PS

D

0

f reduces vital current to power his outfit's common, refrigeration,
lighting and shop equipment needed to maintain unit readiness.

TIi PREVENTIVE MAINTENANCE MONI L
ii sue No 194 2969 Series
IN THIS ISSUE

COMMUNICATIONS 2.11
AN vi" 12 27 AdlipLcrF. 9
Ai19ld Anitena 8 T '71 T ,1,,,Ittr 9
AN'.PFO,14 10 II

AIR MOBILITY
un 1219

FIREPOWER 20 27
M(GMi Lut, 2024 3 .i0.,btljurtr 26
M144.1 lll. 25 Mi.') H:....i; r 27
Mlu. ?l-ll'i 26 MI i,?),AI ,ji. 27

GROUND MOBILITY 37.45 -.
L T,1 Iruk 31.40 fon I~r cr 43
4 T,.I r,,,[ 37.38 41 UiY6 44
'I5 % n Iru l.s 39 40 41 IJ~6 M0) 44
lr.0crl, ohuihloi 40 IrCch, V iricI S
Dr.vr ipIlEr 41 j::li 45B
BernlCare 42 MI13A1 45 '

GENERAL AND SUPPLY
MICLW lde. 4554 D[ ln,,:.. O ulti. 57
N.u Re..ltrr[ 55 A .',110 58
HAilr .:inMlir 55 rIcrirEt O Ip.Tinf 58
M ,ril l..1ini M]cr.rMe 55 .W .C-r. ;.Ilor 59
ballaltEr, Ch r 56 Imr!,,run HF.e Er 6041
Pub N,. 56 IM 38l?0 Cn I 6B24
45 C. Wjlo 51 N. PutlllCin 2B
Supply 9. 15.18 20 26 27.30 40.41
42.45 46.50.52 5 55 and59

UJs ol lunds lor printing of this Puilicl
lion has been approved by Hedquarters,
Deparimenl ofr n. Armn 26 February 1966
DISTRIBUIION In acordance with re
quirements submitted on DA Form 12.4.

40/ | ..1

L.o/

toNuf1CAPON6

BE YOUR OWN INSPECTOR...
How sweet it is!
That's the AN/VRC-12 series radio
set... when you take care of it.
Whether it's in a wheeled vehicle or(
part of a package in a track, a good
operator-type will keep things moving
his way by watching for clues that tell
him preventive maintenance is needed.
0' course, a real boost to a piece of
radio gear is to turn it off when it's not
in use, especially before starting the en-
gine in a vehicle it's a partner with.
This'll guard against sudden power
surges that can send a radio set into
old age or the junk heap real fast.

iYoUR RIP RARIN'

/VRC -12 SERIES

To give a hand in helping that radio
set do its best for you, here are a couple
or three pointers that'll tip you off to the
need of better maintenance.
The bold type items are real serious
and should be taken care of pronto.

THE RT-246 RECEIVER-TRANSMITTER

| J

GASKETS Hard, cracked, chipped.

KNOBS Loose, bind, missing.

COVERS-Screws missing, dirty,
scratched, need paint.

CONTROLS Loose, bent, broken,
missing; screws loose, missing.

SPEAKER-Dirty, clog-
ged, dented; screws
loose, missing.

GUIARDS- BenI,
broken, missing.

PLUG Dirtv, pins
bent, broken.

BLOWER MOTOR Noisy, binds, won't
run; squirrel cage dirty, fins bent,
wobbly, broken.

CONNECTORS-Dirty, pins worn,
broken; insulator cracked, broken.

~3Q7

/2

THE R-442 RECEIVER

4'le Got
MLE.0 GdLLM0"

IFI
J --~-

MT-1029, MT-1898 MOUNTINGS

GROUND STRAPS-
Loose, missing, cor-
roded.

CONNECTORS Bent,
binding, dirty, fail to
make contact; screws
loose, missing.

A

AB-15/GR MAST BASE

IroKen; fittings paint- /HERE ARE
ed, corroded. THE PUBLICATIONS
THATLL GIVE YOU
BOWL-Cracked, A B1G HANP N
loose, broken. CARING FOR
YOUR VICTORY-12
* \ RAPIO SETS!
GASKETS-Hard,
dirty, split, missing.

GROUND STRAP-
Loose, missing, cor-
roded.

ADAPTER -
Loose,
missing.

CABLES

CABLES- Dirty, hard, insulation cracked,
pulled loose from connectors, connectors
bent, pins broken. CHANGE 2

AS-1998 ANTENNA--
A loose, limp antenna can get lost and
put a crimp in your line of communica-
tions.
That's right especially, when it
comes to that AS-1998 on the AN/
PRR-9 radio receiver set.
Putting the set of blades on the an-
tenna base into the housing backwards
can keep the retaining screw
from locking the antenna in
position.
Or, in the case of the
earlier AS-1998, that second
set of blades causes the same
problem.

( NO SWEAT
WHEN THERE ARE
TWO SETS OF BLADES
...JUST FILE OFF
ONE SET OF BLADES
FLAT WITH THE
ANTENNA BASE.

Make sure the filings are whisked off
before inserting the AS-1998 into the
housing, 'cause they could short out
your receiver set.
0' course, you have to marry up the
single blades with the grooves in the
housing's brass insert to get good con-
tact and lock the antenna in position.

IN
RIGHT
I I

... up
TIGHT

BENT PINS HURT "/) _j' _
Back off with the dikes for that AC input cable's power plug pins on the PP-
2685/GRC-109 power supply.
Before you wind up cutting one side of each pin, make sure you have a con-
nector adapter (FSN 5935-199-1787) on hand. It's listed on Page 136 in Fed Cat
C5935-IL-A, (Mar 68)

CONNECTOR LAMPHOLDER TO THESE1
ADAPTER ADAPTER

jT

While you're at it, latch onto the lampholder adapter (FSN 6250-864-3330).
The one on Page 115 of Ch 4 to TM 11-5820-474-14 (May 62) should read
"6250".
Then, when you have to change from the continental-type connectors to the
American-type, you'll have the adapters to do it.

KEYER KEEPS KEYING

You say your T-784 transmitter on HECK KEYER
that AN/GRC-109 radio set keeps ke. CHAIN INSULATION
ing when you key 'er on a keyer hook-
up?
Your best bet's to eyeball that keyer
cap and chain. 'Cause it could be rhe
insulator on the chain is cracked or
mission If the flexible metal chain's insulation
This'll let the chain touch the EXT sleeve is damaged or missing, get 'er re-
KEY and short out the transmitter, placed-or tape it up tight to keep the
keeping that keyer keying constantly. T-784 from keying all by its lonesome.
9

'. ... : .:.; ,.. .
A couple of cable assemblies in your AN/MPQ-4A radar set can whomp up a
heap o' grief for you especially when they get tangled up with interlock
switches and generally goof up the detail.
They're part of the C-2014/MPQ-4A power control power supply and the
CP-319/MPQ-4A radar data computer.
The power supply cable can get involved with the S-1001 male-female inter-
lock switch, and the data computer cable gets cozy with the S-1005 switch, in
both cases as the drawer doors are shut..

Naturally, this combination doesn't
pan out.
The unscheduled togetherness can
cause the cables to spread, become bare,
and show up with mashed and other-
wise damaged wires.
The male portions of the 2 switches
can break off, or bend, and not work.
But there's a field-fix that'll keep you
in operation:

Wrap double or triple thicknesses of Now, this
plastic electrical tape around the cable but you'll st;
for about a 5-in stretch of the cable's your MPQ-4
mid-center. permanent fi
This'll strengthen the center area of Incidental
your cable and help hold down wire and friction tape.
switch damage. pull on the s

TRAVEL MUD-GUARD

Another thing: If )ou let your radar
set's travel mud-guard (fender) bang
against the elevation depression meter
during the s% ing of the radar base .
well, that can be trouble, too.
Make sure the guard is positioned all
the a ay down for the base travel. Other- D
% ise, there can be breakage of the mud- BAI
guard at the weld points.

fix'll keep you in action-
ill need to get support on
A as soon as you can, for a
x.
ly, better not try regular
. It can catch and fray and
witch bracket.

