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GO60TTA GET THESE
THE PREVEIIVN MAINHENANMCE MONrrL
Issue No 173 1967 5eliso
IN THIS ISSUE
That's right take it easy. Take it easy with your Army equipment.
A lot of -oldier- are real lear Iring \
up their -luff like Iruck-. d./er-.
earihionoer-, carrier generatlor-. ,
They're Itring to make liInm III
thing- the equipmi l11il "a- iie'.r de-
signed il do. like-
R- :W.I --- V I 'a
-. i-al- a f -'
- A forklift
Ir ing to lift
a load meant for
a big crane.
MIO.MI9SPH o. 217 )M16Il Rlle 20
M728 CLV 18 M2A 81-MM Mrloar 21
D04 Form 2?8 11 M22 Subystea 21
Mli LfniL 19
MOAI J 6 MM Rdil 19
AIR MOBILITY 22-28
UH IC 2223 Parting Poop 26
DA om 2407 23 OH- 3 27
S8 24-2 Addlln.e oll 21
GROUND MOBILITY 37-47
2A lon lik 37 Ilre Removel Tip 42
Radialao Cap 38 39 M3 Heale 43
FM 53 40 M60AI 4445
MI5IAI 40 Xenon Searclighl 45,60
Tie Cage 41 MII3 MJ 3AI 46
Taesl Sl 41 M42A2 48
M8 YIR 46,47
A IrPRC-6 .8 IA311PI.IA-43 51
10 -25 4149 Grounding Battees 52
1n 524 50 Staligll Scooe 53
trying to Smoe e it e K
a mountain tO' Tso MTOEs 54p57
what your gear will do. ReadA Ilethe loads
at on e aa plae o in t T qlnA's
60 Ton Crone 62n
MAn Ssd engine 62
Stuff like that will bust them up
every time. So, take it easy. Know Use 1 Iad for p
what your gear will do. Read the load Depoartmnds a. tar
limits on the data plate or in the TM. quiriments submit
And stay within the limits. Then your
equipment will be around to work
for you another day.
HuberWarco Gradle 2
M17 Mas1 63
TRIO rector 63
2. 37.41J, 43.46
t ill Ift ll public.
nod by Hoadqartersn.
Vy. 19 Febirry 1965.
accordance with re-
ed on DA Form 124.
Syz 44a LuI
Could pill 41111 I I()kJxa
Sure, they can scoot like nobody's business, but it's how they shoot that makes
them big ground-gainers for Uncle.
This "consolidated" inspection-PM guide will help keep your weapon hitting
paydirt. Use it when pulling your dailies, weeklies, and quarterlies-any time
you're at a halt.
These 2 vehicles have about the same carriage, but from there up they're distant
cousins, at best. So, be on your toes when you roam through these pages that you
don't board the wrong deck by mistake.
CANNON TUBES (M108 M108
and M109) Lands
raised, chipped, corrod-
ed, dirty, powder-fouled. M109
Keep dose tabs on your tube s wear
and tear by jotting down the EC (Equiv-
alent Full Charge) rating in column g
of its DA Form 2408-4 regularly after
every firing session. If you ever have
any doubt about the tube's service-
ability, get your support guys to give it
a borescope and pullover gage reading
on the M108 and 126E1 cannon.
RING LOCK (M108) -
Lock loose, dirty, pow-
der-fouled; key, 'ock
and screw damaged
MUZZLE BRAKE (M109)
' -Loose; key lock or
screw missing; threads
MUZZLE PLUG (M108 and M109)--Plug damaged, missing, torn, painted.
CHAMBER EVACUATOR (M108 and M109) \ M18
- Evacuator dented, dirty, powder-foul- .
ed; drain plug (on M109 only) loose, miss-
ing, strip-threaded; stress band loose
(stress band only on solid-type evacuator,
not on welded type); key missing, dam-
aged; key retaining screw strip-threaded,
burred; piston valves frozen (won't move
freely); valve cap threads damaged; re-
taining washer broken, missing; lug ---
broken or improperly locked MI09
TRAVEL LOCK (MI08 and M 109) Han.
die adjusted wrong. bent, damaged.
locknut missing; band lining missing,
worn, broken, frayed; lock slop busted,
missing, adjusted wrong (there should
be no play in the tube), stowage lock
OFFSET PERISCOPE COVER (M109 only)
- Cover bent, missing; retaining pin
busted, missing; periscope window
broken, cracked, painted over, foggy;
quick release pin missing, broken, won't
Breech Mechanism Assembly (M108 only)
CLOSING SPRING ADJUSTOR EXTRACTORS- Nicked, povw
- Cover dented, loose, miss- aer-louied, Durred, plunger
ing, retainer ring busted, miss damaged, won't push in easy;
ing; adjuslor damaged: pin spring weak,bent;guide worn,
loose, worn, missing, spring missing; exlractor lugs loose
leal weak, damaged or worn
HANDLE Unlalcning plun-
ger damaged, plunger spring
weak; latch spring pin badly
worn; handle bent; closing
latch loose, clutch spring
bent, weak- spring pin miss
CRANK Brackel chipped-
detenis missing, loose; pivot
burred, nicked scratched:
crank chipped, burred
REASSEMBL ING- SE
SURE ',1O GET THE
LEFT ANP RIGHT
ONE WHERE THEV
1 BELONG. ,
Breechblock Group (M108 only)
FIRING TRIGGER-- You'll find the cored procedure spelled
Nicked, burred; install- out on page 413 of TM 9.2350.217-10 -EEP
ed wrong. r -. .
LANYARD Rope fray.
ed, cut; handle painted
The MI08 takes lonyard FSN 1
1381 1109136071 with handle (1I
which is found in the -20P manu
the M109 takes lanyard FSN 1025-
(60067801 with stop hook and han
is found in the -10 TM
FIRING SOLENOID GROUP
- Mount damaged, loose,
solenoid denied, lead wire
cut, fraved; clamps missing.
busied; solenoid contact
disc loose needs adjusting:
safety lever chipped, bent
loose; mounting bolt wire
COCKING MECHANISM -
Bushing damaged, burred,
lock pin badly worn miss
ing retractor nicked, burr.
ed. bent, spring pin miss-
ing, badly worn
600 6780 Spring retainer nicked,
die wh lch burred: firing spring weak,
retaining rings missing,
damaged: Ining pin powder
fouled, point blunted: re.
SLIDING SHAFT AND FRAME tracting spring weak, kink.
GROUP- Contact plunger ed; stop nicked, burred.
shoe bent. pin missing, guide dented, nicked, worn.
worn; shalt bent; sleeve, burred, straight pin badly
spring retainer. guide block worn, missing
and sleeve bearing dirty,
damaged, missing, nuts
Irame bent; mounting bolts
EJECTOR CAM AND
BRACKET Cam and
bracket pitted, pin set-
screw loose; mounting
screws loose, lock
wires busted, missing
GEAR- Gears chip-
ped. nicked, burred,
dirty; mounting bolts
loose: lockwires bust-
EQUIUBRATOR Upper and lower
support mounting nuts loose; lower
nut lockwires (4) loose, missing;
cotter pin missing, busied in upper
sleeve connection, spring dam.
aged. sleeve rusty, dry painted
AND HOLDERS Pul
leys damaged; holders
busted. Replacing a
pulley is a lob tor your
tape broken (a light pull
will tell you); lube level
too low (see Fig 10 in
the LO for tape reading
instructions and Fig 96
ofyour-10 TM for scoop
on filling and bleeding).
FER -Oil level low
(oil should be even
with plug level when
weapon's at zero de.
ELEVATING MECHANISM Handwheels
turn hard, excessive backlash; wheels
pitted, round nuts loose; knob chipped.
knob shaft spring pin loose, missing
II either wheel backlashes more than
1/6-turn, report it to Ord support.
(1/6 turn- That's about 10 minutes on
the lace ol a clock )
turns hard, has excessive backlash; me
chanism housing pitted, round nut loose;
knob chipped; knob shaft spring pin
.. .. Q f "- .
,. ; o .. .. .- ,; :.. :. ..'' '. .. "
... ...,; ,. . ,,.. ,% .. .. _
,:-,=L: z ';'' ,' ',"-., "; "W .:-. -'",, ;" : "'[: ";"", ,;"- .. '"
M139 Howitzer Mount (M108 only)
OPERATING HANDLE ASSEM-
BLY Plunger and spring
weak, broken; pin loose (falls OF
out); clutch assembly spring SE
weak, won't disengage. be
GAS CHECK PAD CL
Damaged, worn, burnt. CI
Hey, if your gas pad's
dated March 1963 or earlier,
replace it first chance you
get with one made after that
date. FSN 1025.994-4246
gets em The older pads
have rubber in em that
could swell up -make it
lough opening or closing the
SPLIT RINGS -Pited, 0 |
/ AN F5N
Breech Mechanism I Assembly (M109 only)
ATOR GEAR Teeth
(Clean up with tile.)
