PS Magazine Issue 133 1963 Series [133 ed.]

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Citation preview

AHHH •.. THERe'S tCE' ON THE SI>I~E' ••• ~ME' GOOF-BALL.

PEl>SO/'INE~ CAPl>1el> ~KIDDED... Z HEAP ~ME' HIGH PANK V. I.P.

WAS IN IT, TOOu.

D E UIPMEN l' M IN A N Q R M U S ' B I lA D Y ' 0 FIGH,

" of yo ur A uipmen t takes a "b at to no thi ng Ma int en an ce Trainin grmy .e9es, says flatly tha t k ac~ se at_ /rcr uip me nt Co~b AR ~50-1 , Army Pc: h9 k f.9 as tP' po rta nt ine d an~ rea dy IS as im g soldiers tra 'n 19 trng sha pe . pln ee w kno yo w rs ur CO No w you kno the co mm an de ean : knows, yO w: Menu ~:erg ke pt r S ~ny.d all up the line kno ea u,pme~t will be ces sar y, An d, when ne

y~ eq

me nt an u, YOUr eq uip

d

yOur ou tfi t can

fjg ht -a nd win

.

MEN AND EQUIPMENT MUST BE READY TO FIGHT

P5

Pubhshed by the Oeparlment of the Army lor Ihe

InlormatlonoIOF~anlZ3honalminnten;lnceandsup

ply personnel 0 sl"but on s made throu~h normal pub ,cat on chann els Wthm limits 01 Jvalab,l,t,

older Is"elmaybeobta,neddrectlromU S Army Manteo"n e Boa d Attn PS Ma€une Fort Knol K e nlUC~Y

,HIi

40121

PlEVENTIVt MAINTENANCE

Issue N o. 1 33

GROUND MOBILITY

MONTHLY

1963 S.ri.s

14·27

TRACKS

flas/lGtMtallm

14-11

MI0711M1M IIO

11 GEN ERAL

MetJI Dit Sets 11 AlltifrttU . .21

MlssiitMowes

22·21

S()attTIres Mud f brps Tire Gate

AIR MOBILITY PvbIlQtim

37

Col~~her]I.U

FIREPOWER HM 41.ft ItIke&tules 51 3.s.tn lamcIw 51

37-46

S.!O/f.I3J

47·59

GENERAL AND SUPPLY

Maintenance of your Army equipment takes a "back seat" to nothing. AR 350-1 , Army Training Policies, says flatly that keeping equipment combatready is as important as keeping soldiers trained and in fighting shape. Now you know, your sergeant knows, you r CO knows and all t he command ers

up the line know: Men and equipment will be kept rea dy. And, when necessary, you, your equipment and your outfit can fight- and win .

44-45

==' :

PS

Published by the Depntmentol the Army lor the Information of OrlliniZalional mamtenlnceand sup ply personnel Dstnbuton 5 made through normal publ cation channels With n Ilmts 01 avallab,lity older ss~es may be obtamed dorect lrJm U S Army ~a ntenance Board Attn PS Magatooe ~ort Kno~ Kenlucky40121

