PS Magazine Issue 193 1968 Series [193 ed.]

Table of contents :
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Citation preview

HOLD ONE-

B.FORE YOU CO! You've seen guys who think they're hot·rodders. They flip the switch, slam the gas to the floor and try to hit 60 in 6 flat. Nuh-uh!The),'re not hot-rodders. They're not even drivers. They ought to get jobs in the local junk yard tearing up cars for scrap, for that's exactly what they're doing. When you see a soldier treating a U.S. vehicle like that, better halt him and tell him to watch a few things, like -

Published by Ih ~ Oepm1n~nl of lh ~ Army for Ihe InformallOn of Orianllatmna l ma nt t nanc ~ and supply pt rsonnel 0,\ ,$ m~de Ihroui!h norlll ~ 1 publr

HOLD ONE-

IrrbullDn

BEFORE YOU CO! You've seen guys who think they're hot-rodders. They flip the switch, slam the gas to the floor and try to hit 60 in 6 flat. Nuh-uh!They're not hot-rodders. They.' re not even drivers. They ought to get jobs in the local junk yard tearing up cars for scrap, for that's exactly what they're doing. When you see a soldier treating a U .S. vehicle like that, better halt him and tell him to watch a few things, like -

IN TH IS ISSUE GROUND MOBILITY 2·21 AN1GSS·14 2·15 Searchlight 20 16 Soo.Ga!fuelDrum 20 11 18,19 19

PolPump Troublesllooting Fit

21

21

...lMlAlw.... Fuel tank full? No gunning the engine. Warm up at idle before moving out. Move out in the lowest gear steady and easy. Keep on eye out for any drastic changes in dashboard gage readings. Listen for any unusual noises. Keep RPM in operating range Ino lugging, no over-revving). No jock· rabbit starts and stops.

GENERAL & SUPPLY tkwPubllcations

Lubri¢&lJ~

68-11

59 OAform331Il 67 EquijlWamlllties: 1&, 17, ~~:~~::;: ~; ~'

eH·54Tai! Rotor TAERSforll'lS

71

7t

51 57

Cabl,

Ttl1s!Omelers

COMMUNICATlON5ELECTRONICS 60·66 AN/ GRc;.I06 SB.a6}PSwifeh· lUning He.ads 62 board

Aft / Mf'(H4 Radar 13 ANITIO·20 PASet 13 TA43)PT. lA·312/PT 63

AN/ G!lCSOM AH /f'f!C.14

SN-394('iUG

U$t " IIIIIU lar priRtina .t tills pjdllca. liell hs lieu app",n d IJy Kealhlnrttrs,

OepartMe nt II th, AI1IIY, 16ftll ru ry 196•.

DtsTRI8UTlON: In accordance wItb re, quirements submitted on DA form 124.

5.

-'II"""'""'"

Pub l ll~ ~ d by th e Oepartfuent of Ih e Army

!urthe Information ofol,anllatlonal ma,nt enance and ~uppl, pelsonnel 0,1 Inhullon IS made Ihrou h no rmal

ub i

IN THIS ISSUE GROUND MOBILITY

2-21

AH / G5S-14 Sealchliallt 500.GaIFuelDrum Pol Pump Trnublesllooting fix

2·15 16

17 18,1 9 II

FIREPOWER

20 ZO

21 21

22-27

BtackeningSIgI!ts 22·23 MI6A1TrBeerfiring 23 Nike-Herculu 24, 25, 2&, 27

down the engine with high idle for a few minutes before you cut her off. Fill up lube, fuel, coolant. (heck 'er over for anything loose or damaged. (lean 'er up, and she's ready for on overnight.

(001

starting on Page 37.

~,d!.~'"

Lubrication ....11 DAforrnl318 11 87 Equip Warranties 79 18, 11, '1, 11, 24, 33, 38, 51, 82, 63, 15,18

moving out.

Move out in the lowest gearsteady and easy. Keep on eye out for any drostic changes in dashboard gage readings. listen for ony unusuol noises. Keep RPM in operating ronge (no lugging, no over-revving). No jock-rabbit storts and stops.