CAREFUL

IONT LI FEDERl
NG AGAINST METER -

^_ HUEY (UH-1) CREWCHIEFS, MECHANICS...
.0 WHEN YOU PULL THE BLACK BOXES ..

Gather 'round lads, for an in-country skull session the kind that'll keep '
you "in the know." So, never use dikes on wire bundles.
For example, do you know that cutting avionics wire bundles when recov- You won't lose any time by disconnect-
ering black boxes from a downed bird can make the whole airframe economi- ing the cannon plugs before you yank
cally un-repairable? Those wiring harnesses don't come cheap! the sets.
TH...DIS(ONNE(T TE PLUGS
NEVER (UT THE WIRES

The gyro instruments in your bird

S" deserve tender lovin care. NO
Yanking out on the caging knob will YANKING ENT

"A-E 13- N
-Ya- .. S G o wi

--' o SAVE THE INSTRUMENTS

that leads to? Early failure, man!
Cage and un-cage those gyros gently,
1z using constant pressure. '1

PROTECT THE RADIOS
When it comes right down to it a lot of TLC is needed RADIOS
by crewmen to keep radios in numbah-one shape. OFF
Keep the sets turned off before you crank up the bird. BEFORE
Here's why. Right after engine start the generator kicks CRANKING
in to supply operating voltage.
The excess \oltage, cho momentarily, feeds thru the electrical sssrem to
the radios. If the radios are turned on this "spike" will knock the delicate tran-
sistors for a loop.
To keep your radios out of the repair san follow these simple steps.

1. Crank up Ihe bird. 2. Eye the voltmeter. When you get 3 Turn on your radios
28 volts you're operating at the I -.... q
maximum which means that the
feedback voltage has been picked ~--
up.

4. Let the radio transmitters
warm up for at least two
minutes to reduce undue
stress on components

MAKE SAMPLING TOOL

Taking the 25-hour oil samples from the 42-degree and 90-degree gear
boxes can be a bit of a problem. Once the chip detector is out, mechanics use
scribes, phillips screwdrivers, nails-you name it-to push in on the check
valve and draw the sample.
The result is sometimes a broken valve what a revoltin' development!!
14

To save bird parts, latch onto a salvaged
1/4-in diameter piece of aluminum tubing,
FSN 1560-923-4068, and cut off a piece 41
incheslong.
File down a slot on the OD for packing
ring, FSN 5330-542-1420. The packing wil 'A
keep oil from dripping down the outside a I
the tube when you take the sample.

But enough of that cockamamie sampling tool. Step closer and let's consider
that old bugaboo, foreign object damage, in a new light.

CHECK FOR CAUSES OF FOD
The increased output of the new T53-L13 engine in the HueyCobra and "H"
Model means an increased velocity air flow-thru the same diameter air inlet
as on earlier engines.
So, you can see that FOD is even more critical on this baby. No matter what
Huey you crew, tho, one of your most important maintenance checks is to eye the
engine inlet area before and after every mission.
15

To use this little gem insert it into
the chip detector opening. Push in on
the tool-which will open the valve
evenly-and release oil into the tube
thru the 4 slots in the tool.

f' \\\

Y," (4 SLOTS)
1- _

%" (FILE DOWN
FOR PACKING)

Slip the "padding ring
and a salvaged (hip
detector plug over the
tube and your tool is
complete.

Before you mount your charge, eye
the soles of your jungle boots. Stones
get wedged between the cleats and can
fall into the engine inlet area.
Sure, the sand and dust separator
reduces erosion of the compressor
blades and housing. It won't keep
solid objects from entering the engine,
tho.
A stone sucked into a churning
compressor can make mince meat of
the engine for real!! Keep those bro-
gans clean.

Look over all areas, especially forward and above the engine inlet for material
that can ruin the engine.

SCRE CS SEPARATOR
?TIGHT?

DZUSS

See that all nuts, bolts, screws, washers, dzus fasteners and latches on the sand
and dust separator are tight.
After you pull maintenance remember that good housekeeping helps prevent
FOD.
To stop safety wire, cotter pins and other hardware from going into the sepa-
rator during rotor head and engine inlet maintenance, cover the separator. Can-
vas or even a large towel will do the trick.
Before you remove the covering, police-up the area. Remember that rags
and tools left behind will also KO an engine.
16

-'-jNj USE RIGHT TOOLS N ( j)o
There're times when you 35K-types
pull the sets for bench checks. If you're o
called upon to do some actual bench

tools.
work, tho, be sure you use the proper 1 |I r

For one, never use a screwdriver
where you're supposed to make with a
tuning tool. Too much pressure applied
by a screwdriver will strip out the recess
in the tuning slug of the RF and IF cans *
-give you radio failure. US IH TUNRG 0

STAY WITH SET

WHEN TOTING YOUR
SETS TO-AND- FROM
SUPPORT... TREAT
'EM GENTLY! )-' &

Never let anyone who doesn't know the difference between a radio set and a
tool box handle your avionics gear. He's liable to toss your radio in the back of
his deuce-ana-half. After a bumpy ride to support the set will need more than
just a bench check! !
KEEP SETS CLEAN
With the cargo doors off the Huey, dust gets whipped right inside the bird. The
console really takes it on the chin with gummed-up gear trains and shorted-out
components.
17

Signal distribution panel, C-1611A/ |. T .i.
AIC, really catches dirt. Keep the panel *. / .':. :
clean by using a soft-bristle brush or: I.. A:
compressed air (25-28-PSI maximum). '
Otherwise,you'll be replacing umpteen a -
switches. / "
Keep all your avionics gear clean by ~.
using a vacuum cleaner, air hose or a
brush.
NO SQUAWKS, PLEASE!
You been getting any gripes about garbled transmission or reception lately?
If you can't pin down the problem to an individual set, have a look-see at the
A-16 impedance matching network in the communication junction box.
All the avionics gear and intercom signals funnel thru these pads on the con-
sole. Dirt can really get booted in there. Add the corrosion that's always
showing up and you've got short circuits-intermittent operation ... complete
failure.
TM 11-1520-210-20 (12 Jul 66) doesn't call for a pullout time for these ba-
bies. Depending on the conditions where you are, better take the pads out and give
'em a cleaning. Some outfits do it on a 100-hour Periodic.
Clean the contacts with a suitable cleaning solvent like Inhibisol. Page 4.65
of Fed Cat C6800-IL (1 Jul 67) lists the solvent. FSN 6850-582-1647 will
get you a gallon can at two bucks a throw. Apply it with a lintless cloth.

IF CORROSION REMAINS ON THE PAP CONTACT
PINS... TAKE IT OFF BY USING NO. OOOG SANDPAPER.
FINISH IT OFF BY USING CROCUS CLOTH.

C_

Be sure not to overlook the receptacle in the junction box. A burnishing tool,
such as CT-265, will get rid of the corrosion. Compressed air (10 psi or less)
and a soft-bristle brush will take care of dust and dirt in resistor and capacitor
assemblies.

PUT 'EM BACK GENTLY
Putting radio sets back in the mounts correctly is mighty important. You'll
damage the RT-348/ARC-54 if you ram it home in the mount when all the mating
connections are not lined up. ---
a ini / -, Z >'ALA E. '

The metal guide pins are soft metal and bend rather easily. A bent pin means
you'll probably push out one of the 3 co-ax antenna connectors in the mounting
and put your set on the blink.

',," /7 7 When you feel the con-
Sin T sections engaging, use
To get good mating connections run your Next, insert the RT-38 some pressure to corn-
fingers over the mount to determine that no ARC-54 slowly. plete the seating .
foreign material is blocking the hookup. that's the ticket.

Fact is, proper mating of all your
avionics connections is mighty impor-
tant.
To prevent damage to cannon plug
contact pins be sure to mate up the gu ide
pin with the slot in the receptacle. No
off-centers, please!
Yessir-e-e-e, remember that TLC.
lads. It goes hand and glove with pre-
ventive maintenance.