CAM ROLLER Bent,
CARRIER PLUNGER -
LOSING SPRINGS Weak, broken, Damaged burred, bad
need adjusting. ly worn
You'll know something's wrong with
the leal springs il the breechblock closes
sluggishly Incidentally, this leaf spring CARRIER RACK COVER
IFSN 1025-861 1479) is now authorized PLATE Screws and
to the organizational maintenance level hex heads loose, strip-
Changes to your 20 and -25P manuals ped
call for eight leaf springs being author-
ized per 15 day level for each 6 weap ADJUSTOR -
ons supported i __ Needs
FIRING MECHANISM BLOCK ASSEM-
BLY Won I operate smoothly; knob
cracked, broken; pin missing, worn,
follower spring weak, broken tollower
shalt and roller nicked, burred: screw
damaged; carrier lugs broken, worn so
bad they let the ring mechanism lurn;
firing pin damaged, broken rusty; firing
pin retainer bent, missing
Keep a thumb on the retainer when
you're removing the firing pin This re
lainer's under pressure and could hurt
you Il it Illes at you
M35 FIRING MECHANISM Won t work, compression springs weak. won't cock and
ire, hammer guide yoke burred, corroded, hammer sear spring missing, put in upside
down; hammer operating sear installed backwards (see Fig 123 in your 10 TM): ham
mer and cap burred, corroded, carboned up
%'. .W .i .-. N. '
S "%, .- -. .-' V,: .: ".'.. ." -,:. t?", "" *
RECUPERATOR Indicator pin CRADLE CAM Ad-
sticks out more than %-in; leaks lusted wrong. See Figs
around piston rods; piston rod lock- 335 and 336 in your
ing nut loose; cotter pin missing. .20 TM for correct ad-
(You have to remove or open the lustment. Just don't
cover to check the front recupera. forget that you need
tor and piston indicator pins.) both a vertical and a
REPLENISHER Leaks; tape bro-
ken (pull it lightly to check this); oil
level too low. (See Fig 13 ol your
LO for the tape reading indicators.)
FINALLY IN THE
Leaks in hydraulic lines from CRADLE CAM GROOVES
the buffer to the replenisher. -Burred (These grooves
(Page 17 of the LO has bleed can get hurt bad if the
and fill procedures on this, cradle cam's not adjusted
SSTOWED POSITION-Hydraulic leaks: flex
bible lines frayed, swivel joints leak, bind,
don't turn freely; machined surfaces cor-
roded, rusty, dirty (if unpainted).
Handles won't lock securely; won't re.
lease properly; rammer head not fully
retracted: counterbalance cable worn.
frayed, rusty: electrical wiring and harness
They can be painted, though, since they're
not bearing surfaces, if your (0 wants it that
way Paint will control rust and corrosion
. 110 ...
:': "~ .. .i : :" .
..~ ,. -- r .,
::` "- ~ i- ` : .. :' ,: ... ",. ., ,',-." .
or ~r r wa
VARIABLE RECOIL CYLIN-
DERS Leak. (See page 17
of the LO for bleed and fill
SPADES (M109 only)
- Won't emplace or
stow easy; spade lace
burred; welds cracked,
chains, cables, pins
and springs missing.
EQUILIBRATOR Leaks in hydrau (Late pioducion only) Some vehicles
lic lines from equilibrator to reser. incorpoiole a combination equilibia-
voir and accumulator; hand pump lor/elevoting mechanism connected to
leaks; equilibrator improperly ad. a reservoir, hand pump and accumulaior
ousted lor existing ground or by interconneting oil lines (heck this
temperature levels. version for hydraulic line leakage
Doublecheck the operation of the circuit and rammer control (Think) box by listening for these
3 dicks (when you have the master switch and cab power switch ON, of course):
1. When you lower the
rammer into firing pa
sition and the hinged
loading tray is fully
extended. This click'll
be caused by the
3. When you pivot the
rammer cylinder into
ramming position. This
click'll be caused by
the microswitch locat-
ed under the rammer
tray making contact.
By the way, while you have it in the loading position, check these, coo:
TRAY-Painted, rusty, dirty. RAMMER INDICATOR -Not RAMMING POSITION-Ram
bent,damaged; screws loose, adjusted right (Fig 94 in mer piston rods (3) leak,
missing; rammer release your 10 TM says how you damaged, nicked, burred,
latch not adjusted right (See do it.) r rusty, rammer cylinder leaks
Figs 59 thru 62 in your -10 around seal and piston rod
TM for the poop) I
nitrogen pressure; connec-
tors loose, leaking, dam.
aged; sight gage control
valve broken or won't work
(this'll give you a false read-
ing, so walch it!)
With the oil drained from the
accumulator, the nitrogen press.
sure should be between 500
and 550 PSI The accumulator
pressure switch should auto-
matically control the hydraulic
pressure between 925 and
It s a good idea to leave the
sight gage control valve in the
goge' position all the time
you re operating the vehicle.
HYDRAULIC POWER PACK RESERVOIR
- Hydraulic leaks; retaining band loose;
bolts and nuts loose; oil level in reser
Use either the hydraulic power pack sight
gage or dipstick to check oil level. It should
be level to the full after pumping' mark.
However, the accumulator fluid pressure must
be between 925 and 1775 PSI before you
take the reading or you'll get a phony read.
Elevating and Traversing Mechanisms
(M109 only) ./T
VERVE SQUEAKY, LUE
2. When you pivot the
rammer cylinder away
from slamming posi
tron This click'll be
caused by the micro
switch under the front
rammer cylinder hinge
TRAVERSING (MANUAL)- Power Man.
ual or Hi Lo selector control lever won't
work: bolt worn, loose, strike worn,
loose: selector level trigger won t re-
lease (spring busied); shaft twisted;
fork setscrews loose, missing; exces
sive backlash on handwheel (1/6-turn
is OK, though); handwheel squeaks.
rustv; weapon won't traverse smoothly
(bindsl; Iraversing gear housing leaks.
lines and fittings leak, gear case oil
level low (check by removing the plug).
base ring dirty; gears chipped, nicked,
burred, rusty, gooked up
Reminder Shift from manual to power (or power to manual) real easy lust liggle the handle so
gears will mesh
AMMO RACKS (both M108 and M109)- Latches, spring, chains, straps, safety wires,
etc damaged, broken, missing.
ELEVATING (MANUAL)- Hand pump
knob loose, cracked, won't turn easy:
backlash; manual accumulator leaks, -
ELEVATING (POWER)- Won't elevate
smoothly; creeps when power handle's
in neutral; elevating cylinder leaks, rod
damaged, rusty, corroded, hydraulic
lines and fittings loose, leak; lines bent
TRAVERSING (POWER)-Magnetic brake
actuator won't work; indicator light (red)
won't go on; main toggle switch out of
order, busted. toggle switch to assistant
gunner control won't work
PITCH LEVEL, QUAD-
Cracked, b-oken, hard
to read; loosely mount
ed; covers busted, lit
too loose or too tight
(won't turn freely or
hold at open or closed
positions): level vial
bubble not centered
GENERAL APPEARANCE- Mount bracket
screws and lockwashers loose; body and
parts dirty, rusty, paint chipped; mount-
ing surfaces burred.
INDEXES-Hard to read,
or sticks: parts
linkage not adjust
ed ri ht
TION)-Cracked, bust. ELEVATION HANDWHEEL
ed, bind; not adjusted; Cracked, busted; limit
show backlash. stop spring damaged; ele-
vation mechanism needs
COUNTERS (ELEVATION AND CORRECT
TION)-C-acked. dirty, condensation.
hard to read, digits won't line up right.
ELECTRICAL PARTS Lamps burned
out; lenses cracked, chipped, broken;
electrical parts and wiring damaged
RECORDS AND FORMS-Torn. missing, made out wrong, not hllcd
complerelk according to instructions in TM 38-"50 IJul 6-11 /2 changes.
PARTS AND ACCESSORIES- Missing, dir,,. broken. Your TM'-, will
tell you what )ou should ha'e. If anything's missing, get )our requsnitions
in on the double
wrong; telescope keys
not engaged in mount
keyways: ways burred.
dirty: clevises (2) on
telescope busted, not
latched to M145 mount
CLES AND CONTACTS
- Contact pins bent,
connectors loose, wir-
ing insulation Irayed
ELBOW ASSEMBLY -
Chipped, dented, won't
rotate easy both ways;
valve assembly defec-
tive; valve cap loose,
out; won't light when
loggle switch is on.