~'--';j""~'

GENERAL & SUPPLV

No gunning the engine. Worm up at idle before

AIR MOBILITY 45-58 BYOIUTE

!U·2IAl

CH·5.(TaiIRator

4~S4. 55

AH-IGOogHoose OH-6A

TAERSForms

""', Ten$lOlMters

56 51

51 57 58

COMMUNICATIONS· ELECTRONICS

60·66

AntennaTips 80-81, 12

AN / GRC-I06

Silicon! Gruse

5B.a6/PSwltCh-

82

~~i~~r:adar ~ AN~~~5OM

AN{TI0-20 PASet n TA-43 / PT,TA·312!PT 63

AN / PRC-14 SNJ94M / G

Ikteff Dndt ler pf'ilttq:.ltIIls pldll!ca. lioft has beu approvt d by HtJdqfarttrs,

Depmmnl al the Army, 26 f1brury t96'. DISTRIBUTION: In accordanu with teo

quirements submitled

Of!

OA Form 12.... ,.......-'--~c.-,

.JIolJ· M ..1, P& M .......,

&",.

qOlli~~, ~'1.

1101:1.1

,

B~ ' .

.

BE YOUR OWN INSPECTOR ON ...

WINDSHIELD - Cracked enough to obstruct driyer's Yision, craz~d. discolored; weatherstripping cracked, torn, missing; tie-down catch or stowage strap unsound, missing; glass broken; hood bumper~ missing.

HEADLIGHTS, BLACKOUT MARKERS - Painted oyer, dirty, broken; marker twisted out of line; blackout support bracket or shield loose, broken; lenses waterlogged, clouded.

The best detective around to find such trouble, before it grows, is the guy behind the wheel-you. W hen you find something wrong during your eyeball exam, get it fixed - fast if it 's anything listed here in bold type. But, puh.leeze, leave it to a regular mechanic unless you're authorized to mess with it. Just be sure to jOt it down on a DA Form 2404 for your unit mechanic to cackle. You don't have co do all this in one shot. Do it bit-by-bit. In a short time you can inspect the whole vehicle.

Al(WINDSHIELD - Cracked enough to obstruct driver's vision, craz~d, discolored; weatherstripping cracked, torn, missing; tie-down catch or stowage strap unsound, missing; glass broken; hood bumpers missing.

HEADLIGHTS, BLACKOUT MARKERS - Painted over, dirty, broken; marker twisted out of line; blackout support bracket or shield loose, broken ; lenses waterlogged, clouded.

This set of wheels gUS JOts of use. Wear and road licks can make trouble. The best detective around to find such trouble, before it grows, is the guy be·

hind the wheel- you. W hen you find something wrong during your eyeball exam, get it fixed - fast if it's anything listed here in bold type.

But, puh-Ieeze, leave it to a regular mechanic unless you're authorized to mess with it. Just be sure to jot it down on a DA Form 2404 for your unic me-

HRES & WHEELS - Lug nuts loose, missing: studs bent, stripped; hole edges cut, cracked; air-drop eyes or Jam nuts loose, missing; rims dented, bent; lire bead not snug on rim; valve caps missing; pressure wrong (unless local SOP says otherwise, in mud sand or snow it's 12 Ibs front and Ib~ rear; on pavement it's 20 Ibs front and 25 Ibs rear; on cross-country 18 Ibs front and 22 Ibs rear); tires mismatched, cut or worn to fabric, unevenly worn.

18

FUEL TANK - Filler cap rusted, missIng: gasket broken, missing; vent valve in wrong position (if it's at OPEN but you feel pressure loosening the cap, the vent's clogged or sticking or tank : to-carburetor is clogged); tank leakIng; strainer clogged, holed, missing; fuel level too high (2 inches below tank top is top); foreign objects under seat endangering tank or lines.

TIRES & WHEELS - Lug nuts loose, missing; studs bent, stripped; hole edges cut, cracked; air-drop eyes or jam nuts loose, missing; rims dented, bent; tire bead not snug on rim; valve caps missing; pressure wrong (unless local SOP says otherwise, in mud, sand, or snow it's 12 Ibs front and 18 Ibs rear; on pavement it's 20 Ibs front and 25 Ibs rear; on cross-country 18 Ibs front and 22 Ibs rear); tires mismatched, cut or worn to fabric, unevenly worn.

FUEL TANK - Filler cap rusted, missing; gasket broken, missing; vent valve in wrong position (if it's at OPEN but you feel pressure loosening the cap, the vent's clogged or sticking or tank -to-carburetor is clogged); tank leaking; strainer clogged, holed, missing; fuel level too high (2 inches below tank top is top); foreign objects under seat endangering tank or lines.

JUST 6ECAUSE yOU DOA GOOD AFTER-OPERATIONS SERVICE ... DOESN'T MEAN YOU CAN SKIP THE BEFORE-oPERATION.s SERVICE.

FUEL CAN - Rusted, leaking, cap missing; chain broken, or missing; gasket missing or cut; webbing or Q·ring un· serviceable.