SWHY YOU ASK IS LUBING -
50 IMPORTANT?... BECAUSE
IT CUTS FRICTION AND WEAR
ON MO NG- PARTS... A-NC FIGHTS
RUST'N CORROSION ON PARTS
T THAT DON'T .'%0LE!. -

FOR __ "
ABOVE- '
ZERO -,f aa --.
AREAS C -

PL Special (Lube Oil, General Purpose)
FSN 9150-273-2389... 4-oz can;
FSN 9150-231-6689 1-qt can.
LSA (Lube Oil, Weapons Oil Medium,
MIL-L-46000A)
FSN 9150-935-6597 ... 2-oz plastic
bottle;
FSN 9150-889-3522 ... 4-oz. plastic
bottle;
FSN 9150-687-4241 ... 1-qt. can;
FSN 9150-753-4686 ... 1-gal can.
FOR
BELOW-
ZERO .
AREAS y '
LAW (Lube Oil, Weapons)
FSN 9150-292-9689 ... 1-at. can.

HOW TO DO THE JOB
By the book, that's how-if you possibly can. In combat, natch, you do it
when and how you can. Period. I .-

S Work on a clean area. Your pon-
cho or jacket or a tarp will do in
the field
i -,.,.,, ,.-. ... i. ;,l, ',, -
^ ,-^---^^

PL Special and LAW Pour some
on a clean swab, wring the swab out till
it's just moist, then wipe all parts and
surfaces with it, using your cleaning
rod for inside areas.
LSA Squeeze a couple drops from
the bottle on the parts that require it.
Let the oil run over these parts.

Tip: In areas where you use LSA it's smart
to put the LSA on the parts that need it
before you put PL Special on the other parts.
This way the LSA's bound to be closest to the
metal it's aiming to protect.

SPut your weapon and mount back
together and function-check 'em
to make sure everything works
OK.

~IE

the cylinder topside
when cleaning

LSA ONLY ON BOLT
LOCKING LLIGS,
ACTUATOR ROLLER,
CAMMING RECE55 FOR
OPERATING ROD.

M122 Tripod Mount
PL Special: on all parts and
surfaces.

FIRE AWAY WITH LSA
Y'know that note at the top of page 20 in your M60's -10 TM ... the one that
says to put a light film of MIL-L-46000A lube-LSA-inside the gas cylinder
and piston of your weapon after cleaning or inspection only if your gun's sel-
dom used or is stored in the arms room?
Well, forget it.
From now on put that light film of LSA inside the gas cylinder and gas piston
of all M60's in hot, humid areas-whether you're fighting with it every day or
resting it in the arms room.
And don't worry about firing off with the LSA in there. The first round or
two you fire will burn it away ... safely.
The big thing is to get a light film of LSA on these parts.
When you've got the gas system apart and cleaned and inspected according to
the good book, do this:

A OUGHT FILM OF LSA ON...

This'll help fight the corrosion that's bugging M60 gas systems in 'Nam.
One thing you never want to forget, though: Using LSA like this won't ever
excuse you from cleaning and inspecting the piston and cylinder to keep corrosion
from taking a hold.

Maybe a few words on the "why" for where and how you should position the
handgrip assembly on your M14Al rifle will help prevent some of the busted
stocks and hinges that've been haunting some outfits ...
F'rinstance, when you do it the right way-with the second hook on the
sling through the rung on the bottom of the handgrip and the handgrip
slightly forward in the unlocked position... and the sling dead tight from the
front (bipod) swivel end to hold the handgrip this way-you've got it made.

WRONG RIGHT

This way any blow at the handgrip will be deflected by the sling or the sling
will absorb the shock through its webbing. Also this set-up will keep you from
yanking back too hard and busting the hinge when firing. Besides, it'll give you
better muzzle control during automatic firing.
On t'other hand, if you have the handgrip straight down and locked and leave
the sling loose or allow metal-to-metal contact between the handgrip and the
base, any blow to the handgrip will likely bust the stock above the handgrip.
So-oo-o!

TELESCOPE COVER READY
AH
S" .Y'CAN HAVE
YOUR DRAWER!
BACK NOW.

GOOD NEWS FOR
YOU M102, 105MM
HOWITZER CREWMEN!

a canvas proiec-
tive cover is author-
ized as a BIIL item
Sfor the M 14 elbow
s telescope. Its stock .
number is FSN 1240-
084-0280, and you
S' can request it now.

SFSN 1240-084-0280

KEEP 'EM PAINTED
The question keeps popping up-and the answer's always the same.
Yes. keep paint on the muzzle blas[ deflector and breech guard
of sour M20-series 3.5-in rocket launcher. Bare. shins metal
i, a worse gineaway than a bald head in combat. And
if it doesn't get .ou zapped, it might get iou
gigged. So. if the paint wears off.
put some more back on. Clean '..
ihe surface hrst ah .i.
drncleaning solsenr, ..
dr it good
and

then apply an even coat of OD (Enamel, semigloss FSN 8010-297-
2105-1 gal can). Let the paint dry over night, if you can.
26

WHAT YOU DON'T KNOW
CAN HURT YOU!

Yep! The old saying is all wrong. If
you don't know how your M126E1
howitzer tube is assembled to the
breechring you can get hurt and the
weapon is sure to be permanently dam-
aged.
Every time the tube or cannon assem-
bly is removed or replaced, check on the
distance from the rear face of the howit-
zer tube to the outside face of the breech-
ring.
If this distance is over 5 inches, call
your direct support and don't fire your
weapon until it's fixed.

NOT OVER
FIVE
INCHES

Because if the distance is over 5 inches
it means the tube could be 1 or more
threads from being properly seated in
the breechring.
So what?
So if the weapon is fired with the tube
not seated, the obturator will not make
a perfect seal and there'll be blow-by
which is sure to ruin the equipment and
might ruin you.

HAPPY LIGHTING
You're right ... the lamp housing for your M1 collimator goes on the fritz
more than you'd like it to. The latest word is that the housing is now an organi-
zational repair part. It goes under FSN 1240-066-7095. You'll find it listed in
the newest -20P TM on your weapon.

... HMMA-
S I FILLEP THE You say you've got oil leak-
-REPLENISHER
S ESTERCNIS R ing from the recoil mechanism
for your M1114-series towed or
M123A1 auxiliary propelled
155-MM howitzer?
I If you fill the replenisher
one day and the oil level is
down halfway 24 hours later,
S -. you've really got a leak. It's
L. ,, time for your support unit to
inspect the mechanism and
DR P possibly repair or replace it.
DRPr npetth ecaiI n

IV

This is a sced list of rennt pubs
of interest to organizational mainte.
once peronnel. The lit is compiled from
recnt AG Ditribution Centers Bulletins.
For complete details ms DA Pao 310.4,
Ch 5 (Feb 8), TM's, TA's, etc.; DA Pam
310-6 (Jul 68), and Ch I (Ot 68), SC's
and SM's DA Pao 310-7 (ul 68),
MWO',.

TECHNICAL MANUALS
TM 1-OH23-S. Aug. O0H23.
TM 1-1 H-23C-24P Cl, Sep, OH-23.
TM 3-1040-257-20P. Sep, M9E1 -7
Port Flamethrower.
TM 3-4230-209-12 Cl, Sep. M12A1
500 Got Deton App.
TM 3-4240-258-14 Cl Sop. M17A1
CBR Field Mask.
TM 3-6665-268-10, Sep, Sampling Kit
CBR Agenl M34.
TM 5-2410-214-12, Jun. Tracked
Medium Trodors.
TM 5-3610-235-13, Sep. Hydraulic
Clamp Poper Cutter.
TM 5-3610-237-13, Sep. Printing and
Repro.
TM 5-3610-283-13, Sop. Wire
Stitching Moch.
TM 5-3740-206-15, Aug. Inselicode
Sprayer Skid Mtd GED 40 Gol/Hr Fog.
TM 5-3805-219-20P C4, Sop. Earth
Moving Equip Loaders.
TM 5-3805-219-35P C4, Sep. Dir/Gen
Spt Earth Moving Equip Looder. .
IM 5-3805-239-12, Jul. DED Looder
SEoop Type.
TM 5-3810-289-15, Julo DED 'A C. Yd
12S -Ton Crowler Mtd Crane-Shovel.
TM 5-3825-221-15, Cl. Sep.
Water Distrib.
TM 5-3895-210-12P C2, Sop.
Bathing Plants.
TMS-3895-210-35P, C2, Sep.
Dir/Gen SpI Batching Platl.
TM 9-1005.213-10, Jul. M2 .50 Col
Browning Machine Gun and Mounts
TM 9-1005-249-12. Aug. M16 and
M16A1 5.56-MM Rifli.
TM 9-1005-303-14, Jul, 12-gage
Winchester Shotgun Mdl 1200 Riot
Type 20-in Barrel.
TM 9-1425-500-20, Jul, Hawk.
TM 9-1430-516-12, Aug, Hawk.
TM 9-2320-244-10, Aug, M715 1 '-
Ton Cargo Truck and M725 I / -Ton
Ambulance Truck.
TM 9-2350-300-E5C, Jul, XMI 63
20-MM SP Antiaircraft Artillery Gun.
TM 9-6920-425-14 C2, Sep. edeye.
TM 10-275, Jul, Cold Weather
Clothing and Steeping Equip.