KNOBS RETICLEE RHEO-
STAT. LIGHT PROJEC-
TOR RHEOSTAT. DE
AID, ELEVATION. RESET)
- Won't work rignt;
backlash; broken, loose.
'I THINK 1
O E AAIN
TION, AZIMUTH, RE-
EYEPIECE ASSEMBLY Won't work right; dig-
- Glass dirty, scratch ils don't line up; stops
ed, smeared, cracked; set wrong.
image out ol locus.
water or condensation
visible through eye-
E EYESHIELD-Cut, torn,
PLIBLICATIONS-Missing, torn, not up-to-dar. hard to read, wrong
ones. These are rhe ones )ou should hac. TM 9-235021"'-10 INo% 6(4
% /changes I and 2; TM 9.2350-21--20 (Jan 65) a /change I; TM 9 2350.
21.25P/ I (Jan 65) /changes I and 2; TM. 9235021-"25P/2 INov 64)
-M109 onl); TM 9-2350-21-.ESC/I (Aug 6-1 a/changes I and 2-
MIOSonl. TM 9-2350-21"-ESC/2 (Aug 6-41 /changes 1. 2 and 3-MI 109
only; LO 9-2350-21'. 12 INov 6-) % /Changes I and 2.
HAND LIGHT- Won't
work; cable frayed,
-Busted; won't turn
range; won't change
readings correctly on
glass cracked, scratch
ed; markings hard to
see; bubbles divided;
level vial bubble not
centered within one
MI AND MIAI GUNNER'S QUADRANT-
Frame bent; elevation scale loose, hard
to read, damaged; level vial loose, dirty,
cracked; bubble divided; micrometer ad-
justing knob cracked, loose, won't turn
and hold light
M42 OFFSET PERISCOPE I--
(M109 only) Mounting 1-
screws loose, missing:
window dirty. cracked, .
fogged dowel pins bent.
hlirrorfi nn AnrL //
LAMPS Won't light
when toggle switch is
LE SELECTION GENERAL APPEARANCE-Eyepiece arm
-Lever busted, and main housing dented, scratched;
.ala eeght of 'em, too), mounting surfaces
engage detents. mounting screws loose, missing (check
all eight of 'em too), mounting surfaces
ber shield crack.
ed, brittle; lens
ed, dirty, fogged
edup, dirty, foggvered with LEVEL VIAL MIRROR -
up, covered with
fungus. Busted, cracked.
LEVEL VIAL-Tube bro-
LIGHT CONTROL KNOB ken, cracked, loose;
(RHEOSTATI--Knob busted, scale hard to read.
cracked; won't light lamps;
won't change light intensity CANT CORRECTION
as knob's turned; no posi- ICROSSLEVELI KNOB
live action at the end of the Broken, cracked;
range wnn't wnrk rilht
LAMP COVER Miss
ing, busted: chain bro- CHECK
ken, not attached / -o
M146 TELESCOPE MOUNT IT206)-
Mounting screws loose; mounting sur-
faces corroded, rusty; tapered king pin
loose, worn, chain busted, missing;
cable loose, frayed; grounding wire
loose, busted, connector arm, yoke and
elevation bracket nicked, burred; elec-
trical connector damaged: elevation
slide cover loose, broken, elevation and
deflection (azimuth) knobs busted, won't
turn and hold right
'ReWSOL back M kftIsgpod-through Aug 1966. Make sulre your howitzer
hiti &,' r ~CaMing1
MWO Number Dated Priority Echelon SP Applicable MWO Title
9,S20-20/1 21 Apr65 N 2 Bot ; ntnifo ohfPbe3
I I I I I teleicepe (11) stowqbo
bo I Wo w.
494150-21740/2 119Nui5 N i 2 olah he-shapng radiu~rd
I fitell cop aq ver ]oddphL
A94350-217-20/3 7Apr65 N 1 2 11 2` ou If !Installationafr nmrom
I I soleoidp(ungergqurda
9-A6lO0-21 A 0/1 .25 Nv, fi I N 3 B olth i Relacatioaof tosiwca&
:9-*4117.12 1 3 t65 N 1 3 1Bo0h Intoolhifl n hilgii
? :kl*.a dior for rmommmife s
9-235@4*l~~~~~~flh3MO c2iq~ ld ntliovefir R
I1 I I- -I bhead~luitmouiing.
i-S0-W217430/2/21 4Au66 N 3 11109 only- I Providing water drmin
I I holein cadle.
move easy Irom
stop to stop; plun-
CLES AND CONTACTS
- Contact pins bent,
loose; contacts dirty,
OK., then here's a bit of good news
that changes some of the written word
on the precautions and steps taken dur-
ing ring of the 165-MM gun on sour
Starr with the Preliminary Step "'
Fig 2-62, in TM 9-2350-222-10 (Aug
651. The Note info after Item gets
changed. like so:
e e c a s
be viual ispce an an de
brisiWfoundS inSSthSe tube removed
pro to lodn t. e nex rond
AMMO PUBS CHECK
DA Form 2028, Recommended Changes to DA Publications, is OK for report-
ing errors in publications covering missile ammo, components, and explosives.
But, for correcting publications on nuclear weapons and conventional ammo
you use DA Form 2415, Ammunition Condition Report, like it says in para
5-6k, Change 2, TM 38-750.
Forms correcting classified pubs, of course, you handle like it says in para
1-10 and para 5-5, in TM 38-750.
:^:- -** y. .: .
'.. .. .. ".'' '.
Now. so's to be consistent with para
4-51 (g), page 4.-q of the -10 TM, here's
the wa. to change item (g) to read:
During firing acriitcies, there is no
requirement to clean out the complete
gun tube one end t'other just
nulf so the round'll chamber.
This lalert word on firing poop is
TT 38248 (No% 66) from the U. S.
Arms' We-apons Command.
BATTERY CELLS MUST
M12 IBE REMOVED FROM
M37 INSTRUMENT LIGHTS
M38 AND PLACED IN
M19, PLACING LIGHIS
Hey, Gunner, open the
breechblock of your M40-
Al 106-MM recoilless rifle
a minute and see that it's
got the right trigger on it,
If the sear end of the
trigger looks like this,
fine Its OK
But if it s been ma
chained to look like this.
gel your armorer to re
place it pionto FSN 1015
300 5390 will fetch the
These oldies could cause odd things to happen ... like the rifle firing off when
you close the breech.
MAKE THIS YOUR SOP...
No sweat, y'say, getting rid of a barrelful of water after fording a stream or
rice paddy? Just point the muzzle down and let it drain, y'say?
Don't bet your life on it! Not with a rifle with a bore as small as the XM16EL's!
Here's why: Surface tension of the water and capillary traction in a small
area like this makes it hard to get water out. If enough stays in there and you
fire off-Bang! There goes another barrel-and maybe a chunk of you.
Water could triple the pressure in the bore when the weapon's fired.
So, make this your own personal SOP every time you drag out of the drink or
fight in a heavy rain in Charleyland. Before you fire that weapon:
i I ,
1. Point the muzzle down and
let the water drain out.
2. Pull the charging handle
back a mite.
3. Press the forward assist to
make sure the round is
seated in the chamber and
the bolt is lodced.
WATER... MORTAR... UGH!
(VC ^ NEiATIVE...THE Y'RE
MORTAR( OURS... IT'S WATER
IN THE TUBE.
No rhyme or reason for a short round with the M29-series 81-MM mortar-
even in monsoon and rice paddy country-if you remember 2 important things:
1. Keep your ammo dry-espedally the pro-
pellent and ignition system-by keeping 2. Dry out the tube every time it gets doused.
it covered with a tarp or some-such and
up out of the wet.
Paras 70 and 58b(l) of your TM 9-3064 (Aug 57) w/3 Changes will clue you.
ARE YOUR BATTERIES-
l ERl AS YOU SAY-
Oui, never get caught short of CIPEL batteries for your M22 subsystem's
wire-guided missiles. Check the expiration date on every battery on your shelf
and order replacements (FSN 6135-884-7897) at least 4 months before they run
out ... so's they'll have plenty of time to get with you. And, remember, never
use any battery that's passed its expiration date unless it checks out OK (registers
12 to 15 volts) on your GM battery tester.
3/4" PART THIS PROVES ONCE AGAIN .
THAT WHEN BETTER MOUSE
STRAPS ARE MAPE/ AIRCRAFT <
MECHANICS WILL MAKE THEM.
THIS TOOL 15 AN IMPROVEMENT Wha 'hoppin?
ON THE ONE 5UG6ESTED IN That's what the engineer-types at
A PS 165, PAGE 38. GOOP SHOW! AVCOM want to find out when you
Fire off an EIR on an engine component.