lHe; n£VE1ft1V£ MAINTENANCE Issue. No. i l l

'4-11

II GENERAL It $pateT/ln 2OL'ICOL TO USE FOI'? THE PQOTECnoN ')O

I

in an unheated shelter uneil you can change the accuracy or the general allaround performance of the ammo. pick it up on your return trip. Try to keep the ammo about the same This sweating problem is something temperature as the weapon. Carry it in a bandoleer with extra clips and magazine in the outer pockecs of your parka. Like always- it pays to check the ammo for oil and preservatives, which shouldn't be there in any kind of weather. And, of course, ice and snow should be wiped from the ammo before you load your weapon. When firing your rifle or machine gun on days when the wind is kicking you'll also run into when you take your that white stuff up all over the placeweapon into a heated shelter for cleantake time out often to check and dean ing and lubing. In this case wait for out the receiver. This'll go a long way about an hour or so for the sweating toward preventing stoppages caused to stop and then go to work on the by snow clogging or melting and freezpiece. ing in the receiver. Before firing your weapon, give it a careful going over- real carefulbefore you sq ueczc the trigger. Make sure there's no snow or ice in the operating parts, sights, trigger andabove all- the barrel. Snow or ice packed in the barrel could cause it to burst on the first round fired. Go through a complete dry run and work all moving pacts. If any are frozen, try to warm them slightly and then move 'em, gradual-like, until they're loose. When firing, don't let the hot parts Another thing to remember is that of the weapon come in touch with moisture freezes to cold objects ... and snow, if you can help it. The melting that goes double for bare sweaty finsnow will form ice while cooling, and gers. So, be extra careful when you're t,r ouble will be knocking at your door working with "cold-soaked" weapons again. and wear contact gloves if possible. It's awful easy to leave a little skin On the ammunition side of the fence -the situation is not too bad. on the metal or pick up a quick case Extreme cold weather doesn't gready of frost bite. S4

\Vhat it boils---or freezes-down to is that firing in blue cold arctic conditions means your preventive maiotenance has gOt to be a round-the-clock proposition if you and your weapon

are going to survive. OK. Here's a quick r undown on some of the things to watch for on your sma ll arms when flcing in subzero temperatures.

Malfunctions and extreme cold or fouling by ice and snow. The carbine is the most sensitive weapon in this group. It's the hardest to repair because parts are small and rough to handle with g loves or mittens.

gas cylinder lock screw freezes. The sear, firing pin and ope rating rods bust real easy. Defective or plugged magazines cause plenty of damage on the BAR. Keep magazines free from snow.

breaklalglesllll!dule·tO·.T~hieiiijM'lii

performi~aright la~nc~e~O~f~ho~th~O~fr~:~=;iliii~~:]

The overa ll these newer weapons good and they stand up to cold weather better than M 1, Carbine, BAR and older machine g uns. However, watch Out for breakage of recoil parts.

Here's a tip on things to come ... 4-02 plastic tube of Lubricating Oi l, that'll be well worth remembering. Semi-Fluid , is supplied as a basic issue The new M85 machine gun-which is with this weapon under FSN 9 150-889Slatea' to replace the present .50-Cal. 3522. Remember:The semi-fluid lube M2 turret-type MG's on some vehicles is strictly for the M85 machine g un and -gets a little special treatment. you use it only when it's real coldTo make sure things work smoothly, like from _10 0 and below. even w hen it's a fri gid _65 0 below, a 55

I

These two workhorses should be well lubed because of all the moving parts. However, in a pinch, if LAW's not available, apply a general purpose l~be like PL Special before firing. Both guns have a high breakage and malfunction rate in extreme cold

weather, so keep repair parts handy. The most common problem is short recoil caused by the bolt not recoiling fully to the rear. If this happens, applying immediate action will get your gun going again-and as the gun warms up the problem should slackoff.

The second big thing to watch is freezing and hardening of the buffer which causes slam-bang action and rapid recoil. If this happens, Stop firing immediately. If you don't, something's gotta give ... and you'll end up with a potful of busted parts.

NO MAoJOP PP09I.EM>. I PEE'I.ED FOP CONDENSATION AND

ICE"~PT~l?~~t'.NG

The big worry here is the ammo and, because the propellant burns real slow in extreme cold, a rocket launcher makes for touchy shooting. For one thing the back-blast area (See TM 9·2002) is about tripled. Then the loader and gunner want to wear masks and gloves as protection against burning propellant. 56

With the 3.5-in launcher, make sure the rocket is dry MUST BE DRY AND FREE FROM and free from snow and ice a1,!.d that the safety band on 1(1 AND SNDW the fuze is left in place until just before firing. If you remove the band too soon before the rocket is loaded into the launcher, the bore-riding pin moves co the " j locked position and leaves a hole for moisture to seep into. ,.....-SAf£lY--8AIIO.....::,.0II~~~

.-V

This means jf there is a holdup in firing, the moisture can enter the fuze cavity, freeze and leave you with a dud at the target.