TM 10-500-27, May, Airdrop Rigging
the AN/TPS-33 Radar Set.
TM 10-1670-206-23, C2, Oct. Aerial
Deliv Equip.
TM 10-1670-213-23, C2, Sep, Aerial
Deliv Equip Per Parachute.
TM 10-1670-213-23P, C2, Sop, Pert
Porachule.
TM 10-1670-219-23P, C2, Sop, Per,
Parachute.
TM 10-1670-224-23, C2, Oct, Per,
Parachute Aerial Deli Equip.
TM 10-1670-225-23, C2, Ocl, Pers
Parachute Aerial Deliv Equip.
TM 10-3930-215-25P, Cl, Sap, Goa
Forklift Truck.
TM 10-4930-203-23P, CI, Sep.
Petrroleum.
TM 10-8340-205-23P, Cl, Sep. Tenls.
TM 10-8415-202-13, C2, Sep. Flying
Helmets.
TM 11-1520-217-20P, Sep. CH-54A.
TM 11-2300-369-15-1, Sep. Instal of
Telephone Sels TA-312/PT and TA-
1/PT with Reel Equip CE-11 in XM167
20-MM AAA Gun.
TMI1-5820-535-25P, Sep, AN/TRC-
110 Radio Set.
TM 11-5820-767-12, Aug, AN/URC.
68 Radio Set.
TM 11-5821-259-20, Jul, AN/ARC-
114 Radio Set.
TM 11-5826-227-20, Aug. AN/ARN-
89 Direction Finder Set.
TM 1 1-6730-233-15, Jul. PS-1 and
PS-I-K Still Pic Viewer.
TM 55-450-3, Cl, Jul, UH-1.
TM 55-1500-323-25, Aug. All Fixed
and Rotor Wing.
TM 55-1510-203-20PMD & 20PMI,
Aug, U-6.
TM 55-1510-203-20PMP, Aug. U 6.
TM 55-1510-204-10, C10, Sep, OV-I.
TM 55-1510-204-20, C4, Oct,OV-1.
TM 55-1510-204-20P, Cl, Sep. OV- .
TM 55-1510-205-20PMI & -20MPM,
Aug. U-1.
TM 750-199, Aug, Proceduroe for
Redeployment and Retrogradation of
Acft Componentl Spare Parti and Spt
Equip (Class II(A) and Class IV(A)
Supplies).
TM 750-209, Jul, All Rotor Wing.

LUBRICATION ORDERS
LO 3-1040-241-12, Sep. Compressor
Recip 50 CFM 3,000 PSI M6-IR
Ingersoll-Rand Mdl 6R51B.
LO 5-2420-206-12-2, Jul, Tractor
Whid Indus DED, MED. DBP.
LO 5-3895-215-12, Jul, 165 Gol GED
Keltle Healing Bituminous.

28

LO 5-4310-276-12, Sop, 5 CFM Air
Compressors.
LO 5-4310-334-12, Jun, 175 PSI, 25
CFM Elec Recip Air Compre. Receiver
Mid.
LO 5-4320-252-12, Aug, 100 GPM
Diaphragm Recip Pump Less Mil Std
Eng.
LO 5-5274, Aug. 150 KW and Up
Eng Driven Gen Sets.
LO 5-6115-440-12, Jul, GED Gen Set
7.5 KW, DC, 28V.
LO 5.6115-456-12. Aug, 150 KW
and Up Eng Driven Gen Set.
LO 9-2320-246-12, Jun, M274/
274A1 Light Weapons Carrier.
LO 10-4930-206-12, Aug. Lubricating
and Servicing.

MODIFICATION WORK ORDERS
9-1000-218-30/5, Sop, M107 Gun
and M11O Howitzer.
55-1500-206.30/2, Oct. Instal of
Stainless Steel Cable in lieu of Tie Rod
in Slobilizer Bar Extension Tubes UH-
1B-IC-1D-I H-IM.
55-1500-210-30/11, Oct, Deletion of
Audio Padding from the Interphone
Junction Box CH-47.
55-1510-201-30/1, Cl, Oct, U-8.

TECHNICAL BULLETINS
TB 55-1500-206-20/12, Oct. Insp of
Tailrotor Crosaheod Bearing Retaining
Nut UH-IA-IB-lC-ID/H and UH-
1D/M.
TB 55-1500-206.20/12, C1, Oct.
UH-IA-1B-IC-ID AH-lG.
TB 55-1500-206-20/13 Oct, Insp of
Hydraulic Flight Control Ansy UH-IA-
1B, UH-ID/H.
TB 55-1500-210-20/3, Cl, Sep,
CH-47.
TB 55-1500-210-20/4, Oct. One Time
Insp of Forward Transmissions
11401001 Series CH-47A/CH-47B.
TB 55-1510-209-20/6, Oct. Inp of
the Lower Front Wing Attaching Boll
U-21 Acft.
TB 55-1510-209-20/6, CI, Oct. U-21.
TB 55-1510-209-30/1, Sep. U-21.
TB 55-1520-214-20/22 Sep. Insp of
Main Rotor Hub and Strap Pack Assy
OH-6A.
TB 750-237, Jul, Ident and Handling
of Radioactive Items.

MISCELLANEOUS
SB 700-20, Oct. Adopted ltems of
Materiel and Army Reportable Items.
TC 23-21, Aug, M2, 50 Cal Machine
Gun and Mount, and M60, 7.62-MM
Machine Gun and M122 Mount.

LE~~1_.1 :-:1_..

2

PREVENTIVE MAINTENANCE MUST BE TAILOREP TO CLIMATE ANP TERRAIN
CoVITIOWS AFFECT [SZ
BATTERIES, COOLING SYSTEMS, ELECTRONICS EQUIPMENT ANP LUBE POINTS

5 M T W T F

* FOREIGN OBJECT

SM

6 7
96 97
1314
103 /10
2021
0////
2728
17 //8

F S
4 5
94 95
11 12
/0/ 102
18 19
/OS /09
2526
/11 /16

s~e~p*~e~'~'
/t ~/
~-~

REPAIRABLE
ITEMS -
PACK, HAMPLE
AND HAUL
WiTH CARE.

MAY
T W T

KEEP
REPAIR PARTS
STORE IN
THEIR
PACKAGES
TILL USEP!

JUNE
S M I W T F
12 34 56
52 153 154 15" /56 /57
8 9 10 11 12 13
59 160 /6/ 162 /63 /69
15 16 17 18 19 2C
66 /67 /68 169 /70 17/
12 23 24 25 26 2
73 17f 175 /7, 1/77 /7

KIEP mYoR FWmI6 IPNME(WPIi -Y

7
/-f
/158
S14
165
/21
/72

I

K-

irN

L-JI

WE HAVE THE WORLD'S BEST EQUIPMENT
...7ae 0ae ofit

. .

S I

2829

AUGUST
T I W T

JULY
T W T
1 2 3
123
182 183 /84
8 9 10
189 190 19/
151617
/96 197 198
22 23 24

S M

ijli

3456
216 247 248 241
10 11 12 13
253 54 55 251
17 18 19 2C
260 61 26 2 26
2425 2622

LET SPIT 'N'
HIDE REAL PM.

