9:




/'




V-.


-t


PFC N. S


--r C e r I IC--_ 1~1


Lkgbzw~i~'~C~~










Dear PFC N. S..
There s nothing wrongg "ith uour thinking, lad. You'%e got a good idea
and you'll probably be happo to know that there is such a snap ring-holes
and all-in supply. right non. Here the correct nomenclature tor n:
Ring, snap. retaining, inctrnal, 2 -140 housing diameter. 2.364 free di-
imeter.
You'll ind 'er listed under FSN i 4(0-281 .405. That not all This
ring'll fit All these transmission cases listed belo..


FSN 2520-164-2155, Case, used on MHE 59
FSN 2520-164-3477, Case, used on MHE 61
FSN 2520-358-8423, Case, used on MHE 116
FSN 2520-358-8446, Case, used on MHE 118
and MHE 142
FSN 2520-499-8825, Case, used on MHE 125
and MHE 150


FSN 2520-358-8495, Case, used on MHE 141,
MHE 143 and MHE 149
FSN 2520-375-0575, Case, used on MHE 146
and MHE 151
FSN 2520-375-0587, Case, used on MHE 147
FSN 2520-217-9253, Case, used on MHE 148
;-e.~~~~~~~ ----------------


In all c es. you'll tind that the snap ring can be inserted in the -*in deep
ring gruo.,e tr.hou an\ trouble and iou can ta-ii it right
Looks like \ou can sole ruo problem, at once b\ getting this ne\i ring.
First off. it'll make the plug ceai to get to That, of course, %ill alloi Sou
to krep a close labon the leaking mil Also. ou % on hate to be salIaging
those transmission case c'enr\ time %ou turn around

sl. -7>-C\ Con ,(n


-MMM-.00
























"FuHM THROWER FOEL TANS
When you flush the fuel tanks of your
M2A1 portable flame thrower make sure you've
got the right kind of cleaner. If you don't,
you might end up with an injured
weapon.
The cleaner for gargling those FUEL-
tanks is dry cleaning solvent. TANK
You'll find it listed on page 8 of 0 11 FILLER
SM 10-1-6800, dated 29 Sept 55. PLUG
S Carbon tetrachloride's NG for this job. The stuff'll rust
your tanks but good. Take a look at the messed-up
fuel-tank plug above. It'll show you what carbon tet
can do to a tank's innards.
So's you won't forget this caution, make a note reading "Nix on Cleaning
Tanks With Carbon Tet." Clip it to page 50 of TM 3-376, "M2A1 Portable
Flame Thrower." The note'll remind you to reach for the right cleaner when
you're getting ready to freshen up those tanks.
Carbon tet is really unfriendly stuff. Not even the Chemical Corps experts,
with all their special know-how, tools and ,-
equipment, are authorized to use the stuff when cleaning /-376
or reconditioning the flame thrower tanks. So please
keep the stuff away-far away from your fire-gun.









Decon Dividend
From now on you're going to rest easier when it comes to remo ming the chain
guard from your truck mounted Decon (M3A1's and M3A2's).
A minor change has done away with all that wrestling with the propeller
shaft when you have to get at the Decon's pump chain and sprocket. You'll
now be able to remove the chain guard in a matter of minutes instead of hours
... and without even nudging the prop shaft.
The time-and-labor-saving fix slices off the bottom end of the chain guard
The cut is made straight across at the center of the prop shaft hole.
New M3A3 Dectns now come with the chain guard fix already applied. But
a few early model M3A3's went to the field before the change was adopted. If
you've got one of these M3A3's it's eligible for the fix, too.
Take a look at the drawing and see how the front and back pieces of the
section that's cut off are welded face-to-face to form a one-piece boot.