JUST BECAUSE yOU DOA GOOD AFTER- OPERATIONS SERVICE .•• DOESN'T MEAN YOU CAN SKIP THE SE'FORE'-oPERATIONs SERVICE.

CANVAS, WINDOWS - Torn, dirty; retaining straps frayed, buckles missing; seams open; windows fogged enough to hamper vision.

FUEL CAN - Rusted, leaking, cap missing; chain broken, or missing; gasket missing or cut; webbing or O-ring unserviceable.

TOOL BOX - Unauthorized tools or parts; tools broken, missing;(check -10 TM OEM ); box dirty, wet; cover bent, rusty, crushed, missing_

BATTERIES - Cracked, leaking, dirty; clamps or posts loose, corroded, mangled; electrolyte level low (should be Va inch above plates); low charge (check electrolyte specific gravity with hydrometer - should be 1.200-1.225 in tropics, 1.285 elsewhere); filler caps loose, broken, missing, vents clogged (clean with wire); holddowns too tight, loose, corroded_

TOOL BOX - Unauthorized tools or parts; tools broken, missing; (check -10 TM OEM); box dirty, wet; cover bent, rusty, crushed, missing_

WINDSHIELD WIPERS- Hose cracked, loose, leaking; not enough slack to lower wind· shield without pulling loose; manual operating handle bent, scraping glass Dr frame, loose, knob missing.

BAITERIES - Cracked, leaking, dirty; clamps Dr posts 10Dse, corrDded, mangled; electrDlyte level IDw (should be % inch above plates); IDw charge (check electrolyte specific gravity with hydrometer - should be l.200-l.225 in tropics, l.285 elsewhere); filler caps loose, brDken, missing, vents clDgged (clean with wire); holddowns too tight, IDOse, corroded. DATA PLATES-Painted Dver, loose, missing. FLOOR- Rusted, drains clogged. (More on INSIDE items coming up in WORKING CHECK)

WINDSHIELD WIPERS- Hose cracked, loose, leaking; not enough slack to lower wind· shield without pulling loose; manual operating handle bent, scraping glass or frame, loose, knob missing.

I

GAGES, INDICATORs-Glass broken, painted over, clouded; unreadable; pointer missing. DATA PLATES-Painted over, loose, missing. FLOOR- Rusted, drains clogged. (More on INSIDE items coming up in WORKING CHECK)

SAFETY CAKH - Won't hold hood up securely, cracked, not alined right, rusty. WATER TEMPERATURE SENDING UNIT - Connections loose.

Oil PRESSURE SAFETY SWITCH - Corroded, nections loose. ' Oil DIP STICK - Bent, ' O-ring cut or missing, won't seat right, missing; oil level low, below ADD.

10

SAFETY CATCH - Won't hold hood up securely, cracked, not ali ned right, rusty.

GENERATOR - Out of line, loose, pulley cracked or cutting belt, connector loose.

WATER TEMPERATURE SENDING UNIT - Connec· tions loose.

LINKAGE- Choke, throttle, or accelerator couplings bent, badly worn, binding; pins or retainers worn, missing. OIL FILLER CAP - Gasket loose , missing; chain broken, missing (hissing sound here means your crankcase venting is bad).

EXHAUST MANIFOLD Bolts loose, lock tangs broken, missing; outlet gas· ket to pipe flange loose, missing. 10

11

GENERATOR - Out of line, loose, pulley cracked or cutting belt, connector loose. LINKAGE-Choke, throttle, or accelerator couplings bent, badly worn, binding; pins or retainers worn, missing. OIL FILLER CAP - Gasket loose, missing; chain broken, missing (hissing sound here means your crankcase venting is bad).

EXHAUST MANIFOLO Bolts loose, lock ta~gs broken, missing; outlet gas· ket to pipe flange loose, missing.

"

UNDERFRAME- Bottom plates or crossmembers gashed, welds pulled loose; plate ends broken to admit mud underneath. DRIVE SHAFTS, U-JDINTS - Rattling, unlubed; spline ends toward wheels (you want the "short end" toward differential, "long end" to wheel). REAR DIFFERENTIAL - Flange-guard washers or screws missing (older models were issued without them); breather plugged, missing; suspension bolts loose, battered; out of alinement (may indicate suspension arms or braces are bent); leaking lube. SHOCKS & SPRINGS - Same as front end. On either set, a sag to one wheel indicates a shock absorber, coil spring, or both are kaput. SERVICE BRAKE LINES-leaking, chafing, crushed; tees and connectors wet at joints; clips dangling, missing.