SI F S

- .

25
298
'2

I o.

PON'T
POLISH

*1

5
73
12

MTW
1
7,f
678
79 80 ?8/
13 1415
286 87 288
2 2122
293294 95
2 2829
300 301 30Z

^^a

N

1

2345678
?06 307 308 309 3/0 3/11 3/2
9 10 11 12 13 14 15
513 3/f 3/5 3/6 3/7 3/8 3/1
16 17 18 1920 21 2
320 322 323 3Z3 3Z4 3 321
23 24 25 26 27 28 25
327 328 329 330 331 332 33:
30
O34
o( 0pPEOp,,

DECEMBER
S M T W T
1234 !
335 336 337 33S 3.
7 8 9 10 111:
11 32 343 317 31
14 15 16 17 18 1

FEI
t.f

SORRY ABOUT
THAT... Y'SEE M!'

pedals on some vehicles especially when the pedal surface is all metal, when
BEADS 0 SAFETY.. FOOT SLIPPED OFF
|oA the pTHE BRAKE PEDAL T
SLIP-PROOF

I
PEDALS

A banana peel on a slick floor is no slipperier than the brake and clutch
pedals on some vehicles especially when the pedal surface is all metal, when
the metal's worn down smooth and when you've got mud or snow on your boots.
When you're operation' a vehicle like a G838-series 1/4-ton or G741-series
3/4-ton truck, take care to clean the mud or snow off your boots before hoppin'
in. And keep this stuff cleaned off the pedals, too.
If your CO gives the OK, you can get
extra insurance against slippery pedals
by having little bumps arc welded onto
the pedal. Just across the leading edge
of the pedal may be enough. This'll give
your boots something to grab ahold of.
ARC WELD A
COUPLE OF BEADS
UKE 5O. GET THE
-- OLD MAN'S
r~I~ APPROVAL.

AR 385-55 (Sep 65), para 25, allows commanders to authorize "additional
devices" for prevention of motor vehicle accidents and you can sure have a
dilly if your foot slips off the brake or clutch pedal at the wrong time.
37

G741-SERIES %-TON TRUCK...

NEW FILTER
SERVICE

IT'S IN THE
ENGINE
COMPARTMENT
"^ ---- .r--

You've got a new semiannual service the sediment bowl of the fuel filter
on your M37B1 3/4-ton truck or every 3,000 miles or 6 months.
other G741-series vehicle. You do if
you've got the fuel filter in the engine
compartment. -

A
IREPLA(E ESVERY
O TMONTHS OR
6,000 MILES

Ch 9 (Jun 68) to TM 9-8030 tells
you to replace that fuel filter element
every 6,000 miles or every 6 months,
whichever rolls around first. This new
info goes in the how-to-do-it section of
the TM (para 139), not in Table III
where you find your other semiannual
PM services. Fact is, those other semi-
annual services are pulled at 3,000
miles or 6 months, a shorter mileage
factor than you've got for the fuel filter
element.
But Table III still calls for cleaning

A new filter element comes under
FSN 2910-455-4033, page 21, TM
9-2320-212-20P w/Ch 1 and Ch 2
(Jul 64).
There's no regular replacement of the
element for the in-tank type fuel filter
found in later production vehicles
(after Serial No. 80042292). This filter
gets service only if it happens to be out
for fuel tank servicing or if you sus-
pect the filter's giving you trouble. Then
para 139c in TM 9-8030 tells you how
to clean it.
If you need a new element for the
in-tank fuel filter, it comes under FSN
2910-735-1316, page 24 in the
-20P TM. This FSN has been exhausted
to 2910-955-2010.

ox"~J~

TRUCK RIN

Dear Half-Mast,
Our TO&E calls for machinegun ring
mounts on some of our 2h-ton and 5-ton
trucks. In the "remarks" section of the
TO&E, it just says "eqp w/ring mount."
There's no UN or FSN or anything else
to identify these ring mounts or to tell
which ring mount goes on the 2V2-ton trucks
and which one on the 5-tonners.
Where do we find this? Also, where's
the info on maintenance and repair parts?
SFC H. N. K.

Dear Sergeant H. N. K.,
Ord 8 SNL A-55, Section 50 w/Ch 1
(Oct 66), para 9, clues you in on the
fact that both your G742-series 2 1/2-
ton and G744-series 5-ton trucks get
the M36A1 machinegun mount.
This item is listed in SB 700-20 (Jul
68) under LIN M74364 and FSN
1005-317-2427.
Its proper name in SC 1005/35-IL-1
(Jul 67) is Mount, Gun, truck, cal .50,
M36A1 w/e. Price, in Fed Cat C-ML-
A (Aug 68), is $611.
TM 9-2016 w/Ch 1 (Jan 64), the
TM for operation and organizational
maintenance, tells you that a component
of the M36A1 gun mount is the M49
ring mount.
Your support's guide on repair parts
is Ord 8 SNL A-55, Section 50. If you
get a new M36A1 mount, make sure
your support gets the packing list, be-
cause it lists some new repair parts
that don't show up in the SNL.

SH/S-Wt

G MOUNTS

YOU MAN YOU GOT
SME UP HERE JUST TO TELL
ME YOU PON'T KNOW THE
LJN OR FSN

I-.--
-V l-'~

Y

q

BREATHER FOR 5-TONNERS

GET
All G744-series 5-ton vehicles with THAT
either the multifuel or diesel engine get MWO
Breather Assy, FSN 2520-272-7965. It APPLIED
goes in the brake and fuel line vent sys-
tem and prevents lines blowing up
from back pressure.
Under MWO 9-2320-211-20/8 (re-
scinded) this breather replaced old
Breather, FSN 2520-466-7518.
If your 5-tonner didn't get that
MWO applied, ask your support to get BREAIHER ASSEMBLY
you the new breather from Ch 2 (Mar FSN 2520 272 7965
67) to TM 9-2320-211-35P.

REGULATOR SHOT? MAYBE

Easy with your truck's generator regulator NOT
even if your tests show it's no good. Your DS wants
to doublecheck it to decide if it goes on the salvage
heap so no firin' it to 'em out of a cannon or
even slingin' it in a truck with a lot of junk. /
There's no more replacement of parts in those
25-amp regulators-FSN 2920-953-9784 or FSN '
2920-335-4677 used in most tactical wheeled
vehicles. DS repair of those regulators is now ,
limited to cleaning and adjustment. If that doesn't ,
make it perk again, it's tossed.

NEW FOR MI51
That's right-now it's 6,000 miles or 6 months for semi-annual PM services
on your M151 or other G838-series 1/4-ton vehicle. The new word's in para
3-19, TM 9-2320-218-10 (Mar 68). This's a switch from the 3,000 miles or 6
months you see in TM 9-2320-218-20, but the -20 TM will be pickin' it up in
a change or revision. You'll be seeing' this 6,000 miles factor for some other
vehicles, too.

DRIVER TESTER
If your outfit has a big job of training and testing drivers, you may need Driver
Testing and Training Device, Portable, FSN 6930-526-3639. For $172 you get
from the U.S. Army Mobility Equipment Command a complete kit to turn recruits
into wheeled-vehicle pilots: Books, reaction time and eye-testing gear, controls
and all are included. You need 110V 60-cy AC to run it.

G741-SERIES
%/4-TON TRUCK..
SBEEP-BEEP-BEEP

That's the signal to right that wrong FSN for Retainer, electrical contact:
horn button cable contact. It's in Ch 1 (Nov 62) to TM 9-2320-212-20P under
FSN 2920-626-0236, but it should be FSN 2590-626-0236. The right FSN shows
up in Fed Cat C2590-IL-A (Apr 68) and will be picked up in the next -20P
change or revision.

MULTIFUEL PUMP HUMP

If the in-tank fuel pump on your 2 1/2-ton or 5-ton multifuel truck is on the
fritz, don't expect support to fix it. There's no kit to be had. Just get a replace-
ment ... but only after you've checked connections and made sure it's not just
a loose wire.
Though some TM's say the pump is recoverable, forget it. Here's the late
info on which of 3 new pumps goes with what vehicle:

The three listed here replace old standby FSN 2910-765-9594. See page 10,
Ch 2 (Apr 67), to TM 9-2320-211-20P and page 27, Ch 3 (Sep 66), TM 9-2320-
209-35P.