Sliced off front and back sections welded to- Mating brackets are welded to upper
gether to form boot. section and to boot section. Screws thru
Brackets hold two-section chain guard
Propeller fogelher
shaft

-Mating brackets
go on both sides -

Small brackets are welded to the outsides of both the upper and lower sections
of the chain guard. Screws thru the nmring brackets lock the rmo-piccc chain
guard in place.
It's a real improvement. The pa\ off comes ecers irric sou igo co inspect the
chain and sprocket, grease, repair or replace the chain. You simple ork-ofl
the four screws and there you are.
All you have to do to get the fix is lei sour field mainrLnance support outhi
know your Decon needs it.
Da Caonie a Favot

On page 29, PS 45, change CLo an-ding Geneal
the address on the envelope Arm Chem-ial te, -3-
. made up for a UER on a Ce,
Si m a ti and Ch ai./* l Corps .lat eal Coimand
S* Chemical item to read like this:
Arm"1 CbreutcalCCe.cl ( ,.larylan/l
S. N C,\IL .l. .1.S:l .

39


















UNSOLID SEATING ,{'I
Dear Sgt Dozie.
We've got a bi ol a probl : utl on, of l the CIlak Bros .lodel HO.
6-4C air compiE.iotr Iu'4ie : Til i T/, iftelt) itlhEl tl t UOI o i.eiial
properly. AnJ u-'le it doe i reiea, it leak Got aun idea ui/at the
trouble is and bou t, can cure it.,
Cll 0 /. L. H.
Dear Mr. J. L. h..
There's no doubt that the salIe assembly kou'rc talking about needs
to be repaired or replaced. Here's % hat happened-
Some of the compressor units that had the air receiver fabricatcd necer
had the welding splarrers or slag remo'ed from their insides. As a result.
hen the safety relief \sale %as released, these mame elding splatters
and slag ere carried b the air _rream through the air outlet line.
This caused scoring and serious danmae to the sals: seat No%%
the alie don'tt reseat properly and that causes a loss of re-
center air pressure.
S Actisities using the Clark compressor ought to
prepare a w ork ordcr for the ?upporting Engineer
Field MaintenanL.e Shop. asking them to check the
inside of the receiver lor es idence of cwlding par-
AIR ticles or slag. It's easy enough for them to take
aRECEIVR look-see .it the inside vnall of the rcceiser.
RRC ,: The'll take of the coer plate from the
\ inspection port of the air recener and
take a look around If the\ see an\
liag or metal particles, they'll
i get the receiver removed and
cleaned o ut
U


y


WORKS TO A "T"
Dear Sgi Dour.
II e toumd a good
solution to our probe.
learn o/ printing a ud
lubricating the stall
lIcubIf,"g aIr ll PRIMING
uti to lugitnel a"nd PLUG

1,isecticid ,p,.a i'
.-11/ te did u a, i,i tall a pipe "T" with a pipe plug in the branch opening
in the puinp' inhlt hlne. The sketch shows the "T" installed on a Model
II .4 Pacific .lartue Pumper. We can remove the plug and pour in
u atei to prnme rhe pump. And every so often, we run in a little oil to
lubricate lthe tiusde of the pump.
Post Engineers
Yakima Firing Center, Wash.
Dear Yakima Posi Engineers,
Sounds like a good idea to me, and thanks for the picture.



S"'. SPARE LUNETTE
Dear Sgt Dozer,
SWe found ourselves in embarrassing situa-
tions a couple of times when we broke the
lunette on the 10-ton attachment trailer that
goes with our crane. When the lunette broke,
the air brake safety system kept us from hav-
ing a runaway, but we did tie up a narrow
mountain pass for several hours until we got
\\ it Iw anew lunette. Believe me, this didn't make the
local people too happy.
So nou u e mak it a point to carry a spare lunette whenever we're
operating of post It iaves a lot of time and serves as good insurance.
CWO E. B. S.
Ft. Lewis, Wash.
Dear C\O E. B. S..
Can't see anm reason why you shouldn't carry a spare lunette. Your
unit's authorized an extra one, so you're just putting it to good use.