/To help them come up with the
answer, which can lead to improved
T equipment, they need more poop in
/" DIA L the remarks column, block 35 of the
S HINGE PIN DIA PIN DA Form 2407. Namely-when you
1" iIl/ list the serial number of the failed part,
P- I- I- I also include the engine serial number.
S |- ] [ Also, be sure that you list the air-
/ O, Ec craft serial number in block 2-if
WING NUT ROD END OLT available.
Our TI's have us in a spin over what they call "unauthorized modifications"
to our Seminole (U-8) prop spinners.
First, we ordered a new modified spinner bulkhead, FSN 1610-525-2036,
P/N D 1414-7, which came with a 4-in wide reinforcing band to stop bulkhead
But, to put our old spinner, FSN 1610-624-6855, P/N D1367-2, on this new
bulkhead we need to drill holes in the spinner to take care of additional re-
Also, our spinners have a doubler, riveted to the inside around the cut-out
area for the blade shank, to keep the spinner from cracking where the anti-ice
tubes are fastened to it.
Can you square us with our Tl's by citing some authority for these spinner
changes?W2 L. N. W
ICW2 L. N. W.
Dear Mr. L. N. W.,
You won't find any written word
for modifying the D 367-2 spinner
assembly to make it fit the D1414-7
bulkhead but your CO can authorize
the spinner hole drilling. To make this
fix you need to pick up the hole location
on the bulkhead then drill the required
holes in the spinner for the additional
Instructions for reinforcing blade
cut-outs by adding doublers was in the
old TB AVN 23-5-1 (Mar 60) UR
Digest, on Accessories and Systems.
Some new spinners were also delivered
with doublers, P/N C1411, in them-
so they're authorized.
A new, stronger spinner and bulk-
head assembly, P/N 836-21S, is in the
works ... one that should end this
"tired metal" problem that has always
been with us.
Oil keeps the wheels turn-
ing-if the right amount gets
to the right places.
Take the No. 2, No. 3 and
No. 4 main bearings in your
Huey (UH-1) T-53 engine. If
the oil filter or 2 oil strainers
get dogged, the oil fow to the
turbine wheel bearings is go-
ing to be reduced and you may
wind up with overheated bear-
ings. You know what that
means ... seized bearings and
(ugh!) a kaput engine.
Small wonder Ch I (5 Aug
66) to TM 55-1520-210-
20PMI and TM 55-1520-211-
20PMI now calls for the more
frequent cleaning of the filter
All the cleaning poop for
the filter and strainers is right
in the Huey organizational
We've had just a little bit of trouble locating
the stock number for the new lusterless olive drab
paint called for in Change 5 (8 Feb 66) to TB AVN
7 on painting and marking of aircraft.
Every time we make a local
purchase for touch-up
paint we get a different
shade... makes a
bird look like a
Dear Sergeant B. W. C..
No sweat! The paint you need is listed on Page 19 of Fed Cat C8000-IL-A
(1 Jan 66) like so-lusterless, acrylic, nitrocellulose type, olive drab, shade
X34087, MIL-L-19538. FSN 8010-082-2479 will get you the 1-qt can and FSN
8010-913-8743 will get you the 1-gal can.
You'll also need black lusterless acrylic lacquer for lettering, which means
you want shade 37038. FSN 8010-527-2884 handles the 1-gal cans.
FSN 8010-082-2479 FSN 8010-913-8743 FSN 8010-527-2884 FSN 8010-530-6387
1 OT. 1 GAL 1 GAL I GAL
Also listed is-yellow lusterless acrylic lacquer, shade 33538, for caution
markings. FSN 8010-530-6387 gets you 1-gal cans.
-RAVEN BEARING .
MUST BE A
The only way to check for wear on the Raven (OH-23) tail
rotor pitch change link rod end bearings is by hand-checking
the free play.
The trouble with this method is that everybody has a different
idea of how much free play is OK. A more accurate way of
measuring is needed. Tell me, Windy, are there any limits
in the works?
MSG G. H.
Dear Sergeant G. H.,
You must have a crystal ball or something ... the Aviation Command has just
come up with these limits, which will go into TM 55-1520-206-20: side (axial)
play, 0.022-in maximum; end (radial) play, 0.005-in maximum.
SPlay it safe on a cross-country stop
when you're offered MIL-L-6082B,
Grade 1100, oil with cyclohexanone
THANKS, additive in it-take it on a one-time,
BUT I'D OIL emergency basis only. You want plain
RATHER FLY MIL-L-6082 or the new MIL-L-22851
THAN SoJPi oil. That additive can put the hex on
SWITCH. ADTIWE your bird for real by loosening engine
BEAT THAT BROKEN-BACK BIT
Poor lifting and slinging practices can make junk of a cargo truck or van.
Hoisting by the wrong suspension points can buckle a frame badly.
Transportability manuals like TM 55-2320-209-10-1 or TM 55-2320-211-
10-1, cover shipping instructions-but not lifting techniques.
For proper slinging and lifting methods see TB 9-210/1 (Jul 59) and its
Change 1 (Dec 59).
A I o Ad F .Woo pobsIoo
16 h Om ai* io
of olo6 I 0o.1 fie P.
1-.. F.ooo Ad=m.G =oP
I-r DA P-. i1" -od Chl.
(340d I )od DA P. 310-6 .d I
(I 01 66,.
N 1-01164. Sop. ON 6
T143-14.201 I IS. Aog N&I..-n.
TM E4120.210.1II. 01. P-&g.
IHoat Ak C..dIh o.
TM 5-4120-217.TSP. 014. PoLog Al
TM 5-4310-21 4-25P. o.. N11.-
tEl.44- I.P. A., C.l.ru.
71 S-6121-206-2IP,014. 111-l..
H~o-H. Iop M.I..o.oD Io-Po
T 9.1190-105-41. D. How..oI.Jo.
TM 9-14302 501 I5/9/2. 0 .
In 9-4430-510-l1ISP. N.. Ho-L
TM 9_-1440375-12F/I. Od. ?onkl".
IM 9.145"073-12P/. O. P.,hl.
TM 9_I SW-2M20/3.Oc.I. T.,.I
TM 9-2230-255-14. N-. 5.M-Ho.
TM 9-d92-305-P/. ad. Io.gpo
TM,..4933-.206-1 Pl/2/I No.
TM 9-6 -Fi. 01N. M..II
9M 9.4935 CiS. N. 4o01i5F
TM "943303.-I, SFI. N-. H-.
TM 9-4925-154.1 SF1. N.. H.1.
TM 96920-213-IS, Od. 0-1. lobn.
TM 9-69M-221.13. ad. 144 T-. ,
TM 9-6920-310-12P. No. h.1.o-.
TM 9.69-31 243F. ad. 5o .-..
TM 10-1670-1. NH..oo L- L .oS..
All A.i.oI D.11-y bpIp.
S10-670-234-23 S. U ro .
TM 9-.300.24-BSC/7, Nov. MI06A1
TM 9-23004-t4-ISCJI No., M877
TM 9-2I00-224-USC/10 D0,
MII SA 1I S Mor.
TM 9.SS-I -218-4C. Nol MIII,
M1SIA1 Ton Tr.cL
% I- 7ak.
TM C9-52I644-CUI, D. 13711
TM 9-132-344-EC/2, Doe. Md311
MODIRCATION WOI OCDIU
MWO 9-I005-224-0/2. Dc. M60
Mdil6 O0n. Mil22l M l.
MWO 9.1100O-00-20/1, De.
MWO O-1220-203-30/, Now, M60.
SMWO 2300-216-20/9, D. 1107MI
On., MI 10 Howt.
g MWO 9-2350-217-30/12, Do.. M109
SMWO 55-1.50-204-30/1, J.. OV.l
l MWO 55.-1 0-104-34/10. Nov.
F145 MWO 5S-1520209-30/27. Jan.
MWO 55-1120-211-30/I, D..
ling S 1.1-14, ec. F-id. lokr Wlng
.i nih Aircra.
SI 11404. Dac, IRplomI of rgol
D .1 lk. 1ad.r A.d lad. blpoora.o
I. V I, TW-.7/U. TK-IIU, .1*Tool Mh-1510.
ovd. T- 100o/O.
SC 49204349 J71, D e. Tool $l.
OEg Ml4a Army AJinrcr SM A. S1 A
(SFIIW so 3. 1 C.M
T 5 5-1510-20-M0/1, Do. U.l.
11 55-1520-203-10/1, Do.. CH.37.
I1 55-1520-109-30/6. Ja, 01C-47.
TB 5S- 1S20- -309/6 ICon Cyl, J.
I 1-i SS- IIII I-20/. Dec.