NO KNACK-JUST FULLY PACKED

IT'S A SKILL ... LIKE
i# PUTTING THE EXTRA
\J- TOOTHPASTE
Sy'SQUEEZEP OUT,
S"" BACK-INTO-
THE TUBE!

You have to develop a lot of hand action to pack grease into a bearing. This
takes experience -and elbow grease.
It doesn't really matter whether you develop an "old pro" knack for the
wheel bearings in your vehicle, tho. There's a bearing lubricator, FSN 4930-
704-1852, in the lubricating kit of your No. 1 and No. 2 Common Tool Kits.
This little gem does a good job of getting grease into every nook and cranny.
That's because you're purging out the old and putting in the new with the pres-
sure of a grease gun.

GIVE TM 9-273
A LOOK-SEE FOR
MORE HINTS

42

PROBLEM CASE #100001

WRECKER FLASH
QUIET.
osI'M GET TING
Calling all oaperatars! I'MGE TING
"!AN ALL- POINTS
SBe on the lookout for a missing BJLLETIN O CN
boom-sheave-pin locking plate on t M SUPER
your 5-ton 1M43 and M543A2 SLEUTH WRIST
wreckers. RADIO.
Be wary. It's believed plates
were removed during replacement
of boom sheave pin or omitted at
time of manufacture.

SOLUTION CASE #100001

1. Fabricate a new plate from 1/-in,
1015 or 1020 steel, 11/2 by 3/4 inches
and weld to the sheave support pin
boss.
MAKE A PLATE

Y4

2. Locate the plate 9/16 inch above
the center line of the pin hole so the
flat on the sheave pin will engage
against the locking plate.
That's all, except see TB 750-981-1
(an 68), page 68.

YOU CAN GO WITH LESS

NEVER
ANINC)
"THE PIN.
WE PON'T
NEEP IT
F. -T.,

I;:_ -J^-

Your M48 or M60-series tanks might have
a problem with the shell stop fastener pin
assembly. You're likely to shear it off at the
right or left hull ammo racks when you traverse
the turret.
Should this happen, don't bother getting a
new one. This pin and chain are not needed
and you can remove 'em whenever you want.
That way they won't cause you any trouble.
44

IE PIN.

GASKET SAVING NOTE

NOT QUITE
PU TE GOLD,

Listen up on this, all you mechanics
who might remove the magneto on an
M48A2 tank or other vehicle with a
similar engine.
When the magneto (scintella) FSN
2920-593-6456 (7974215) comes off,
there's a gasket with it, Gasket,
magneto cover, FSN 5330-774-4849,
(7744849).
Now this l'il gasket don't look like
much so some mechanics throw it away.
Well, it turns out the homely looking'
l'il silver gasket costs your U.S. Uncle

$2.37 per which is just too much green
to be throwing away.
So cut it out, hey! Include the gasket
when you turn in the magneto to your
support for repair on a DX deal. Re-
sult: Everybody happy and nobody will
have to come up with the $2.37.
This applies to M41A3, M48, M48A1
and M48A2C tanks; M42A1, M53 and
M56 self-propelled guns; M44A1 and
M55 SP howitzers and the M8A2
tractor.

M113AI PIVOT BRAKE KITS
GET THIS
S0 CAN'T NO Having a rough time getting the
GET THE SWEAT! brake assembly parts kit shown on
KIT^. page 185 of Ch 4 to TM 9-2300-224-
20P/3 (Nov 64)? Try FSN 2530-873-
6912.
If the repair kit is temporarily out
of stock your best bet is to order brake
S assembly FSN 2530-999-1998. Al-
S though this brake assembly is now listed
as a non-supply item in TM 9-2300-
PARTS KIT 224-20P/3, it will be shown as an au-
FSH 2530-
999-1998 theorized repair part in the new TM
8 9-2300-257-20P.
45

On all models the gun control cable (it's called gun switch cable in some
manuals) goes in through a cable connector on the right side of the control box.
All you do to wire in the gun is remove the terminal screws from terminal strip
T1 (located on the floor of the control box), hook up the right lead to the right
terminal and anchor the leads with the screws. The leads are color coded and the
terminal strip connections are numbered.

GUN CABLE CHECK
Two or 3 cables, depending on which set you have, are POWER CABLE
permanently attached to the gun. But the only gun cable you
have to wire to a terminal strip is the gun control cable. W
For example: CABLK
The larger, black cable is the gun's welding power cable
and it simply plugs into the control assembly.
On the older models the gun's ground cable also hangs GUN
from the gun. But, all you do with that cable is attach it to a CONTROL
terminal on the side of the control box. CABLE

SAFE/TIGHT CONNECTIONS
All lead, hose and cable connections must be good and tight. So check
connections for tightness as you make 'em. Also, the waterproof cable con-
nectors and bushings which hold and protect the cables and hoses passing
into the boxes must be tight to help keep the boxes clean and dry.
And, first and foremost before you make any connections be sure the voltage-
control switch on the control box and the generator power switch are on OFF.
OK now that the prelims are out of the way here's the $$$$ word on
wiring the gun-
47

GUN CONTROL CABLE
Insert the cable through the cable con-
nector nearest you on the lower right side
of the control box. Connect the cable's 6
color coded leads to T1, like this -

Terminal

HOOK-UP ROUND-UP
Now on to the other wiring jobs and connections needed to get your single
box MIG welding set working. All connections coming up (like the 115-volt
cable) are on the left side of the control box.
48

115-VOLT CABLE
This is the other wiring job you
have on this set. The cable ener-
gizes the control panel so al-
ways make it the last connection.
Wire the 115-volt cable to ter-
minal strip T2, located on the floor
of the control box,. Bring the cable
into the control box through the
cable connector nearest you and
hook its 3-color-coded leads to
T2--

Lead Terminal

GUN'S POWER (ABLE
Push the cable through the larger (able
connector on the side of the control box.
Inside the box you pass the cable Lthrough
the weld-current-relay and screw the cable
to its adapter (right under the weldi 9 to n
toctor).

SINGLE BOX HOOK-UP

GROUND WELDING CABLE

49

CONTROL BOX/ARGON/ CONTACTOR/GENERATOR

.IKE BEFORE
)U AMAKE ThE p -

GUN CONTROL CABLE
Push the cable through the cable connector on the lower right side of the control box, and
connect its leads to T1, like this -

On the Sigmette model
(FSN 3431-837-5574)
lead Terminal

On the SWM-9-A model
(FSN 3431-972-7672)
lead Terminal

White

Orange

Cable entry and hook-up may vary slightly in
some older sets Always check the TM

GUN'S GROUND (ABLE
Attach to the ground terminal on the
outside of the control box. The terminal
is equipped with a wing nut to hold the
cable.

REGULATOR

WORK PICK-UP CABLE
Pass the single lead cable through the
other cable connector on the lower end
of the control box and connect it to
terminal 8 on TI. The other end clamps
to the workpiece.

GROUND WELDING (ABLE
Connect from the negative terminal
on generator to a good ground on the
workpiece.

121/2-FOOT WELDING CABI
Pass one end of the cable through the
uppermost cable connector on the side
of the control box. Inside the box you
pass the cable through the weld-current-
,elciy and attnch the cable to the gun
powei-cable ierminal ;ust inside the
o9hi side woll of the -ootrol box.
Pciss "he other en6 of the cable
.irouah the center cobje connector or,
the (i ght side of the welding contodor
and (onnect it. to the contactor's nega-
tive terminal.