41 J0


3p-,w








A FIX FOR RIX
USE THIS ROD TO BREAK
A little ingenuJi and a housekeeperi -U UP THE ALUMINA
suction &ill lead ou ro. an cai %a\ o2 0 BEFORE YOU
removing the acivated alumina ironi APPL THE
the during roer, on Ith lHij.-PsI RI, 1 VACUUM
capping compressor.
All \ou' t goira do is hborrow, the
\acuum cleaner from the r.id.r section
Irhe 's% got one-a TOE itcmi
But t[rat ir genrld when you're
,1 poking and scraping Thi'll keep [hi
screen at [he borrom ot the r(o\u r from
gtrring damaged.


GET A PIECE OF -'4*IN WATER OR AIR HOSE
AND TAPE IT TO THE END OF THE VACUUM HOSE
THE VACUUM CLEANER HOSE ITSELF IS TOO BIG
TO FIT THE FILLER OPENING

ABOUT ''

S Once ,ou hae the howe rigged. stick
USE A BLUNT ROD. WIRE OR EVEN A MODIFIED it in the opening and turn on the juiLt
COAT HANGER BENT LIKE AN I Man. you'll really hate drag!


IT'S OIL RIGHT
If 'ou've been slumped about what grades of oil to use in the
force feed lubricator of the Rix capping compressor, \ou can rest
easy from here on in. Here these are:
Where the temperature range is 90'F, or lo, er use Lubricat-
ing Oil. Grade 1065. (QNM 1-0-0-02570-065) FSN 9150.255-3929
You'll find this un listed on page U. Index No. 164 of SM-10-1-
9100, Class 9150 11 Nov 5S).
\' here the temperature is 90'F and above tour best bet is to
use Lubricating Oil, Grade 1080, IQM I-140.002582-0081 FSN
9150-231-3929. listed in the same supply) manual, only it'. on
page 6 of Index No. ( .








DON'T LOSE YOUR HEAD


11Fff You'll probably say it'd
never happen-but it could. And you
might not be kidding when you tell a
guy not to lose his head.
It's true enough that crankcase ex-
plosions are rare. There's hardly one
chance in a thousand that your crank-
case'll blow up in your face. Even so,
it might not be a bad idea to pull up a
foot locker and listen to a couple of
safety hints.
Most crankcase explosions happen
when the crankcase cover's opened too
soon after the equipment's shut down.
It's still too hot in there to play it safe.
If you hafta get into the crankcase on
your equipment to correct a mechanical
failure-wait about 15 minutes and give
it a chance to cool off. You'll be avoid-
ing that one chance in a thousand.


A crankcase explosion often happens
like this: A bearing, piston, bushing or
some other part overheats due to some
kind of seizure. And you want to locate
the trouble in a hurry. That's where you
should wait-if you're smart, that is. If
you jerk that cover off too soon, the sud-
den rush of air'll mix with the-crankcase
vapors, combustion'll take place, and
you'll have the crankcase blowing up
right in your face. And it sure wouldn't
be a joking matter to lose your head.
Some manufacturers now put warn-
ing plates on the larger engines to re-
mind you to wait a few minutes before
taking the cover off the crankcase after
the engine's been shut down. On most
models in use today, though, there isn't
any warning plate. So remember, think
before you act



























YOU CAN HANDLE IT
litor, \\e did-until we came up with a fix.
O Ord D38-W21 caused some Ve got hold of some adhesive tape.


headaches around here for awhile.
That's the one which put two small
batteries in place of one big one in the
container on the front bogie of the
90-mm antiaircraft gun.
The larger bartery had a strap across
the top which made nt a snap to lilt it
out of the box.








-r..- .



The smaller ones have no handles. So
we damaged more than one batters and
container trying to remove the juice
producers.


FSN-8135-269-8088 gets you a roll one
inch wide by 60 yards long. Before put-
ting in a new set of batteries, we
wrapped the tape around 'em and
formed a handle at the top. No more
dim looks when you tell someone to
change the batteries.
OCMT Joseph J. Bukowski
Fort Sheridan, III.
t Ed Note-Looki like a good temporary
ix.)


