PS Magazine Issue 114 1962 Series [114 ed.]

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Citation preview

1962 Series

Issue No. 114

Published by!h. Department 01 the Armyforth.lnforma·

lion 01 orr:anizllional maintenance and supply personnel.

Distribution is made through normal publication channels.

Within limils of availability, older issues may be obtained dl· recl lrom PS Magazine, Raritan Arsenal, Metuchen, New Jersey.

IN THIS ISSUE ARTICLES

Maybe you ' ll look over your gear ninet y-nine times in stead of taking te n , and it won' t do' a bit of good . But that humlredlh time could th e differ ence betwee n just going out. ... or going out and com in g back . .

SPell"

Features Pa ge 11-14 Rocket Mechanic Tool Kit Vehicle Antennas: Treat 'Em Genlly 21 ·24 Communications Equipment Radar Test Set AN / UPM·6A & 68 17 T.195/ GRC.19: Synchronize Tunin g Controls 18 TA· I / PT Telephone 19 Print Straightener Healing Elemenls • 20 M301 Meter RT·66·7·8/ GRC's • • 25 Armament M60 MG: Tool to Remove Extractor Assembly 2·3 M14 Rifle Flash SUppressor 7 M2 .5O·cal MG: HB Buffer Gets No Oil 42 Aircraft Color Cod!n g Parts 53·54 Iroquois (HU· 1): Careful on the Pedestals 55 ·56 Army Aircraft Hardware Kit 57· 58 Sioux (H· 13): Check Boost System Hydraulic Fluid 58 60 Tail Rotor Pitch Change Rod Fogging on Windows & Bubbles 62 Lock·Wirin g Tool , 63 Missile Corporal Propellant Valve Release 10 Littlejohn Rocket Motor 15 Tracked Vehicles 5 M60 Tank: Turret Accessories Box M48A2 Tank: Don't Pop the Hub Seals 40 General New Publications 28 Whith Stale to Use 37 NC·IO Federal Crane . Vacuum Power Cylinder 44 • Power Steering • 45 CF)Br Fire btinguisher 46-47 DEPARTMENTS Connie Rood ' 5 Joe'S Dope 29 Question and Answer 37 Connie Rood's BriefS Inside Back Cover

PS wants your ideas and contributions, and is rlad 10 answer your questions, Names and addressu are kept in tonfidence, Just write to!

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14

"Haste makes waste." "Patience is a virtue." Either onc of those quotes-or bothwould look good tacked some place around the indicator panel in your Corporal guided missile test station.

When you shut down the generator before the voltage drops below the 30 figure, the control voltage is taken out of the controller before the 400-cycle power has fallen off. This sets the controller to running ... and it keeps going till the 400-cycle power dies down. Then when you go to energize the missile ... the controller starts running right off. That means you wastebecause of haste-a coupla seconds before you can reacquire the controller. And seconds can be mighty important hunks of

to make sure you don't shut down the

liS-volt motor generacoc before the 400-cycle voltmeter on the indicator panel reads less than 30 volts.

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Unci I something else comes along, there's one way co get rid of the condensation that builds up in the concainer for your M26 Littlejohn rocket mocor. Take out the drain plug and raise the other end high enough for the stuff to run out. 15

cion drips down into the not have a canister but it does have them wet and ruins them. filter elements instead. Make sure the element pouch flaps When you breathe in , air is drawn are buttoned down and that the nose into the facepiece of your mask through cup is buttoned to the pouch flaps. inlet valves and then passes through the You've gOt two buttons on each side of filters which are in the pouches molded the mask. Before you put your mask back in in the cheeks of the facepiece. Those filters will do their job but the carrier and whenever you inspect you've gOt to keep them dry. No you your mask, take a second to check the don't have to dunk your mask in water chin portion of the nose cup to see that to get them all wet. They'll get wet if it's not tucked in and that the nose cup ' the chin portion of the nose cup is not and flaps are buttoned right. seated the way it ought to be. When th; - bottom of the nose cup is tucked inside or turned under, your perspira-

LET'S COMMUNiCAtE

That's what radar test set AN/uPM-6A or AN/uPM-6B and its calibration chart should be whenever the set goes back to support for repair or modification. Those charts arc good only for the particular set for which they were made. So when you don't send them along with the set, what started Out as only a repair or modification job grows ineo something bigger. Before repair work can get underway, the set must be re-calibrated and anocher chart made up. All this takes time ... time that the set is away from you. So keep 'em together wherever they are ... and wherever they go.