CONTACTOR CABLE
The cable comes attached to the center cable connector on the
lower end of the control box. Push its free end through the cable
connector on the lower, right side of the welding contactor and
connect the cable's 3-color-coded leads to terminal strip T301
(located on the back wall of the welding contactor), like this -
Lead Terminal

White --TZ-

re5n 3-WELDING CONTACTOR

And, that's the last cable you have on this control box.
TWO BOX HOOK-UP

115 V (UCONTACTOR WUKK
CABLE CABLE PICK-UP GN
CABtLE ABL GROUND ABLE CABLE PGUN

MIG RIG TIPS
Remember, you need reverse polarity with MIG welding to get deeper pene-
tration on the base plate, and to avoid burn back in the guide tube.
Check your generator's operating instructions for the reverse polarity setting.
The sets operate on 115-volt AC or DC power. When a generator isn't equip-
ped with a 115-volt receptacle the cable can be hooked-up to standard 115-volt
shop current.
On the Sigmette model (FSN 3431-837-5574,DA Contract 11-199-Ord-534),
however, the 115-volt supply source must not be earth grounded or hooked
up to either side (power or ground) of the welding power supply source.
52

Make sure the 115-volt power receptacle, or
power cord adapter for the 115-volt cable, has
a good electrical ground.
The flowmeter on the argon regulator tells
you how much argon gas is going to the gun.
And, the regulator's pressure gage tells how
much pressure you have in the argon cylinder.
Treat the argon regulator c-a-r-e-f-u-l-l-y.
Never yank or grab the regulator by the flow-
meter tube guard.
Before installing the regulator, open the argon cylinder just a crack to blow
off any dirt.
And, never stand in front of the regulator when you're cracking the cylinder
valve.
Just before installing the regulator be sure the flow-adjust valve is turned
(clockwise) off all the way.
When you're installing the regulator, cradle it in one hand and screw the
inlet connector nut to the argon cylinder valve with the other hand. Tighten
the nut carefully with a wrench.
The regulator must be installed with the flowmeter standing upright.

CABLES

MOVING

PUBS

I

II 1

wrrp ,*T

+ Take care you have no kinks or sharp bends.

WNICS, Set up your rig in a well ventilated area.
TUST Keep it away from toxic or flammable fumes.
1hR i Always wear your protective gear. And, on
long jobs check yourself frequently. MIG weld-
ing means heavy ozone fumes and, the stuff's
-i dangerous health-wise. Welding experts recom-
mend a 10-minute fresh-air break out of each
S welding hour. For important scoop on ozone gas
poisoning and first aid on ozone problems see
TB Med 256 (Jan 66).

When you're switching job locations disconnect the power
and ground cables from the generator. And, coil all the cables
for easy handling, cable protection ... and your safety.
Disconnect the argon regulator from the argon hose and
from the cylinder, and handle the regulator like fragile stuff.
It's OK to hand-carry the M'G set for a short way, but if
your next job is-a good way off, always pack the set in its
shipping box. The box protects the set from damage, and
makes it easier for lugging, loading and transporting.

L ONLY PACKED FINE, BUT WHAT
IT FOR A LOCAL ARE THE LOCAL
MOVE. CONDITIONS??

Keep your pubs handy. TM 5-3431-219-15 (Aug 65) for
the single box set. TM 5-3431-208-15 (Jul 63) and the -25P
manual (Jul 63) for the SWM-9-A set, and the Linde manual
and parts list for the SIGMETTE set. And, of course, the pubs
for whatever welding generator you've got.
54

NUT RESTORER sa^
Dear Editorl rd ty
i've made a tool that will restore slotted type
l5f.lcking nuts to their original condition
I used a booking n h the nut fits and drilled the
used a bolt on wh t r the self-locking -
head of the bolt so it would fit over t slf-loking
end of nut to be (You can also use a steel D
bar and drill it with all siles. r or ring around
if there's a rubber wahr o check for deep
the top inside of the nut, be sure to check for deepss
cuts or breaks before restoring If it's bd' toss
h out the tool over the self.locking "t
Then youstord and tp it a time or two with a
to be restored an veh
Yeoll fin thes flcking nuts on your vehi- /
hammer.
eyo 'll find tued s, ecillY where Safety is a S PE-
es T h e y rer u s e d 0p 2 1 3 . .

factor, such as on drive sft Rihard H. Western
Aberdeen proving Ground, Md.

NEW HEATER SPRING

A switch in time may keep your
Model BT 400-40 FSN 4520-792-8257,
and BT 400-40-1, FSN 4520-930-9474,
duct-type heaters in operation.
The spring, FSN 5340-940-7917,
that's now on the engine exhaust rusts
and you have to replace it often.
You can lick this problem by replac-

GET
THIS
SPRING

ture's code 90598 Part No. TM
3955A.
TB 750-971-2 (Apr 68), EIR Digest,
is your authority for ordering it until

ing it with a new corrosion resistant you see it in a change to TM 5-4520-
spring, FSN 5340-824-5267, manufac- 208-25P.

SNO BOLOGNA
WHOS Your Model S-4 Sanitary Scale Com-
O -MAINTAINING pany meat slicing machine, FSN 7320-
THE SLICERF 222-4176 and FSN 7320-222-4177,
may be about to go on the blink because
of a bad worm gear. Take it to your
support and they'll replace the gear
with a new one free of charge if your
machine has one of the bad gears.

kA Wir, ov

CHARGER NEW? WE
WHOA-HOLD KEEP
CHARGING'
'EM...
METER-TEST

EACH

OUTPUT

POLE

You with that new battery charger
- got a 2KW GE or Eagle, FSN 6115-
075-9123, 12-volt?
Before you hook up a bunch of bat-
teries and ruin 'em, better check those
outlet plugs for reverse polarity.
The trick is, have your radio genius
or kilowatt custodian take a TS-352
meter, set it in the 50-volt range, and
get a polarity reading (any standard
multimeter'll do).
If the outlets marked (+) turn out to
really be (-) and (-) ones (+), you
need a wire-switching job between the
generator output and the distribution
panel. But be sure you get to points
A-1 and A-2 right where the juice comes
out of the generator itself otherwise

you'll make a direct short and burn up
your rig.
Don't get rushed and start up the
set before you've had somebody else
double-check the job like testing the
polarity to make sure the labels match
the output.
- I I _,0

\,, HOLD THAT PUB!

WHO-OO-O-o-o-ah!! Like it says in DA Cir 310-39 (Jul 67), don't heave out
that TM 5-2410-210-15 (Aug 60), on IHC TD-6 Full-Tracked Tractor. It's still
good the DA Cir 310-30 (Apr 67) notice to ashcan it was all a mistake. So
save it along with Changes 1, 2, and 3. Like gold.

URGENT 45-KW FIX

GET SUPPORT
TO MAKE L
NEW MOUNTS ALL
EA

Your 45-KW Stewart & Stevenson Model 52300 generator may look healthy,
but if it's wearing a serial above -1881, it could have a real bug gnawing inside
... so stop the chewing.
The bug is that the noise-filter-choke brackets break after 800 hours or so,
shorting out the set. Support can put the blocks to that.
The fix is to take out the noise-filter-choke and make new mounts out of
1/8-in thick angle iron. Either 7/8-in width (FSN 9520-277-5984) or 1-in width
(FSN 9520-288-1106) works great. Aluminum 1-in angle (FSN 9540-145-5752)
is good. Tell your support to requisition 20 inches for each generator.

UNTIL YOU GET

FIXED THIS'LL
HAVE TO DO!

You can do somclhing about the scores IFSN
5305-273-7372 or 5305-050-9229), working loose
from the retaining plate of the compressor diaphragm
o/ f your Model CDR 70,000 Curtis Automotive
Devices, Inc., delousing outfit, FSN 4230-078-5455.
You remove all of the screws from the diaphragm
retaining plate. Then coat the threads of each screw
a with an activator-primer, FSN 8030-980-3976. It
Comes in a 6-oz spray can. Be sure to follow the
S I directions on the can.
S. I After the primer dries, apply sealing compound,
COAT THESE SCREWS FSN 8030-823-7917, to the screws. Put them back
Sin the plate and tighten 'em. That should do the trick.
57

DOUBLE DUTY

So you're operating a rough terrain
crane that has two hourmeters but
only one DA 2408-1 for recording
hours of operation? No sweat. Just
draw a diagonal line across the box in
column b. Record hours for the crane
itself above the line hours for the
crane carrier below. Like so:

A TYPE LOS OI
f7P.LYv "MONTY.. CR

NTYI l MILES ADDED

0164 3~ /634

A TIMING TURNAROUND

SMake a note about what TM 5-2805-204-14 (Jul 65) says
on page 32, Fig 25, about firing order for 2A042 10-HP
Engine. The order is 1-2, not t'other.