Dear Ed
NMW








BRACKET FIX


Dear Editor.
Here's a quick field fix for some of those Dodge trucks. It can be used when the
accelerator bracket becomes worn out. You can't get a new bracket, because it's
not in the Ord 7 or 8-only in the Ord 9. The fix cures sticky gas pedals and lerk)
acceleration by restoring the bearing surface between the throttle linkage and
bracket.




Remove accelerator bracket by taking off
cotter pins and cap screws that attach it to the
throttle linkage and to the bell housing. Next, dull out the threads of two '-in SAE nuts.



Then, knock pin a
of devis lever end of ,. Pull shaft out of bracket until i slips out of devis
the accelerator shaft. lever and that end of bracket.





Insert the two nuts on shaft and reinsert into 1o
bracket and lever. Drive pin back into original position.





Slide each nut to the opposite ends of the shaft and brase or weld it right to the bracket.
By restoring the linkage bearing surface the bracket'll behave like a new one.
Mr. W. M. Fosbre
Mt. Rainier Ord. Depot, Wash.
(Ed Note-You're right about that bracket not being aa.ldable to second echelon
and to vour Ordnance support outiitl, but that's being changed. Next time a
revision to Ord 8 SNL G"4I hits the field, this bracket nill be in it, nuhich
mean, it'll be at ailable to your Ordnancte iipport. As, 0oon as you get a new
one. get rid ol your patched up bracket.)
45







WRESTLING HOODS










Dear Editor,
When you go to replace the hood-
side-panels on the 21/2-ton Reos and the
5-ton trucks you're in for one heck of a
wrestling bout.
Getting the panel's locking-pins
lined up and inserted into their respec-
tive holes just can't be done unless
.you've got two men on the job.
-You can insert the first pin OK, but
by the time you ease over to the one on
the opposite end of the panel the first
one's slipped out and you're back where
you started;
Reason the job's tough, especially if
the hood frame's been sprung, is the
pins. They interfere with the space you


have for working the panel in place.
You can't line up both ends of the panel
in the hood's frame at the same time.
One end of the heavy panel hangs un-
supported and pulls out the end you've
locked unless someone's around to hold
it in place.
We've eliminated this worrisome in-
terference by cutting off Vs inch from the

FRONT
PIN \






front pin. Now we can line up the panel
on both holes, insert the back pin and
know it'll stay put while we lock the
front end of the panel. Cutting the pin
doesn't weaken its locking power, and:
the fix makes replacing these panels a
one-man job.
one-man job. MSgt R. A.

(Ed Note-You pinned 'er down, Sarge.
You win the bout.)


Dear Editor, ', '
We've been having quite a bit of trouble with our trailer-light-cables drag-
ging along the ground getting banged up when they become disconnected.
Our ea3s fix for this is to attach some safety wire or a light chain to both ends
ol the connections. And just tie the ends of the wire or chain to the truck and
trailer. Now, when the connection wobbles loose, it won't drag.
PFC Bruce Kruger
Camp Irwin, Calif.
(Ed Note-Get a UER in if those cables keep coming loose. That way you'll
soon gel a permanent fix.)



























This gal sure threw you a bum steer,
r back in PS 47 on Page 49. There is one
and only one paint to use on acquisition
antenna radomes. Because other paints
cause radar reflection, the one used-on
radomes has to be non-metallic. Get it
by ordering; Enamel, synthetic, semi-
gloss, OD, (No. 2430, FS TT-C-595), FS
TT-E-529 (Non-metallic), Eng Stock No.
52-3476.017.100.
On Page 49 in PS 47, just delete the
reference to radomes. The paint you
used to get under Ord Stock No. Y004-
8017319 is being replaced by a paint
under Eng Stock No. 52-3433.700.005;
but it isn't used on the radomes-it's just
used for ordinary OD painting around
your systems, but not on your radomes.