Next time your vehicle is slated for a trip to the paint shop, take time (0 get the commo equipment off ... all of it. If you don't, paine will show up on the connector openings, on dials and insulating gaskets on the radio set itself, and on the ceramic of

wagon, communications. And, whether you take the set off to save it from a spray job or for any other reason, be sure you put it back right. F'rinstance, those mast base gaskets. Each one is supposed to be snug against a ceramic insulator, one above the mounting bracket, and the ocher below it. Double check to be sure they're installed that way. 17

Been having troubles when one or both of the tuning controls on your T-195/ GRC-19 don't work together with the preset frequencies? If so, the trouble could be the result of a loose locking bar or two. Next time it happens to you, try this little routine:

Unlock the locking bar of the band seledor or fine tuning control ldepending on whim bar was loose). Turn the (ontrol or (ontrols (ompletely (ounterdockwise. When you (on't go ony farther, apply slight-repeat, slightpressure. Then tum tf1e (ontrol or (ontrols in the opposite direction. Again put on a little pressure when you reach the end. Tighten the locking bars and your controls should be synchronized with the preset frequencies. But don't get shook when you find you've lost one of your presets. You're bound to lose the one your tuning controls were set at while the locking bars were loose.

Sometimes your shoulder gets tired carrying that telephone set TA-43/PT or TA-312/PT on a long march. So, to give it a rest, you carry it in your hand or tuck it under your arm. Or maybe even hold it by the carrying strap. That's fine. Or maybe you grab it by the canvas loop attached to the slide fastener of the zipper. That's not so fine. That 9Y:z pounds of phone will put a heavy strain on the zipper. Sooner or later something's got to give. The zipper

zipper. The loop is there only to make it easier for you to open or close the case, especially if you're wearing gloves. 18

Usually the right way is the only way-and the easy way-in Well, that's enough philosophy for this time. But few people will argue that slipping the handset cord and binding post connector into the carrying case of your TA-l/PT telephone set can give you fits ..... uniess it's done the right way. 'Cause trying to stuff it in any old way leads to lots of sweat and sometimes leads to dam~ged equipment. So how, then?

That way, it'll be easier to snake the cord down into position without any sweat. That part of the cord left over after the phone is snug in its case can be coiled around the top of the phone-with plenty of room to spare comes time to close the cover. It's a fairly tight fit, but a man who snakes the whole works down into the case slow and easy-like will always make out a good case for himself. 19

Snake eyes! No, that's not a " game of chance" going on inside a comm shelter. It's juSt an operator telling his crew what he found staring at him when he pulled his set Out of its case to do some PM. This is likely to happen when your set - whether it's terminal or relay equipment-stands outside during foul weather. Snakes and rats like to snuggle up to something warm and dry, like your set f'rinstance.

gerous any time ... but more so when they're shook up by a PM-minded operator as he opens his set. And, they can knock communications out if they gnaw or bite through insulation or touch a contact. Knock themselves out, too. To keep these uninvited guests out of your equipment, add rodenticides (fancy name for rat killers) and traps to the list of items you carry into the field. And ... keep your eyes open.

Easily broken. That's the warning out on those asbeStoS covered wires coming from the heating elements of print smtigllterlOrS, PH·146,PH·146A, FM-105(l), 105(2), and FM-105(3). These wires won't last very long unless you follow the TM when it comes time to add water. In short, pour it in. The other method-unplugging the heater cable and carrying the water pan to the nearest sink-weakens the wires. And, watch that water level. If it gets too low , you'll burn Out those wires. To be safe, keep the level between the half and three-quarters mark.

