PS Magazine Issue 88 1960 Series [88 ed.]

Citation preview

P5 Magazine Ra~i ~a n

A~senal

Metuchen, New

Je~se y

lIere I s a br i cf message I would I ike co pass along t o the mil i tary and civillan p"rsonnel o f all components of our One Anny . "A good un it IOOVCS, shoots , cOlIlIlunicatcs , an d maintains i tself well. These are four basic fundamentals. Maintenance is listed last, no t because i t is less imporcant, rather it is good maintenanc e th a t enables accomplishment of the o t her three. In peacetime, proper maintenance is of utmost impor tance, in c ombat it becomes a matter of li fe or dea t h. "At fundamentals upon ~, t o equipmen t of before.

no time i n the h is tory of our coun try have th ese been more manifest than today. The demands plac ed properly maintain t he highly complex and costly our mod ern Army, are fa r gr eater coday than ever

"This is why I ask that each o f yo u, as a member of our One Anny, study and understand th e maintenance needs of your e qu ipment ; and discharge your individual r e sponsib ilities , whether they be corronand, supervisory, or persona l , in suppor t of a sound and con tinuous preventive main tenance pro g ram. "In the words of P5 Magazine, equipment •.••. take care of it. '"

' ,Ie have the world's best

Sincerely,

~c.~ BRUCE C. CLARKE General , USA Conmanding

Issue

1960 Seri es

Publisbed by tbe Department .f lb. Army fur lb. Information of organizational maintenance and SIPply personnel. Distribution is made through normal publication channels. Within limits of availability, older issues may be obtained direct from PS Magazine, Raritan Arsenal, Metuchen, New Jersey.

The Editor PStiagazine Raritan A ~ senal Metuchen, New Jersey

IN THIS ISSUE Here is a brief message I would li ke to pass along to the military and civilian personnel of all components of our One Army. "A good unit moves, shoots, cOlllllunlcates, and maintains itself W!ll. These a r e four basic fundamentals. Maintenance is listed last, not because it is less important, rather it is good maintenance that enables accomplishment of the other three. In peacetime, proper maintenance is of utmost importance, in combat it becomes a matter of life or death . "At fundamentals upon~, to equipment of before .

no ti_in the history of our country have these been more manifest than today. !'he demands placed properly maintain the highly complex and costly our modern Army, are far greater coday than ever

"This is why I ask that each of you, as S member of Our One Army , study and understand the maintenance needs of your equipment; and discharge your individual responsibilities, whethe r they be command, sup e rvisory, or personal, in support of a sound and continuous preventive maintenance program. "In the words of PS Magazine, equipment •••• . ta ke care of it . '"

'We have the world's best

ARTICLES 2nd Echetonlow·Vottage Circuit Testers: ARundown_ . Truck Ori~ers; Cool Engines Don't Oiesel ............ Truck TemporaryParkini Brakes: For Emergency Only M200AI Generator Trailers: Fix for JackSteps ....... FWO Crane·Carrier Hand Brake: Oon't Set It Too long . lifting With Cranes; Pointers On Do's And Don't's.. G742 & G749 Brake Master Cylinders: No Switch... Snatch Blocks: How To Get 'Emfor 2'h·& s-Ton Trucks Towing Fagoel And Brill Busses; How It's Done ..... _. j DisasSembling PRC.S, 9, 10, Watch The Battery Cable. PRC·6 Battery Retalller: ANew fSN ................ PRCS,9, 10 Oiat lock: Check It To Stop Drifting .... CY·1277 Case: Nix On Scrubbing ..... , ............. Vehicle·Mounted Radios: No Antenna Insulator Cracks. M1937 Field Ranges: Removing Stains And Dirt .......

~c . ~ BRUCE C. CLARKE

General, USA Cotmtanding

44

47 47 48

f~1~~~a1~~~~t:(3:4T& 3~~)~ ;~~nSlo~eo;~o iis'e;Em ~~ FIYlllg: When Doing It, Wear Your Gloves ............ 53 Aluminum Alloys: NewJO Numbering System ......... 57

I fh:v;~!~~~ ~~~::t~dCri~~ko'fE~e~~u~i:~i:n~E.~: : :: DarkeningRifleSigh ts:Use Toy locomoti~ePai nt .....