Use only IN23B crystals with Nike
Vans and T M33 FCS. IN23's aren't elec-


trically interchangeable, so they're ob-
solete. Turn the IN23's in-according to
regulations.



The acquisition antenna control unit
on the Nike and M33 FCS has been get-
ting OHA (MIL-0-5606) for a lube. But
that stuff doesn't contain a rust inhibitor.
Switch over to OHC (MIL-0-6083A) Stock
No. 14-0-2832-51, which has a built-in
rust fighter.

-delti Otte
Whenever y'go changing a light bulb
in your M48 tank's range finder-first
make sure all those range finder light
switches are OFF. Pulling a lamp assem-
bly with the switches on may cause a
short and shoot the resistors in your
range finder control panel. Wouldn't
want thar, now... would we? (You'll
likely see a range finder decal on the
subject soon.) '











INDEX PS 37-48

IP 15uK NUMNlK 37 3 3 39 |40 41 42
V. MAJOR ITM I PAGE I


row ilMMrr. m n .lo 3* H akllnll
2.9nd I U 12 2 ... M:No
45 46 47 1 4


I


IM igg most allu I


BAS 4 14 a18 114 2M30
COOLING SYSTEM 49 31 9
DO SINE IC 31 IC, 1 Cl- 21 IC
11RCAL 32,47 4 17,19 19,3.35.49 ,343. 217.31 2.49 333437 2 2943.4 920
TOS 29 21 33.48 39 1 446
tOION & 01LS 16 34 8 19.32
,UlJCAT'01 30646 42,49 46 49 40.49 43.44 449 4 A.446 39,40,49 49 18.19
CHANGE R 21 4,6 21 21 41421

pY 30 1C 49 35,49
SIRE,4 W1EELS 17 16 37 49 14,33,49 21 534.49 6 47 17,1834 [8
101S & EIPMENT 18,19,30 48 16,17,19 2.20.35 15.I 49 29,3248 1,4,49 31,36 1
S49 249 31 19


9 4OM A GU 46 2 41 39 3940 3 42 7.47 4
i12I MAMGUN 3246 243 41 46 49 249 17
751MA01 2.41N 2 4 40.41 9 2 7
HO4TZERS & SUXS 32 2 49 38,39 49 38 30
MM TANK 6UNS 32 2 0
9M TANK 6UNS 32 2
S AM GUS 3 238 2 6,4
50 CAL MAWOE 6UNS 2 31 59
30 CAL MACHINE WKiS 245 10 37 40 31
30 CAL BAR. 2 38
30 CAL RfLES 2 39 a 9 3 6
SCAL. 143E 2 42

CAL PISTOL 2 _____
45CALSUBMA. UN 2
RECOHLISS RIFLES 37

ROCKETS 7 LAU8IiERS 46 49 x
S 13 13YST7E 42,43 39,41 32,36 39,48,49 3649 49 32,33 49 2.S6.7

S TS AMlD SCOPES 30 40.45 2 49
IK C 40 37 34, 3536 40,41 34.35 443,44,45 12
R CLEA4ERS_ 44
GMERATORS 34.36 a
GRADER 63 4
GSOIE E S 44 41.42 42 42


SACTOC S DE0 S 3 45 46 4244 41,42.44 43,44
s u RLY A N2 4 2
S PAMT S
STHE RO P,P 36,38 42 434 44 404 444 45 45 4041

CLUTCHES 37
C R M SlWELS 45 44 44 66 a 38 45
SE 14ASAL CH E 33 35
OMER MAIIEIIANCE
S34 40 45 42


FLAlE THOEROW 39
SO- KE GENERATOR 39
IMEN I 4C 1 HFATER 40
Irl.D 4am -I











THE FIRST NUMBER IS THE PS ISSUE. THE SECOND NUMBER IS THE PAGE NUMBER.