TI 7r50M91.I. Dc. Al qFlad Wing
A 7AR OFr"RGER
F(REFLY S!! ...WE4RE
HERE, so PON,'r
S L1 O W D O W N )
MAN... 6S IT ..
ARK ...THEY'RE I IINKYOU
Ef NOT T0 RRST ANP MOST YOUO'THOOK
MUCH, BUT, IMPORTANT...OU IN EVERY JUICE-
ER... PON'T OYERLAD EATIN'GADGET IN
EM. THE AREA. LIKE THIS
SOFT DRINK COOLER./
GENERATOR LOAPS ARE BUT IF EVERYTHING
PARCELED OUT TO THE 15 HOOKED IN AT ONCE
IMPORTANT STUFF FIRST, AND USED ALL AT ONCE.
LKE COMMON. LIGHTING, POW!! YOU GOT AN OVER-
POWER TOOLS...ANP IF LOAD 'N'ZAP.
ANYTHING IS LEFTOVER... NOTHING!!. LIKE
y ou PLUG IN YOUR NO
EXTRAS. I ;u.
You GOTTA ALTERNATE
mEM,..IF YOU GOT MORE 'N'ONE.
RUN ONE, MAINTAIN THE
OTHER ...OR ELSE YOU'LL
6RINP THE UNIT INTO
YA SEE, A SUPPENHEAVY LOAD
15 LIKE RUNNING YR CAR ON THE
STARTER MOTOR.. NUMBAH 10 ,
AINT IT0..SO GET YOUR "REVS'
UR..THEN CLOSE YR BREAKERS,
AND SLOWLY APPLY THE JUICE.,
BEFORE I -.. WELL
CONTINUE -. OR 'TH'
ARE YOU A GIRLS NEVER
V-E-R-Y FUNN-EE! ONLY
QUALIFIED GENERATOR TYPES ARE
TO MAKE ALL ELECTRICAL TIE-tINS,
OR ELSE 50ME MIGHT BLOW THE
WHOLE EAL...POWER UNITANP
HEY, BRIGHT EYES..
THEY'RE A LEETLE
IF YOU WANT TO DISPLAY THIS CENTERPIECE ON YOUR BULLETIN BOARD, OPEN STAPLES, LIFT IT OUT AND PIN IT UP.
Your generator now is the heart,
That gives all your gear its first start-
Your common 'n' light,
All your tools for the fight-
So care for your rig, 'n' get smart. '
* 'r F
WITHOUT THESE PUBS Y'R
PEAP! YOU OPERATE ANP MAINTAIN
Y'R UNITS BY THE BOOK...ANP
AS FOR BOOKS, ENGINEER
SIGNAL ANP AIRCRAFT ARE 1
UNDER DIFFERENT NUMBERS,
LET.'S HAVE A LOOK-SEE
SIN YR FUEL TANK TO
CHECK FOR CLEAN FUEL
I AGHE LOOKIT THIS
i' '" STUFF.'
PIRTY FUEL BY THE WAY, WH KIAN'? LOW
COULP'A CAUSED THIS HOW'S THE LUBE LEVEL LUBE WLL BURN
BLACK-OUT... MAN, IN YOUR CRANKCASE, YA ENGINE
THAT STUFF FOULS MIGHTY IMPORTANT. EVERY TIME,
CARBURETORS, CLOGS SEIZE PISTONS,
LINES, YOU NAME IT. ALL THAT!
WOW! THIS IS ALMOST YEAH! LOOKIT NOT so! NEW
PRY!! YOU'RE GONNA FRY THIS NEW RIG! GENERATORS SHOULD
THIS ENGINE... IN THE FUTURE SHE'S EATING' HAVE LUBE CHECKED
FOLLOW YR 1. LIKA CHICK! OIL. MUST BE OFTEN DURING BREAK-
BE SURE TO READ THE FINE A LEMON. IN PERIOD... THEY
PRINT LIKE A CONTRACT. USE MORE OIL.
NOW, LET'S SEE BOY. LOOKIT THIS! EVEN A
SHOW 5HE 15 ASI BUG CAN PULL OUT THIS
SFAR AS GROUNDINGAK
CAUSE A FATAL
INTJRY, AND ALSO
RUIN YOUR RIG!.
HEY!! WHO WENT 'APEU WHY NOT! THEY ALSO CUT
WITH THEM SANP THEY PEAPEN OFF VENTILATION!
SAGS!! ON TH15 ONE. THE NOISE... IF YOU SAN BAG 'EMA
THIS RIG REALLY KEEP AIR FLOW IN1
ROARS. MINP OR SHE'LL
SSEIZE FOR SURE.
SURE, SANP BA65 PROTECT HEY BUG... HOLD IT
YOUR RIG. BUT YOU ALSO NEEP SHE'S LOW *
SKIPS, RAIN COVERS, ANI ON GAS. I'LL NEVER FILL
SHADE OR ELSE THE ELEMENTS FILL 'ER UP REL TANKS
WILL KILL YOUR GENERATOR AS NOW., WHEN TE ENIN
QUICK AS CHARLIE'S OR OT
WHY ISwrT THIS
...IF SHE'S Tor SITTING
LEVEL YOUR CRANKCASE CANT
6ET LUBI TO YOUR CRANK-
SHAT ANI THEN ZAP!!
NUMBAH 10 GENERATOR.
HEY BUG.. BECAUSE I REAP
HOW COME THE PUBS--PATM'S
YOU KNOW OR MANUFACTURER'S
ALL THIS PUBS IF THE
INFO GENERATOR ONLY HAS
PUBS. I ORPER 'EM
LIKE I PO A REPAIR
PART. THEN MY SUPPORT
SENDS THE REQUEST TO:
4500 GOODFELLOW BLVD.
ST. LOUlS, MISSOURI
BET HE NEVER
EVEN MENTIONS JC
ME A BIT OF
GO means gear oil. And it means trouble for your G742-series 2V-ton
truck's rear wheel bearings if it gets into the hub. Even worse, GO can mean.
disaster if it leaks onto your brake linings.
But there're 2 seals that block GO- if they're installed right, like so:
This 9/32-by-17/32-in hunk of cork is missing altogether in some trucks. It
has to be cut to fit from Cork, Sheet, FSN 5330-350-9099. Bevel one end a little
to fit where the inner end of the keyway slopes up.
You ever notice how a bum two-bit
part can put an expensive piece of
equipment out of business? Sure you
One of the most common examples
S of this problem can be found in the
radiator cap on a truck, tank, personnel
S carrier, self-propelled gun, fork lift-
you name it.
Sure, you eye the radiator coolant
level on your "before operation check."
You may even notice that the cap was
on tight which meant that the large
cap spring was in good shape.
But there's one more simple check
you want to make-one that's over-
S. looked all the time
Flick the valve with )our
Focus on the center fingers and if it does
of the cap ... not spring
the vacuum valve. back to
This valve is the flush
spring loaded and position, the
it should be .valve is shot
.A* seated (flush) if and you need
:. the spring is good. a ne radiator cap.
When your engine is running the vac- 'Course a broken valve may not sear
uum valve has to be closed so that your right to give you the seal you need dur-
coolant system can be pressurized. The ing operation--that's the rub.
only time the valve opens is when you When the valve is not seated the
water pump will push coolant right
out the overflow hose. And if you lose
.. enough coolant your engine will over-
Sheat maybe worse ... like a cracked
. :...? :... ; -..,
shut off the engine and the radiator
and atmospheric pressures equalize to
prevent the radiator from buckling.
You won't see a valve in the open posi-
tion unless it's shot.
BE SURE YOLU
. RUININI~ A
S FOR LACK OF
A TWO- BIT
RADIATOR CAP/ A
/ WEIGHT "CLASSIFICATIONS
(HM^) ~nu, .u1i0
.. WI ,
."; a f .L I -
u*, b.c. IS .. ... .b 1 oi -
(u2. wv., i ni]. i ""c .. i' j '--'"
... ...... .. .-
O. im k ,. Gd. 'IIo .... N iT O
you cross that next bridge. If you're needing the preferred weight classification
number for your vehicle, para IV-2, Appendix IV, pins it down tighter than
your parade field britches.
The 1-2-3 order of vehicle weight marking preference is:
I -- ROSS COUNTRY FI [
7 8 HI8
3 EMPTY l
So make sure the right weight classifications are on your vehicle.
RODS AND FRAMES YOU'LL N
Needin' rods and frames for winter -THE AMBULANCE71
doors and curtains on that M151A1l p i i CULRTAIN INCE
1 -ton truck? Maybe you missed seeing UCHANGE 4.