FUZE MUST STAY IN

PlACt UNTIL JUST 8ff0Rf FIRING

This baby has limited use in extreme-cold weather_ Rubber parts-like the fuel hose-become rigid in sub-zero conditions. One wrong snap and you've got two short hoses instead of one long one. Two or three ignition charges should be used to make sure the fuel ignites. Thickened fuel is less dependable so, if possible, check sample batches first.

S:PACSP

J usc in case you didn't know, that Ii'} piece of plastic that came with your small arms cleaning case (7267754

... FSN 1005·650· 4510) is a cleaning rod spacer that's supposed to be used like so: It keeps the cleaning brush and the

cleaning rod swab holder section lined up right when you have 'em in the cleaning case.

8~~ AND S:WAS

HO~P

SSCTION '-INEED

uP

WHEEN

C:L~NING CA5fEJ

Maybe you don't like PT. But even if you recoil from exercise, you've still got to exercise your recoil. The recoil mechanisms and replenishers on tank cannon and artillery have got to be exercised like it says in TB ORO 303 (Apr 55) and Change I (Aug 58). That means at least once every six months unless it says otherwise in the TB.

There's a good reason for exercising When you exercise your recoil you your recoil. The interior surfaces of the know it's OK and that might be pretty recoil mechanisms are highly polished. comforting information to have if someIf you let the packings on the cylinder body picks up that red telephone. walls and rods get dry, these highly Support units are responsible for expolished surfaces will corrode. ercising recoil and replenisher equipOn 'ruther hand, regular exercise of mcnt, but using units arc responsible the recoil practically eliminates this cor- for seeing that they get the word when rosion by rubbing on an oil film be- the exercise is due. tween the packings and the surfaces There's nothing wrong with using they contact. This makes the recoil last units putting the recoil through its callonger and work better. isthenics, provided its done under the Exercising the recoil is also good for supervision of support. the replenisher. Your replenisher may If the weapon's in storage, mark in [ell a lie about the amount of oil it the weapon record (in' your OA Form contains if its piston gets frozen. The 2408-4) the date it was last exercised same thing can happen if the indicator and stencil on the gun tube in letters at tape breaks or gets unhooked from the least ~ inch tall. Also, put a dated tag piston. on the recoil mechanism. You'll find S8

Maybe you don't like PT. Bue even if you recoil from exercise, you've still got to exercise your recoil. The recoil mechanisms and replenishers on tank cannon and artillery have got to be exercised like it says in TB ORD 303 (Apr 55) and Change 1 (Aug 58). That means at least once every six months unless it says otherwise in the TB.

There's a good. reason for exercising When you exercise your recoil you your recoil. The imerior surfaces of the know it's OK and that might be pretty recoil mechanisms are highly polished. comforting information to have if someIf you let the packings on the cylinder body picks up that red telephone. walls and rods get dry, these highly Support units are responsible for expolished surfaces will corrode. ercising recoil and replenisher equipOn 'tuther hand, regular exercise of ment , but using units aTe responsible rhe recoil practically eliminates this cor- for seeing that they get the word when rosion by rubbing on an oil film be- the exercise is due. There's nothing wrong with using tween the packings and tht: surfaces they comact. This makes the recoil last units putting the recoil through its callonger and work better. isthenics, provided its done under the Exercising the recoil is also good for supervision of support. the replenisher. Your replenisher may If the weapon's in storage, mark in tell a lie about the amOunt of oil it the weapon record (in' your DA Form contains if its piston gets frozen. The 2408·4) the date it was last exercised same thing can happen if the indicator and stencil on the gun tube in letters at tape breaks or gets unhooked from the least -% inch tall. Also, put a dared tag piston. on the recoil mechanism. You'll find 58

the dope on this in paras 28 and 29 of TM 9-300-3 (Aug 63) and para 10 of

TB ORD 303 (Apr 55). You gotta use some common sense on this exercise deal. If the weapon's been fired in the last six months, that counts as exercise for the recoil. ]n fact, that's the very beSt kind of recoil exercise.