M48 Gun Shield Covers: How Not To lose 'Em... Sincerely,

2 14 16 21 23 24 37 39 41 42 44

~

62 . .. 64

DEPARTMENTS Connie Rodd ....... . .............. , .......... 18 Joe's Oope:The Echelons Of Maintenance ......... 29 QUestion And Answer . . ..... ,. . .. 37 JContributions ....... .•... . ....... , ......... 62 ConnieRodd'sBriefs... . . ..... lnsideBackCover

PS wants your ideas and contributions, and is glad

I~~e a::;efn ~:~fid~UneC~~oJ~~t ::~ee~o~nd addresses S.,t .114-Ma4I, PSM~,

R...n-II","""" M.t..ck-, h ... /"" DISTRIBtlTlD": I. ICClr!laqct wtt. "qail"l lIenl$ $ubmlt1. d tn Dl ftrm 12-4.

1960

Published by the Department 'f the Army for the t information of orlanizational maintenance and supply personnel. Distribution is made through normal , publication channels. Within limits of availability, older issues may be obtained direct from PS Maga· zine, Raritan Arsenal, Metuchen, New Jersey.

IN THIS ISSUE 2 14'

16 21 '23 tilting With Cranes: Pointers On \)(}'s And \)(}n't's .... 24 IG742 & G749 Brake Master Cylinders: No Switch. . . 37 Snatch Btocks: How To Get 'Em for2¥:· &5·Ton Trucks 39 Towing Fagoel And Brill Busses: How It's Done . ..... . 41 Disassembling PRe 8, 9, 10: Watch The Battery Cable. 42 PRe·6 Battery Retainer~ ANew f$N . ", ...... '" .... 44 PRe 8, 9,10 Dial lock: Check It To Stop Drifting . 44 CH277 Case: Nix On Scrubbing{~..... ,.;.~ . Cra~ks: 1~

W:1~~~~~sRe~~gJ~ RT~m:t~;~ ;~~i~~~f;~: :: ':: .: ~

!

Use 'Em 52 ,, 53

!

;E'o;: ..

~

The Scoop: A Selected list Of New Publications. . . " 61 \ Darkening Rifle Sights: Use Toy locomotive Paint., . 62 f~ Gun Shield Covers: How Not To lose 'Em ... ... , 64

!t.n,;. RoO'

,

O~AR~EN~S "

,.. ".'" 18 1

g)o$!s Dope: The Echelons Of Maintooance:,',... ,. ,. 29 !Q~uest.ion ~nd Answer. ,.. . . '· .• ;f .... 3] ntnbutlOns ......... . .. • ,/.". 62 Connie Rodd's Briefs ....•. , ...• ,".'" . . InsIde Back Cover ,O

f

PS wants your ideas and contributions. and is glad Ito answer your questions. Names and addresses '{. are kept in confidence. Just write to:

I:

s,t .114M"", PSM~,

R..n- 11...-1, M.t..d-fvehicle

F7 to F1312l . . ......... . 3.. .. .. .. ... .. 0..... ..... 1.. .. ... .. . 4 (upala 'quipped with fo .. M17 periscopes, no vision blocks {vehicle F1313 to F29411 ......... 3... .. .. ...... 4.. .. ...... 7.. ..... . . . 9 V.hid. equipped with M13cupola ............ . 3. ......... ... 0...... .... 1.... .. ... . 4

20

Those steps on the leveling jacks (and step) on your M200Al generator trailers causin' you trouble? Especially the trailers purchased under contract No. DA-23-072-1023 (Spencer Stafford)? Seems that with generators mounted in 'em, the added weight causes the rear spring shackles to swing backwards. Now, when you wanta raise or lower the . jacks, the steps'll hit the shackles and it's just no go. There's a way to get those jacks to swing up and down real easy. Get your CO's okay to let you do a little cutting on that step. Since he has command responsibility for these trailers, he can give you permjssion to;

The angle to take when making the cut can best be judged by you-this may vary slightly on each trailer. Might be a good. idea to have the generator on the trailer so you can't go wrong. Now, the steps should move up and down as easy as the 01' farm pump handle. 21

Got troubles installing a track or removing the link pins on these vehicles?