PARKING BRAKE -loose on support, out of alinement; linkage bent, loose; oil drip fouling brake band; return spring slack, not engaged (clean off guck to look for signs of excess wear).

EXHAUST SYSTEM- Rust or burn holes in pipe; suspension brackets broken, missing; muffler to exhaust pipe gasket leaky, missing (if brackets are all present but chafe marks or holes show, suspect engine mount damage); muffler crushed, rusted out.

UNDERFRAME- Bottom plates or crossmembers gashed, welds pulled loose; plate ends broken to admit mud underneath. DRIVE SHAFTS, U-JOINTS - Rattling, unlubed; spline ends toward wheels (you want the "short end" toward differential, "long end" to wheel). REAR DIFFERENTIAL - Flange-guard washers or screws missing (older models were issued without them); breather plugged, misSing; suspension bolts loose, battered; out of alinement (may indicate suspension arms or braces are bent); leaking lube. SHOCKS & SPRINGS - Same as front end. On either set, a sag to one wheel indicates a shock absorber, coil spring, or both are kaput. SERVICE BRAKE liNES-leaking, chafing, crushed; tees and connectors wet at joints; clips dangling, missing.

PARKING BRAKE -loose on support, out of alinement; linkage bent, loose; oil drip fouling brake band; return spring slack, not engaged (clean off guck to look for signs of excess wear).

FRONT SUSPENSION - Bolts loose on lower arm assembly; shims missing; shaft bolts loose; arms or crossmembers bent, cracked_ FRONT UNIVERSALS-{Shaft ~n~ wheel drive) Nuts or bolts loose, mlssmg; excessive wear (a rattling sound tells you), poorly lubed.

FRONT SUSPENSION - Bolts loose on lower arm assembly; shims missing; shaft bolts loose; arms or crossmembers bent, cracked. STEERING - Pitman or idler arms or shafts loose; nuts or cotter pins miss· ing; tie·rod spindle-arm assembl~ bent, loose; bushings worn; grease fittings broken, missing; clamps or sleeves bent, loose, missing.

FRONT UNIVERSALs-{Shaft and wheel drivel Nuts or bolts loose, missing; ex· cessive wear (a rattling sound tells youl, poorly lubed.

DIFFERENTIAL- Dripping lube, breather plugged or missing.

DIFFERENTIAL FLANGE GUARD- Bent; bolts, washers, screws loose, missing.

RS WIPER MOTO ter. weak, chat

rk, - Won't wo

issing; - Knob m TRANSFER ing, torn; hard to iss m won't ot bo standstill, operate at disengage without or ge when enga or stopping clutching oving forward. m is vehicle atters, Grabs, ch CLUTCH - g free play (should on wr ; slips IX inch). be IX to

[tJ

OKE CONT, L& THROTTLE r.-f, CHNT L-s~O L !} CO ROmissing. l~klnf' handselest lOose, , on t stay

torn , AKE- Boot PARKING BRn't hold on slope ; missin g; wo ge and release won' t enga smoothly. nuts ITCH -Lock IGNITION SWose, missing; hanlo l se, ne loo pa to ing screw dle retain itch broken . sw g, sin mis Broken, LIGHTS - ' WARNING er. ov d te pain work , RS- Won't WIPER MOTOter. at ch weak ,

. BATTERY GENERATOR INDI it R_ TO ng CA ls to SlYi r le ite~e:~i r.-f, ;romenfaas SWitch .e lowrnOred low on re tU IS L !} d In idle. runnin an d' while usual spee ; needle doesn ,f stay in 6ree

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[tJ

L!J

[tJ

r.I-.

L!J

issi ng ; - Kn ob m TRANSFER g, torn; hard to boot missin standstill, won' t operate at disengage with out engage or or stopping when clu tching oving forw ard. vehicle is m atters, Grabs, ch CLUTCH - g free play (s hould on wr ; ps sli IX In ch). be IX to

.,

~~ c.

m

rtJ

[tJ

rb

m Loose, PEDAL t STARTER oken, won' br ; rd ha works . rk wo

OIL PRESSU RE GAGE _ Fails to read be .15 and 30 ry PSI In ordina lYea to 40 PSI at • ACC£LERA R PEDAL _ TO Binds, stick In any PDsition, e~. IDOse, brok @l

_ _ --'"

~

r./-.,

d or STEERING cr~cked So ands to re co u thro h dflre; steering ~u~nb IDOse, da~J/ ~~ lo nt bracket u e cut; fros. en d · .Dr bounce n' or H steers . se t k.loo stuck, IYOn'

ALS TURN SIGN (If present). Won 't 11'0 Ip out ofmPo Sltlon, amaged O~nt IDOse aI/ bUlb; in 1 gin: lights Stll/ with en running).