TANK RECOIL LEAKS

I How much is too much when it comes to leaks in the hydrospring recoil system of your tank or SP gun? From now on you don't have to wonder! TB 9·1000·224·20 (Oct 61) spells it out for you. If leakage is more than three ounces of oil in a 24 hour period, that is considered tOO much and you should holler loud and clear for your support maintenance. That goes for all kinds of tanks and SP vehicles with hydrospring recoils, except for the M56. 59

the dope on this in paras 28 and 29 of TM 9-300-3 (Aug 63) and para 10 of

TB ORD 303 (Apr 55). You goua use some common sense on this exercise deal. If the weapon's been fired in the last six months, that counts as exercise for the recoil. ]n fact, thac's the very beSt kind of recoil exercise.

TANK RECOIL LEAKS

How much is too much when it comes to leaks in the hydrospring recoil system of your tank or SP gun? From now on you don't have to wonder! TB 9-1000-224-20 (Oct 61) spells it out for you. If leakage is more than three ounces of oil in a 24 hour period, that is considered tOO much and you should holler loud and dear for your support maintenance. That goes for all kinds of tanks and SP vehicles with hydrospring recoils, except for the M56. 59

Dear Hall-Mast, ~ I've got a qllestioll 011 para 31c(2) of AR 735-35 "Supply Procedures for TOE Ullits and NOll -TOE Activities." I believe that paragraph mea1J.S that a IInit's stocks 0/ CEl's (combat essential items) will ftot be below the allowances authorized by the appropriate TM's. However, that doesn't limit a unit to TM allowances. That is, stocks of CEl's can be above the TM authorization, if use and demand records justify the increase. Others i,1 this command say that a utlit can't stock eEl's above o r below TM allowances, regardless 0/ me or demand. If' ell, Sarge? WO G. D. M. Dear Mister G. D. M. , You're right. A close reading of paragraphs 30 and 31c should clear the fog. For example: Para30b(2) says: " ... the primary purpose of the recordof-demand card is to enable the organization to adjust quantities of repair parts authorized based upon actual demand experience ... "

In para 31c, under"exceptions",units are required to relain (that is, not to reduce) eEl's per quantities set by TM's. But the AR doesn't hog-tie you on increasing quantities of combat essential items (or any other items, for that maner) when you're properly backedup by usage and demand records. So ... unless your local supply SOP says otherwise, you read the AR right. 60

Hall-1I1Mt

So you've gOt a LeTourneau Super C Tournadozer with no lube fitting on the motor brake bearing? Just count yourself lucky. That's just one less lube point to hit when you're servicing the rig. Some early model Tournadozers If you've got the motor with a bearwere equipped with life seal bearings ing that needs to be lubed, you'll find (or oil impregnated bushings) so no a fitting on it. On this you follow the lube is required. The origirtal LO and word in the latest LO and lube lightly TM 5·3300·[ (Nov 54) tell you abOut every 50 hours of operation. this. (See pages 52 and 55 of the TM.) Replacement electric motors, now in But this point is not mentioned in stock under FSN 6105-371 -3674, have LO 5·3300 (12 Aug 60). a lube fitting.

OPEN.AND·SHUT CHECK

:...lI....==-~_-'"--

_ _ -"-'

The engine shutter on most of your generator sets is controlled by ather· mostat-when the shutter's free to move. Trouble's brewing, tho, if th~ shutter binds, and the manual control handle can clue you when this happens. Give the handle a smooth open.andshut check now and then to make sure the thermostat can pur the shutter into action when the engine temperature goes up or down.