MI9 AP( IG280) M84 Sf mortor

M44 SPH series IG279)

IG2~0)

M41 Light tonk series IG2S1l

M42 Twin 40's series IG253)

M7 I AIV IG26O)

MI2 SPH series IG258)

M8 (orgo trrrdor series IG252)

Could be that you've got track fixture, FSN 5120-605-3926. This jack isn't large enough to catch three track pins, which allows free movement of one pin to make it easy to aline the holes for the link pin.

If this is your situation, make sure you turn in your track jack for FIXTURE, track connecting, assy, FSN 5120-708-3799. This track jack'll catch four shoes as shown in FIG 209 of TM 9-2300-203-12 and let the track pin slip in much easier.

22

A quick shake. That's w hat it tak es to make sure that the emergency brakeon your F\V D cranecarrier has been released from the drum. Sometimes, when the brake is left on between periods of operation-such as overnig ht-the band' l1 freeze to th e drum, especia lly.if the brake's hot w hen yo u Stop.

WITH HAND BRAKE REUAS£O, WBAND BlAKE LEVER IS STUBBORN TO OPERATI BY HAND, TAP GENTlY WITH WOOD IlOc!(

If you start off with the brake locked, you'll get plenty of drag-and not the kind t hat' ll do you any good. Stop your rig on level ground, and double-check to see that you've released the hand brake lever. Then, climb down and operate the brake band lever by hand. If ie's stubborn, tap it gently with a wood block. If this doesn't work, call a mechanic. But, make sure the band's free before you go on your way. ]f you wea r the band down , you can score and cut th e drum before you know it. 23

It's great to have big, bulging muscles, but they don't do you a lot of good if you don't know how to use 'em. Mauer of fact, you can bust a coupla gaskets if you try to strong-arm a weight that's out of your class. Same thing goes with your crane-crawler or truck-mounted. It's got the muscles to do juSt about every job that'll come your way. But, you gotta know how to go about it or both you and your rig will be ' the deadlined list. All it takes for a smooth operation is some good old common sense when you make your lifts.

It's great to have big, bulging muscles, but they don't do you a lot of good if you don't know how to use 'em. Matter of fact, you can bust a (oupla gaskets if you try to strong-arm a weight that's out of your class. Same thing goes w ith your crane-crawler or truck-mounted. It 's gOt the muscles to do just about every job that'll come you r way. But, you gotta know how to go about it or both you and your rig will be the deadlined list. All it takes for a smooth operation is some good old common sense when you make your lifts.

First off, you want to be sure that your rig has the muscles to do the job. Don't try to tackle a job that's going to be a blockbuster. A guy can be a top lightweight, but he doesn't mess with heavyweights unless he's ready to collect on his hospitalization-or insurance. If you've one of the late model cranes that have a rated load capacity ID plate mounted inside the operator's cab, it' ll clue you to the operating radius, boom lengths and lifting capacity in pounds. A boom angle indicator is also usua lly installed to give you the capaci ty of your rig for any position of the crane. Some of your older cranes are eq uipped with a radius indicator near the foot of the boom. If you use this along with cha rts in your rig's TM, you can find the safe load capacity.

1.

Ch&k your boom hoist cable and hoist line 50 you know you hove the right size lines on your rig. You'll use a two ar three-part line-depending on the weight of the load to be lifted and the hoist speedJ!.U want.

2. Make sure thot the crane is on firm, solid ground. You need good footing When you stott Misting a heavy load-eke you're liable ., to go !~U over fin-cups.

3. Inspect the slings and fastenings. See that they're secure and in good condition.

4.

Double-