Ch I (Mar 65) to TM 9-2320-218-20P.te
You'll find rods and frames are part fsf
of the kit, door and side curtain, and g pref e
can be had separately also.
can be had separately also.
TACHOMETER-DWELL TEST SET
You may have a new model tachom-
eter-dwell test set, FSN 4910-788-8549, DO
which replaces the FSN 4910-395-1996 IT
test set in your No. 1 Supplemental THIS
Tool Kit and your No. 2 Common Tool J WAY
Kit. It's added to the No. 2 Common
by Change 1 (May 66) to SC 4910-95-
There's one important thing to keep
in mind. When you use that new test
set, don't connect the tachometer test
lead to the spark plug adapter the same
way that you did the old test set. If you
do, you'll burn out the set. 8"
You'll need the 8-in spark plug ADAPTER
adapter FSN 4910-356-7504, from
your adapter set FSN 4910-348-7600.
The tachometer test lead clamp on the
new test set snaps on to the adapter *
cable instead of to the brass screw on
the end of the adapter like the old set
NEW TIRE GAGE FSN
HOSE COME FSN DEPENDS
FSN 910-204-2547 AS ONE ON SIZE
Forget about those old tire gage and hose assemblies for 2V2 and 5-ton mili-
tary design wheels. The new combination is a self-contained, in-line gage and
air chuck with its own FSN 4910-204-2547. It fits any of these hoses FSN
4310-092-9264 (20 ft) ... 4310-092-9265 (30 ft) ... .4310-092-9266 (60 ft).
Each of these hoses is 4-in ID with a -18NPT male coupling and V2-2NF
Breaking the bead on a tire for a repair job can be quite a chore,
even with a pneumatic tire demounter ... seems like some of those
tires are welded to the wheel
So, we latched on to a 2-in piece of pipe, 30 inches long and welded
a broken pneumatic hammer flat drill to one end. Then we located a
broken I 1-in axle shaft about 36 inches long.
AXLE SHAFT FITS INSIDE PIPE
PIPE A DRILL
To use the bead breaker you just slip the axle in the pipe and im-
pact around the tire. On a 4-ton, 2 times around the tire will break
the bead, while it will take 3 to 5 trips around on a 2'-ton .
works like a charm.
CWO Randolph Phillips
Ft Bragg, N.C.
TAKE IT EASY
(Ed Note-Good going. Looks like a
real fine tool to have on hand when
others fail. Just be sure you use a foap
solution on the bead and move the
tool around the tire after each impact
so you don't do any damage.)
TB 3-600 (Aug 66) EIR and Maintenance Digest, has the warm scoop!
If the M13 or M13A1 gas-particulate filter-unit in your tank uses the M3
electric heater (FSN 4240-807-6856) made by Industrial Design Laboratories,
you'd best check the heater's controller assembly for loose electrical receptacles.
If the receptacles are floppy, the controller assembly has to be removed so
the receptacles can be soldered. Otherwise, the tank masks won't be ready to
provide warm air when it's real cold outside. Para 4g of the TB tells you what
to do. M3 heaters made by the Vapor Heater Corporation don't have this problem.
TO REMOVE CONTROLLER ASSEMBLY- AN EXPERT
DISCONNECT POES THE
3 PLUGS REMOVE 4 JOB.
THE AND LOCK
.^ ----.' R'<^S
Looks to m
until you can
hand, the -20
e like the LO and the -20 TM for the M60A I tank con-
)ther. The LO says to pump GAA into the support roller
feel the GAA at the seal behind the roller. On 'tuther
TM says to replace seals when grease is felt behind
SP4 E. E. H.
Dear Specialist E. E. H.,
Both. Once you understand how the grease seal works on the support
rollers of the M60, M60A1 and M48A2 tanks, you'll see there's no con-
flict between the LO and the -20 TM.
When you're lubing, the spring-loaded seal lets grease pass through
it when the pressure of the grease pushes down the spring. So, if you.
put your hand in the access slot behind the roller and feel the grease
coming through the seal you know that support roller has enough lube.
That's why the LO says, "lubricate until lubricant can be felt at seal
After a little of the excess grease gets thrown out during operation,
the grease pressure will no longer be greater than the spring pressure
so the spring will expand, keeping in the remaining grease.
In other words, the grease seal spring does the same job on the sup-
port rollers that the pressure relief fitting does on the road wheels. That
is why you don't have and don't need a pressure relief fitting on the
You'll find grease behind the seal during lubing and sometimes a
little bit in hot weather or during severe operation.
Other times, if you feel a lot of fresh grease behind a support roller
seal, it means that the seal is not holding and should be replaced-like
the -20 TM says. H /f- t
FREEHL GAA HERE/
The xenon searchlight on sour
N160 or M160A1 tank can'( shed
an\ light if ou break it. This can
happen real cas.% when e you're mom-
ing your rank through the loods.
To protect .our light from un
friendl. tree limbs, position it to
the rear of the tank. That na the
branches will hit the turret instead
of the light.
If the light is mounted for opera-
tion, putting the gun in travel lock
will give the best protection. If the
light is stowed, you can go through
the woods with the gun to the
See page 60 for more xenon
7w/3Jm13A/ 73A/ -i
How many feet in an each?
You supply types can quit worrying because from now on all orders for
Seal, rubber, special shaped section, FSN 5330-807-2874 should be in feet, in-
stead of per each.
This chart shows you in inches how much bulk seal you need for various
uses, where you can find it in TM 9-2300-224-20P/3 (Nov 64), and when there
is an exception to the rule.
To use it all you have to do is add up the total number of inches of the rubber
seal you need, change the figure to feet and order.... Sure beats counting beaches.
If you have an M48A2 tank, an M88 tank recovery vehicle, or any of the
other vehicles with a magneto booster coil, latch on to TB 9-2300-271-20
(May 65). It tells you how to build a simple tester to check out this coil. If
the coil, FSN 2920-565-0785, is OK, you don't need to replace it-which saves
M88 VTR REFUEL FACTS
YR FUEL TRAN5FERP
CONTROL ARE IN
To make the fuel transfer pump on
your M88 VTR work right you've got
to put the system selector control lever
in the REFUEL position. ... It figures.
But some drivers have been shoving
the lever into the AUXILIARY posi-
tion, which gives emergency power for
the boom and spade but not for refuel-
ing or defueling.
Even when you put the selector lever
in the REFUEL position you're still not
What happens, crewmen have been
leaving the hoses to the impact wrench
connected while they try to operate the
This does not work too good. Even
when you're not using the wrench,
enough oil keeps circulating through it
to lower the pressure so your fuel trans-
fer pump won't operate the way it
Simple cure, though:
Now all you have to do for maxi-
mum pumping power of 38 GPM is
slowly move your adjustable flow regu-
lator until the handle points straight
up. Remember, on this handle the lower
the number the greater the power, and
unless you have it at "0" you're not
getting its full power.
A PACKAGE FOR
MY COMMON GEAR
The width and depth hold the sets snug during transport. On the PRC-8, -1O's
you've got to be sure the depth is no more than 5%/-in, because there's an over-
hang on the taop of the set that's snag and wouldn't let the set rest on the base
of the rack.
Also, we've found that screws hold better than nails ... and the size of the
screws depends on the thickness of the wood used. A screw that anchors at
least an Inch Into the base wood works well.
S- I bolts are easy to come y, they coulc
We thought you and readers of PS might be able to use the basics on car-:
rying racks we've rigged for transporting (and storing, too, if space permits)
portable radio sets.
We've made three different sized racks to suit the AN/PRC-6, AN/PRC-8 thru
-10, and AN/PRC-25 radio sets.
The handiest arrangement we've found is a four-radio rack.
Naturally, the racks protect the sets while they're in transit to the shop, the
field, or wherever. They've prevented considerable damage... and are extra
valuable for rough terrain transport.
The easy-to-take part of the racks is that all you need are a few old ammo
boxes and a handful of screws. For added protection, a piece of steel packing
case strapping could be put around the outside of the rock. The strapping helps
keep the screws from backing out. STIE STRA
A block of wood 3-in by 6-in screwed or bolted onto two opposing sides
serves as a carrying handle. Of course, the bottom of the box is solid.
Since the size of the scrap lumber used might vary, here are the interior -
measurements needed for each compartment for the various radio sets:
AN/PRC-6 ANIPRC8,1 -10 AN/PRC-25 NA5L.
15-in long I 19-n long 11 inlong
4'/-in wide 3'-in wide 4/4-in wide -
3'/2-in deep. 5%-in. deep. 5-in deep.
Using /4-in ammo box wood, the PRC-8 outside measurements would be 16/4 by 20/-'in.
48 f 49
l e used to secure the handles.