5=9 -REMOVER
ir "Qy*. ., o,
II A 'I J ~

5-KW HOL-GARS BOIL
COMING
AHMB3W

0 a'','

Oil starvation messes up a good many Hol-Gar CE-56-AC generators and
the secret is something the pubs don't tell.
TM 5-6115-312-15 on this set says the crankcase takes 3-1/2 quarts but
the oil filter soaks up another quart, and that's the catch. The set can run out
of oil quicker'n the 10 hours it's supposed to last between checks, or overheat
and plain burn.
One cure is to run the engine 20 minutes to a half hour after an oil change,
then add another quart, making 4-1/2 quarts in all.
It helps to have a visual check on oil
level, too, for a run all night or 'round
the clock. To do that, you take off the
drain-line elbow of the oil-drain line
and apply this fix:

Cap the opening finger-tight with a pipe cap. Then when you check the oil
level, you ought to see it about 2/3 of the way up in that nipple; if not, add.
When you make a dipstick check on oil like the LO says, have the letters
on the stick facing the engine front. and no screwing the cap down on the
filler neck.
And out of the tail of your eye, if the weather's above freezing, look to see
the flywheel shutters are open good 'n' wide. But let nobody take 'em off.

Next light the fuel in the igniter cup and
swing the cup to the flue compartment so
II II preheat the flue.

You don't need magic i and or an'
orthr rricks to lire up )our aItcr-model
immersion heaiers. But jius be careful
rhat sour igniter cup dosn'r runneth
o\ -r.
Before iou use the cup. make sure
it has the wick and the wick retainer
spring.

Unscrew the vent plug at the top of the
fuel tank and swing the igniter cup below
the fuel valve of the fuel tank.

i --n,+ + + u ^ -I -.-..
L.

Now open the fuel valve until the igniter -
cup is /4 full of gasoline. (This may vary -
with the temperature you'll need more
gasoline in cold climates) 1 .

jaI c .*i

1 l

a_ ,, ] ignite from the burning cup.
Do not put your face over NOW... THEN... SOON...
burner chamber or there
may be a flash in the pan.

ADJUST FUEL TO A DRIP, DRIP
.. JUST LIKE A FAST CADENCE.
S yf RETURN IGNITER THERE SHOULD BE A WHITE YOU HAVE
TO THE FLUE HAZE COMING OUT OF THE STACK. HOT WATER

SAFETY FIRST
The same safety tips goes for this type of heater as for the type that uses the
lighter.
You never let the fuel drip into the heater before preheating the stack or
lighting the burner.
You make sure the fumes are piped outside if heater is used in a building
or tent.
Look for leaks or spilled fuel. Wipe off the fuel from the outside of the heater.
Check to see that the corrugated can is filled at least 3 inches above the top
of the combustion chamber and about 6 inches below the collar assembly. You
can heat approximately 20 gallons.
Always wait until heater cools before you do any maintenance.
61

ONCE AGAIN ON RECORDS RULES IT'S...

The wintry winds are restless, and
the changes blowing your way include
Change 1 (15 Aug 68) to TM 38-750
-effective I Jan 69.
This updates your guide on equip-
ment maintenance and historical rec-
ords. It's the latest Army Equipment
Record Procedures-streamlined,
modernized and refined (except for the
few designated units using the CS3 rest
edition that's more streamlined yet).
When your copy comes 'round the
bend, watch especially for these major
face-lifts:

COMPOSITE ITEM (HECK
The.new rule on logs for composite items calls for a
checkout on the log for any end item that has other end
items as components. Here's a (large) thumbnail version
of the rule:

and communication end items (400000 category):

1. Composite end item is required to have
a complete log as spelled out in Ap-
\ pendixes III and V and paro 4-22.

2. Electronics and communication end
items that are components of a com-
posite end item in this same category
need only MWO inserts in the com-
posite item log (DA 2409 or DA 2408-5
as required in para 4-22). (The log
would need an index, DA 2408-10, but
DA 2408-3, 2408-7, 2408-8 and non-
feedback forms like DA 2408-10 for
components and DA 2408-14 would
not be initiated or maintained for the
component end item.)

4. Code changes in Appendix I include
major revisions in utilization (Table
7), reasonfortransfer (Table 16 and
equipment loss (Table 171 codes.

5. Revision of Chte n
records coordi Opter on am5 ,
records coordinates these rues with
general equipment uses of r ith
-u~mn use a St^

3. When they are components of com-
posite end items of other categories,
electronics and communication
(400000) category end items get all
records required on their own category
lines. (Appendixes III and V and para
4-22).

63

b.For everything but electronics and communication end items, all forms listed on category lines
(Appendixes III and V and para 4-22) are required even when the item is included as a compo-
nent in a composite end item. (Logs for all end items induded in the composite item would be
kept in one log binder with a DA 2408-10 index.)
NOE h nyecpint hs ue sa n tmta

/ DA 2406 Change requires entries in
columns 101k through lt for items reported
on DA 2406 (App III) even if no ESC has been
published.
4.3 Rendeix 1b
'-,-s-- rops s mmulo I

DA 2409 Current status entries on
MWO's (as required for DA 2408 also
required for DA 2409 A28-s also
4-20c(4) (c. 24 section pra

197 Palo 3'' 1O ii heM ctualO'
ininied nianhOuss tra$ Vole
ne i rnkfo~" to be reTOO"eo tor
n IS -isw eited9"- t rons ""t
OYda IS vhen lata s a e incuding
l re a re 'i5 0 na nenance and
Rwes file e0ing at aSite sea ions.
required rep and returnto use,
degot lepO'li

Other general c
for US. of changes include provisi
o us equipmentoeast pr records
Time invent records for snecia, ons
andi operational or .n
r studies a od general Udo a inOetenance
ton in the te cross references and clarifica-
tccual the st. You'll need it to keep
e score on your equipment. eeon

As you were, Mr. Handreceipt holder.
Paragraph 3-4b Ch 1 (May 68) to AR
735-35 dropped a couple of lines at the
printing shop. The original handreceipt
file (or copy) still belongs to the prop-
erty book officer. And, the H/R holder
gets the duplicate copies.

Supt 7'WX
Property-book types keep an eye out
for the latest scoop on Change 1 (May
68) to AR 735-35. The info went out by
DA TWX 884511 (21 Oct 68), and
should be reaching you soon by way of
your local supply SOP.

40-mm eS
& SmoFe A4mmo
The 40-MM CS cartridge for the M79
grenade launcher is: Cartridge, CS
XM651E1. Handling, firing and safety
scoop on the round is covered in TM 3-
1310-243-10 (Sep 68). Cartridge, CS
XM674, and Cartridge, Red Smoke,
XM675, can be fired by the M79, by the
AN-M8 pyrotechnic pistol, or fired by
hand. These 2 cartridges are covered
in TM 3-1310-244-10 (Sep 68).

Remember, the initial handreceipt
date on the back of the property book
page (DA Form 3328) must be up-dated
when there's turn-in or issue business
between the H/R holder and the prop-
erty book officer, or when a new man
signs for the H/R items. That is, the H/R
date on DA Form 3328 must jibe with
the date of the latest transaction shown
in the H/R balance column.

,4 ate 7om Voa
You'll not need a pencil and paper to
figure what the Julian date is if you have
the combination Perpetual and Leap-
year Julian Calendar. FSN 7510-226-
5401 will get you a package of 50. You
find it listed in the GSA Stock Catalog
IL/Part II (Oct 68).

VW09 Fnwaumd
as44 17 O#6e Pa4
Search no more for a frame to replace
that busted window on your 21/2-ton
truck's M109 van body. The whole works
comes together as Glass, Assembly w/
Weather Seal FSN 2510-040-2087. The
nomenclature's been updated. Quote
Fed Cat C2510-IL-A.

Would You Stake Your Life on
the Condition of Your Equipmnent.

hi~
0 ILI

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