Jr-

T HEADLIGH ~ BLACKOUT M

l! J LiGHTS br- oken; n~on ,tra~kets,

h~gt:~

d. When jOlte

light

r/,

L!J

CHOKE CONTROL & THROTTLE CONTROL-Sticking, handles loose, missing; won't stay set.

HEADLIGHT DIMMER SWITCH - Loose, stuck, broken (check dash panel indicator to be sure high beam circuit works) ....--=:::::,-;:::: "=====---

BAnERY· GENERATOR INDI· CATOR - Needle failsto swing

rei, from far left to Yellow or low

L!J

r/-,

\..!J

Green as switch is turned on and in idle; while running usual speeds, needle doesn't stay in Green.

OIL PRESSURE GAGE - Fails to read between 15 and 30 PSI when idling in ordinary weather and close to 40 PSI at normal speeds.

,/, ACCELERATOR PEDAL Binds, sticks in any positio n, loose, broken. @ ~Q>;) ~ ' STEERING- Wheel gouged or cracked so it hurts hands to drive; core rusted through r/-, steering column loose, dash; bracket loose, tube cut; front end shimmies or bounces; steers hard or . loose. Horn stuck, won't work.

\..!J

\..!J

TURN SIGNALS - (If present) Won't work, slip out of

posi· r/-, tion, handle damaged, mount

L!J

r./-,

loose (check all bulbs in all lights at standstill with engine running).

HEADLIGHTS, BLACKOUT LIGHTS - Mounts, bracke ts broken ; won't light, fli cker when jolted.

L!J loose,

m

l.!J

SPEEDOMETER·ODOMETER Sticking, works mileage does jumps, broken .

-~---

~ll'offi))JijE'.!~

LIGHT SWITCHES - Handles broken , stickin g; retaining screws missing ; main switch movab le from lock position (there' re 2 kinds of switch: yours might give you Stop Light and Service Drive with· out using UNLOCK). ENGINE TEMPERATURE GAGE "- Fails to read 160' to 180' warmed up, around 200' in usual operating conditions. SERVICE BRAKES-Spongy, wrong ad· justment (check free travel by hand at standstill: Y. inch, plus or minus K, inch, is right, and should clear floor by 2 inches). Vehicle should stop in straigh t line in 100 feet or less on dry road (use steady pressure, not panic stop) at highest permissible road speed. If vehicle swerves, brakes may need adjustment.

Ga3a-SERIES 1/ 4-TON TRUCK ...

WARN ING DECA L

---.....---.

Would you believe some guys forget - CAU TI ONto disconnect their vehicle's battery cables w hen they hook up a baucry BOOSTER OR BATIERY NEG(-) CABLE charger for in·vchic1e charging? MUST GO TO NEG(·) POSIt) TO POSIt) DISCONNECT BATTERY And weuJ.d you believe that some CABLES BEFORE USING CHARGER guys actually connect the charger's neg· a tive (-) cable to the battery's positive (+) post-and the charger's positive the battery box cover. Ask for Decal, cable to the battery's negative post? FSN 7690-912-3504, listed in SC 7660/ .,;.... Well, believe it or noc, they do. 90-IL (Jun 67). After installing, give it So a few words of warning may save a a coat of clear varnish so it won't go to lot of batteries in your outfit's M151Al pot. 1/4.tonners orothet G838-scries tcucks. And then remember -always, negGet a warning decal for everyone of ative-to-neg ative and positive-to-posithose trucks and stick it on the inside of dye.

0"s:J~IN G CHER RY JUICE MIXU P

Cherry juice razzle-dazzl e is fine at the gedunk stand, but it can be downright dangerous if it's practiced in the maintenanc e shop. Take the recent case of an MISI in a shop for a brake job. The mechanic filled the master cylinder from the 6rst can of cherry juice he came across. Trouble was a-brewing 'cause he picked up a can of petroleum base hydraulic fluid used in automatic transmission s. Sure, it was cherry color and flowed like hydraulic brake fluid. Bur the brake system had to be purged because petroleum base h ydraulic transmission fluid will destroy brake system seals. 'Course you wouldn't reach for the wrong fluid-not as long as you eye the label on the can of cherry juice c-a-r-e-f-u-I-I-y. You want the non-petrole um base brake fluid. 16

I

Dear Half-Mast, TW