SSG Raphael Hoff
Fort Benning, Georgia
A RT-524 receiver-transmitter getting a backblast from a 106-MM recoilless
rifle is about like you getting' kicked in the mouth by a mule. It shuts off talking
When you have a RT-524 cozied up with a recoilless rifle in, say,an M151A1C
-ton truck, your best bet's to put a blast protector over the RT's speaker.
A loudspeaker shutter (FSN 5965-191-6787) for the RT-524 will do the trick.
You'll find one listed in Fed Cat C5965-IL-A (Feb 67) on Page 36.
FOR ,'OUR RT- 524 15A CINCH.
JuST REMOVE THE SPE-AKER
GRILL SCREWS... PUT THE
SHUTTER OVER THE GRILL AND
REPLACE- THE SCREWS.
FSN 5965-191-6787 UNPROECTE
Of course, you have to remember to close the baffle before firing the rifle or
you'll blow out the speaker cone.
The protector is needed only with this rifle setup. The speaker's built-in pro-
tection will take care of it with other armament.
For hitchhiking a man couldn't want a better friend than a good, active
For fiddlin' with a TA-312/PT or TA-43 field telephone a man couldn't
have a worse enemy than said same thumb.
Some restless operators, thumbs goin' full blast, wear the rubber insulation
right off the lead-in wires to the handset. Ditto for the insulation at the housing
Lot's of maintenance shops have seen the results, cause that's where the
phones go after the damage.
Another past-time is peeling the insulation from the wires. Same result -
back to the shop. All because of some nervous thumbing.
Speaking of field phones (and switchboards) here's a little caution about
handles on generator hand cranks:
A good habit to get into is to fold the handle back in its slot as soon as you've
finished using it.
Stickin' out, the handle can snag on any of a thousand things and break off.
IN ONE ACT 4lAi-
DO THEY L I I-HAVE
..H HE E THE ENEMY,
OUR LOOSE GROUND
BATTERY IS STRAP BOLTS!
WE MUST DEAD
COM MUNICATE SIR1
THIS TO OUR BATTERY
Q AT A (ABLE
ONCE GOING TO
Trouble is, the bolts holding the battery ground straps to frames or engines
are out of sight most of the time and get overlooked. Dirt and rust get under,
lockwashers fail, and bolts come loose, a power surge hits the radio, and an-
other set's kaput.
Then when rough going comes along, loose connections feed on-and-off cur-
rent. A voltage surge hits a common power pack, and-whammy!
So squint at the ground end of all your ground straps. Unbolt 'em and clean
the surfaces to make metal-to-metal contact on the chassis-or engine. Check
lockwashers-be sure they're live. Then tighten back, and rivet-eye it every
Just to be sure nothing else flickers your common equipment's current supply
-here's what you want to do:
2. Make sure the carrier box and hold-down
hardware is deaned, painted, braced, and
1. Tapefrayed tight so the battery can't bounce-just
indulntinn snug, not so it'll crack the case.
YOU'RE GONNA 7'C-,,
USE US TO
SEE BYl.. .CHECK
Are slipping screws keeping things Replace the screws. Let 'em set for a
out of focus and you can't adjust the couple or 3 hours. Then, the screws
reticle pattern on your starlight scope won't stray and the knobs will stay.
Don't sweat it.
Remove the screws from the focusing...
elevation adjustment and azimuth ad-
Dab the threads with locking torque
sealing compound (FSN 8030-081- 'HIT .THREADS
2329, listed on Page 68 in DoD cata- WIH SEALING
log C8000-IL-A, dated Jan 66) or any COMPOUND
other MIL-S-22473B sealing compound. TO END
There's a list on Page 179 of the GSA SW
catalog (Oct 66). I
STARLIGHT... STAR BRIGHT
You been wantin' a little power source for your individual weap-
ons night vision sight (Starlight Scope)? Well, beam in on this. FSN
6135-926-0827 will get you a BA-1100 battery. It's in Ch 3 (May
66) of SB 11-30.
.y4 "'.. .:....".. ': !1
NOTICE: Keeping property j Requesting supplies f DIG THOSE...
UGHTER book records ... and equipment. 1, NEW
PAPERWRKMIN Making up equipment records and reports...
LOADS A COMIN I
TOE's AND MTOEs
Also, in an emergency your outfit can use the fastest means available to get
an OK from DA for additional equipment. Then it has 60 days to send in the
MTOE which includes the equipment requested on an emergency basis.
The big thing with the MTOE is that it's "fathered" in the field by the TOE
user concerned. So, like never before the field has a big hand in setting up its
Modification of a TOE-who is responsible for the MTOE, when and how
it's made up-is covered in Section V, AR 310-31 (Apr 66), Organization and
Equipment Authorization Tables.
The new TOE format is streamlined,
easier to use and provides loads of
handy info on equipment identification
The MTOE simply trims or fattens
the basic TOE's allowances to fit the
needs of a specific unit or units.
When a TOE is modified the MTOE
sports the UIC (unit identification code)
of the unit concerned. That's how you'll
quickly spot a published MTOE which
modifies your basic TOE. The MTOE
OK'd for your outfit, of course, will not
affect other units operating under the
same basic TOE.
If DA policy makes changes which
apply to all units operating under a
basic TOE, the TOE will be revised by
a numbered change, not by MTOE.
And, when DA initiates changes
which apply across the board for vari-
ous types of TOE's, the changes will be
published as consolidated TOE changes.
And, as in the past, the consolidated
TOE changes will be numbered in the
On your property book page the TOE
allowance goes in the "total allowance"
block and the MTOE allowance goes
in the "current operating allowance"
If your outfit doesn't already have a
TOE sporting the new format, it will
soon--so keep an eye out for it. You
can spot a new one easy enough since
they all have a capital G after the TOE
number. And, also at the bottom of the
cover page you'll find a paragraph that
"This table is published for the pri-
mary purpose of converting the super-
seded TOE to the new format prescribed
by the New Army Authorization Docu-
ments System". (NAADS).
SECTION 1 AND
SECTION r REMAIN PRETTY
MUCH THE SAME. BUT, IN SECTION
r (THE EQUIPMENT SECTION) YOL
FIND REAL UP-DATED INFO.
202 1 PER POmERNAN.
219 1 PLR 51 ACVY NECH, SR TRACK VEH HECH
RCVY IECH, TRACK VFH HECH, TRACK VEH
238 1 PIR TP-INSTL RPXN. SWITCHBOARD,
CO'ITOL SET ANIGRA-39.
245 1 PER UNIT AUTH RADIO MECH.
502 1 PER TEST SET ELFCIRON TUBE TV-71U.
504 TuO E MOUNTED IN ARIOREO RECONNAISSAI
THE 600-SERIES TYPE STUFF
And, speaking of the remarks col-
umn, here's something to watch for
when you're checking your equipment
against TOE allowances.
An asterisk in front of The remarks column
an item's description tells continues to use 3-digit
you the item is mission codes to explain things
essential and reportable like who in a section gets
under AR 220-1 (for ac- a specific item, under
tive units) and AR 135-8 what conditions you get
(for Reserve outfits). o certain item, and what
components come with an
Although the 600-series coded items
-those things you get "When Author-
ized By" the major commander con-
cerned (WAB TOC, WAB USACON-
ARC, WAB ARADCOM)-are listed
in Section III of the new TOE's, they're
not included in the TOE's equipment
recap info. In other words, when these
items are needed they'll be authorized
The handiest deal in the new TOE
format is the addition of a new section
-Section IV, which is loaded with
equipment identification info, and other
handy info for supply and maintenance
and unit readiness reports and records.
It gives things like:
1. The old LIN's crossed to the new
2. FSN's for all items listed in the
3. Commodity command codes. The
codes are explained in para 4b, SB
4. Multiple line items showing FSN's
for the authorized makes and models.
5. Equipmenttypeclassification. The
standard A, B, C, LP, N, etc., classifica-
tion codes listed in para 4e, SB 700-20.
6. ICP codes (inventory control
points). The supply agencies respon-
sible for the item. And, para 4c, SB
700-20 covers these codes.
7. An asterisk in a column headed
"AR 711-140" tells you an item is re-
portable under AR 711-5.
8. And, an asterisk in a column
headed "ESC" tells you the item takes
TAERS (TM 38-750) records.
LOOKS GOOD... NO?
Yep. Your unit's equipment request-
ing, accounting and reporting opera-
tions should get easier under NAADS.
Can't you just see your paper shuffling
sweat easing up already?
EZEKIAL K. SMITH,
> 1867 AS PER TA
Dear HafH-Mast, W .
How do you account for major items listed under "troop installed" heading
in TM's 811L?
Do they get a separate property book page? Or, are they listed as com-
ponents on the back of the page for the major item they're used with?