61

I

,' GIfJW /

-- foR

,/

YoURI.OAP

When your load's gonoa hang or extend past the tailgate, better arm yourself with the portable light flasher (FSN 6220·796·2657, Ord part num· ber 8387795). You' ll need the safety device so's you can be safely tailed. The battery powered light works as a continuous light or as a flasher, and its adjustable clamp and magnetic base will let you attach it to all kinds and shapes of overhanging loads. It'll also work as a warning light if you break down, or halt in the dark. TB 9·2300·260·\0 (4 Apr 63) says

Dear Sergeant J. U. 1., So you want to look at things through rose-colored glass? So to speak. Well, fit this into your flashlight and shine it: Filter, Light: Signal type M439; infrared, approx. 1.7" dia; FSN 5850·408·3040. You'll find 'er listed in SM 11·1·5850 (2 Feb 59). 62

t

HoJ{-1I/DA .

We've solved the hopper cover problem on our M3A3 deron. Maybe you've heard of cases wher~ the hopper cover has dropped down into the decon tank and played havoc with the agitator paddles. We drilled a hole in the cover and one in the corner of the hopper. We then attached a 12-in chain to the cover and the hopper. Now if the cover drops it doesn't damage the paddles. Cml Service Platoon Demonstration Company US Army Chemical Corps School Support BaHalion Fort McClellan, Ala.

I (Ed Note-It's also a good idea to check the imide of the ta'lk before 'JOII eugage the power takeoff to make SIIre there are no tools, pipe, or other objects inside which would also damage the agitator paddles.) 63

Or, if you need engine electrical adapterser, FSN 4910.348_7600 r~st

~a;~:/::)hOJd of SM 9-4-49i~~~~ 64

~ ;eodd'~ BRIEFS

LIKE FALLING OFF A LOG

NO SUCH ANIMAL

That's how easy it is to get as many Don't let Chonge 3 (19 Ju163) to TM 9· copies of PS that your outfit needs . . . , 440-250-12 / 1 get you N ike-Hercules a nd get 'em fast via " pin-point" distri- people in a stew. The table following bution . All it takes is DA Form 12· 4 para 3 on page ii lists MWO 9-1440showing your outfit's needs routed thru 250-30 / 22 two times. Instead of going channels to: bats trying to find the MWO's, make a Adjutant General Publications (enter note of th is: The modifications should 2800 Eastern Blvd. reod MWO 9·1400·250·30 / 22. The MWO's listed in the change just don't Middle River exist. Baltimore, Md. 21220

THINK TWICE Before using the Lubrication Chart (or Order) that's printed in your equipment's TM ... think twice. Remember, that chart (or order) is as old as the TM and in many cases doesn't reflect the latest lubrication instructions. Always go by

HOLD THE BRUSH! In cleaning your M 17 field protective

mask be sure to keep any kind of brush (or sharp object) away from the voicemitter. The brush bristles can land in the holes in the protective cover and puncth e LO that's published as a separate ture the diaphragm. If the diaphragm is publication; and go by the one that's punctured your mask' s no longer safe. dated the latest. You'll find the up-fo- WII leak. Replacing the voicemitter is a date LO listed in the latest DA Pamphlet job for support. 310·4.

ICED-UP BIRD

Want to get rid of ice on your bird? the fluid , Mll-D-19418, listed in the Bird O K, then latch on to the deicing. defrost· Dog (0·1 ) TM 55·151 0·202-20P (3 May

;ng flu;d coiled for;n TB AVN 23·13 (14 63 ), under FSN 6850·577·4752. Other Dec 61 ), II Anti.lcing, Deicing , and De· new ·20P manuals expect to pick it up fros ting of Parked Aircraft." You'll find as th e y come along .

tug14

IIJ)\lJ'

Would You Stake Your LifeAon the Condition of Your Equipment?