'~ I .mt I M#1U 04


40398, 428 I443438 =84


GUN CARRIGES 4031 38-26 39-184630 3-21 3747,4039 4649

PERSONNEL CARRIERS 4031 3&26.46-2 39.18 321,4130 4039 4649, 433
46-17 4349,462
48-21

TANK--M46, M4EAI 3S41,3849 42-31 3826,4349 41-12 39-18,4249 3821,4119 3747,39-2 41-49,4649
4568 4349,421 4039,4339
47-16,47-32


TANK-M47 3841.3849 4031 3826,3949 41-12 3839,39,18 3821,41-19 3747,39-2 37-30,4149
4349 3940,4249 4349,4321 4039,4339 4649
458, 463 4716,47-32

TANK-M48 3841,3849 4631 4146 38-26,4349 41-12,47-12 37.183731 3821,41-19 3&31,41-20 3747,340 37-2,4047 3818
2 47-16 45-7 4W-20 3&19,6389 4120,4349 3K9, 4039 4149,4249
3918,4249 48-21 439,47.16 4333,4531
454 47-32 4649,47.14
4831


TANK-M41M41 A 3849 4031 38 26,41.48 41-12 37-17,434 39-1824249 321,41-19 41-20 3747,39-2 4149,4649 38-s
4349 458 4349,4-21 409,439
47-16,47-32


TANK-M42 (SP) 3849 4431 3826 39-18,4249 3-21,41-19 41-20 37-,3747 4149 3818
458 4349.,421 392,4 39
439,4716


WRECKER-M74 4031 38-26 39E18,45 3-21,4349 4645 3747,4-39
4821 47-32


DIV. MAJOR ITEM 4-Es9444s 0o4 B ca444s mAN 4c 9m 449 494 4l4ul *ua


TRUCKaSM320 383A 443354049 4249,44-9 41-IC,41-33 40-17,432 4436 3820,4047 4437,4748 41-35.4534 3719,4145 4535 39-39,4017
.7TON 41-14,41-34 4220,47-19 41-32,44-36 4748 4220 4343 4049,41-21
4148,4549 46-20 4437
47-1847-19
4848

TRUCK-741 SERIES 4-5,4114 38-19, 39-14,41-11 4017 38-20,4047 4749 37-19,4520 3939,4017
%-TO 4549.4846 41-16 4438 41-21

TRUCKS 749 SERIES 37-19,40-18 38-19 416,4149 4-17.4330 384204047 45 47 4-34 37-19,4019 39-39,4017
2WTON GMCS 403,.41-14 4-12. 4449 40-21,41-11 4121
4148,4229 4536 452,4437
44-384547 47-17
4549,4619
4649,446

S TRUCKS-67423ERIE 4-35,41-14 38-19,4532 41-13 4127,43- 39.Z04047 37-19,4829 3714,3719 37-19 3939,40-17
S 2 K-TON REO1S 41-17,4148 4620 41-12,4536 3847,4145 4121
ST3DEB4AKERS 4229,4438 45-20,47-17
4547,4549
46-19,4M8
4649,4746
4846

TRUCKS-G744 SERIES 4035,41-14 38-19,3948 4116 3849,39.20 38-20,4047 4846 37-19,3849 339.417 3747,3847
5TON M62 4133,4148 3949,4017 41-12 4033,4145 41.21,484 39-18,3920
4347,45-18 44-35 4230,45-14 3938
45-19,4549 4532,47-17
4486 48-18

TRAILERS, TRACTORS 3843 44-34,4830 4349 4-32 3719,4145 4121

COMMERCAL 4146,4648 \ 39,41-21


DIV. MAJOR ITEM


















IT' SYSTEM...




F FASTACTION (AND BETTER OP0RATIO,
AND MAINTENANCE OF YOUR EQUIPMENT
,inside :-Requisiftont c r)
, IT A NEW SYSTEM...
,IT.S A NEW SYSTEM.: .. '-- ..