SFC J. A.
Dear Sergeant E. J. A.,
Reportable "troop installed" items
which come from your TOE or TA are
accounted for on the property book
page covering your TOE or TA allow-
ance for the item.
A "location" note or the handreceipt
info on the back of the page pegs an
item to the major end item it's used on.
I ca. RcdTT. M/J (IlA
nlPm *'n** 0101 I
r atia tTin w*/agdela? (la
On the other hand, BIIL items which
are issued with a major end item are
considered part of the equipment they
come with and are included in the
equipment's basic FSN; therefore,
they're accounted for on the page cov-
ering the major end item itself.
The page simply takes the note
"w/equipment" in the nomenclature
block. Serial numbers of any weapons
that may be issued with the major end
ncm are lis(cd on the back of the page.
WHOlE TO GET...
Dear Specialist R. B. D.,
A lot of supply-types make their own file boxes out of wood, pasteboard, or
whatever other suitable material they can scrounge up.
But there's a 2-drawer (side by side) file cabinet in the supply system that's
designed especially for these 7Vs-by-34 -in cards. Listed under FSN 7110-990-
8883 in Fed Cat C 7100-IL-A (Mar 66), it costs about $7 and it's a DGSC con-
You can file several thousand cards in this cabinet. And it's got stacking slots
and interlocking lugs for building a bigger file.
You noted a drink oftener in hot.
muggs going, and dusr) country% lju[
makes it worse.
The same's true for )our equipment.
onl\ it drinks lube sreada ahat iou
like. If 'ou'ce a 60-ion Harnischfegcr
1125G cra'ul-r crane, %ou ha'c to
jatch ir speciall) close ..'cause char
main propelling gear chokes do" n
i.a .i I
Hey! \\ while ou'rc killing in figures
for \our M60 rank or M'28 CE\. add
some for operation' ime of )our xenon
You need to let bour Nupport know
w hen -400 hours hase rolled around for
rplacin' the brushes in that big candle's
blower motor, ike it sass in TM 5-
A' n. ni. 1; i kf 6 ti
WHEN ',OU PUT POWN SEARCMLIGHT
OPERATING TIME ON A SEPARATE DA
FORM 2408-1 FOR THE LISHT, ADD 5
,tMINUTES TO GLOW ON. IF \OLA NEED
IT PARA I-'C AND 4-26a IN T-M 58-750
&GV'E5 OU THE AUTHORITY FOR A
S ADDING A FORM,'
HOM IS THAT
Like I instance, a SU-minute
STANDBY and ON time for the
searchlight should be jotted
down a, 3- minutes. That's
something extra for the blower
motor, which keeps going until
the lamp [emp's lowered
Sure. TM .3810-25L12 Il Ma o06
sa!s put chain-wire lubricant ICW1) on
rhat gear e\ern 10 hours-hut best be
sure to0 gi'c it drink eeer -4 hours in
hot country) or rough going. That gear's
on the deck, lcfr of ? our seat. and there's
no coicr to protect it Unless you'ree
quick on the stick v ih fresh lube. \ou
could be stuck in the boondocks nv ch
23511.000 pounds of no-go iron.
j? ---^-~ -C
TO SAVE THAT
To keep that rope starter pulley on your 10-HP and 20-HP Military Standard
Engine from coming loose and halting your alternator, here's an answer:
Torque the nut, FSN 5310-582-8783, in front of the pulley down to 950 or
1000 inch pounds (if your wrench reads in foot pounds, that's 80 lb-ft).
That torque suits both sets of Continental Mil Std Engine Models 2A042-II
and 4A084-II as well as both Hupp-Hercules Mil Std Engine Models 2A042-III
'f -.c ." ,
If you've got a Huber-Warco Grader Model 4D with a General Motors
4-71 engine you may have noticed oil blowing or dripping out of the bleeder
pipe from the air box.
There's a reason for that drip. The engine piston sleeves are now made of
different material so it takes longer for the piston rings to set to the sleeve walls.
After you've run your rig from 300 to 500 hours the oil drip should stop.
Do you wear glasses? Well, remember you need a special set of optical inserts
for when you wear the M17 field protective mask. See para 13, TM 3-4240-202-
15 (Nov 62). And, if you're planning to take off for some place where the mask
is always part of the uniform for the day, be sure you've got the optical inserts
before you go. They might not be so easy to come by just any old place.
BEND THE LEAVES
Dear Sergeant R. W.,
Make a 3-leaf lock plate out of
18-gage sheet metal and put it be-
hind the bolt head. Bend 2 leaves
over the bearing cap and 1 over
the bolt head. t-
You air types in Charlie country had
better eagle-eye your APH-5 and APH-
5A flying helmet. If it has the visor, FSN
8415-933-9281 or FSN 8415-933-9282,
authorized by MWO 10-8415-202-30/3
(Aug 66), then you should round the
lower edge of the visor. You can do
this by honing or filing. You always file
toward the edge of the visor.
Mea#d 7e~a& ;eo
To make music with your rough ter-
rain fork lift, either the 6,000-lb or the
10,000-lb style, better include lubing
the side-shift rollers and sprockets every
4 to 5 hours. Otherwise they'll freeze
up. Naturally, you have to have fittings
on all lube points, so make sure they're
You not only can save your outfit
$$$$$, but you can get your QL9M1
Thermo King Refrigeration Unit (FSN
4110-967-9762) back into operation
faster if you'll order the parts to the
panel control assembly instead of the
whole assembly. You'll find those parts
listed in TM 5-4110-205-25P on page 7,
under functional control group 0607.
There's been another Urgent MWO
you can add to the list in PS 171 -MWO
5-5130-224-50/1 (3 Aug 66), for Ham-
mer, Electric, L and M Mfg Co., Strunk
Model GH2, FSN 5130-542-4545 (Serial
number range 000001 through 000700).
If you have one of these, better turn it
in to your support pronto so it can be
shipped to depot.
7Uden1 t 7. 1t.c
That MWO on the Harnischfeger
Model WNG 300B arc-welding machine
has been changed from URGENT to
NORMAL and from 5-3431-216-50/1 to
5-3431-216-40/1 by Change 1 (21 Nov
66) to the basic MWO.
?&4"tc 5' --
1tca ?c1 s 'S?
When you need a part for your gen-
erator, don't grab just any old generator
parts manual to do your ordering. Make
sure you've got the pub that belongs to
your equipment. Check the latest DA
Pam 310-4 and changes for the TM num-
ber. Most parts are not interchangeable
between different generators so no use
to try 'em.
Taking your whip antenna sections
apart once a day to clean 'em is the
best way going to prevent rust and cor-
rosion. Wipe male and female threads
dry, and get the dirt out.
Tight connections on your MT-1029
and MT-1898 mounts of your FM radios
can head off serious moisture build-up
in the junction boxes with obvious
benefits. So-o-o-o, push RT's and re-
ceivers firmly into mount receptacles,
snug cables all the way up, and use re-
ceptacle covers when components or
cables are removed.
Here's another one of those jot-'em-
down items. The 21/2-lb capacity hand
type dry chemical fire extinguisher (FSN
4210-889-2221), and the dry chemical
charge to go in it, (FSN 4210-889-2222),
have been transferred to the Defense
Construction Supply Center, Columbus,
Ohio 43215. Your requisitions for these
items should show Routing Identifier
Property-book types, hold one:
The info in para 3-8b, AR 735-35
(Oct 65), and in para 12, Change 5
(Mar 66), AR 735-11 does not apply to
expendable supplies. The instructions
on quarterly droppage apply only to
minor non-expendable items, like it's
spelled out in AR 735-11. To drop ex-
pendable stuff that's FWT, check your
local SOP and para 4-6a(1), AR 735-35.
O"e W Gt et 1/o 10
One look at para 5-336(2)d, TM
55-1510-201-20 (Apr 66) tells you how
to remove the fuel injector oil screen on
0-480-3 engines in your Foxtrot model
Seminoles (U-8F). What it doesn't tell
you is how much torque to use. Would
you believe 10 ft-lbs? You should, 'cause
that's the correct amount of oomph to
use. You'll find it spelled out in Ch 1 to
TB 750-931-1 (24 Jan 67).
Keep '5 Em N"<
Make sure those siings and collapsible
500-gal fuel contains rs containers of
every description get back into the
supply system in good shape after
they've been airdropped to you. The
next load they carry may be for you!
the Condition of Your Equipment ?
Would You Stake Your Life ron
NEVER OPEN REPAIR
S 15IS READY
j TO USE
12 THEM .
BECAUSE, ONCE OUT OF ITS PROTECTIVE SHIPPING CARTON,
A PART CAN BE CLOBBEREP BY PIRT AND MOISTURE.