20

'Tis said that the cae's whiskers tell Tabby whether she can fit through a SpOt or not. If juSt the ends of her whiskers (Ouch,

But if those whiskers get bent way, way down, then the shrewd cat figures the fit's too tight ... and looks for another

But the cat's whiskers might be an idea for a driver (0 keep in mind if his truck, tank. APe, or what have you, is totin' communications equipment.

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In some extreme cases, the mast base itself may be damaged if an antenna is depressed almost to ground level. The heavy rubber insulation on the base can be cracked, reducing t.he flexibility of the base, and opei i it s that soon begin to let water in.~ ~~,'~:r Now, no CO expect~driver to steer around low- anging tree limbs when his iron buggy starts clanking into action. Same goes for all the others: a Y-i-ton or %-too truck ... a 2V2-ton truck carrying a commuoiCatiO.:ns L sS~hee.l1.te . . . . or maybe a loaded APe hustlin' up to its discharge POint._~ ~ . When the action is hor,2 oything and everything goes! cy~ And if some antennas have to bend mighty low-that's the way it has to be. But the rest of the time-which is most of the time-a good driver can go a long way toward keeping his antennas flexible One of the skills he can develop follows the old "eat's whiskers" approach. When rolling along on either a good not-so-good road, bear in mind the all elevation of your antenna. And with that in mind, keep an eye up for such things as overhead wires, tree branches, I:B.II.~"?

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bridgesandothers.~~ ·

If they're not too low, your antenna enough can absorb the impact and flex in. stride. to reduce the impact and cut down on But if you're heading for a really low thewhipeffect?~ ~ 22 ~

and securing a vehicle, a

One

your truck or tank

enjoys over the four-footed friend with

driver will 'Yaor (2 around. _

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Be-

the whiskers, of course, is the tie-down

cause if ~iCle

technique. Knowing in advance that a maneuver will take its course through

angle-and is also snuggled close to a wall or side bf a hill-the antenna might

IS

parked at a slight

wooded terrain or under and over more be leaning over enough to scrape than a few bridges, a good driver can

antenna, maybe, but it can sure cut down on its electronic performance. Just jockey the vehicle a bit so the antenna is free to stand up by itself. 23

'"'"~ JUSt ~bbuc $his :. PQint you .,"",,-',:; chart. As it turns out; that " Which is why the red is there. Circ~it Trouble ~ocalization Ch~rt" What it all means, of c~urse, is that just might be overlooked among the the red zone on the METER (M301) of many other charts, drawings, etc., in your RT·66iGRC, RT·67iGRC and TM 11·289. RT·6S/GRC receiver· transmitters It shows up in para 60, page 124, marks the target for the needle when and spells out what the proper readings should be for the various settings for po· checking the filament circuit. And if the needle Stops anywhere sitions 2·11 of your METER SWITCH. And like its name suggests, the chart oucside that red zone, the time has arrived to check for trouble in the localizes the trouble and points a finger circuit. at the item that's probably causing the But how to check! What if your trouble. METER SWITCH (5301) is set at Keeping an eye on the meter and the chart will be all you need to make sure

~ha(s w:herJ;~ y.o u ~nf toJ~~:~ Irl~t.6e red. "::~~

:?~,.?~5~f.:~ealth{i:outpuc, .proper fi;~. ~lJlent -,sondlEonst·"and;~uffi~nt",voltage

supply,.

2S

YOUR M151 Yep, all nine of those letters are important clues to some peculiarity inherent in your MISl, ~-ton, truck. Take PWR (power weight ratio) and you've got a peppy little truck because it's loaded with power on a light-

PWR AND RSS cause of its shoer turning radius, take 'cr easy on those sharp turns ('specially over rough terrain) or you can flip 'cr over.

weight chassis. When you've coupled this PWR up to RSS (responsive steering system) you drivers should be forming some idea of your MIS 1's driving capabilities. Be-

l'

may not realize the speed she's goin' because much of the bumping is abE~"'_""' m,hed (no warning telegraphed) ... try to turn on a dime and can't

"

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Traveling in hilly or mountainous country? OK, at the top of a hill-before you starr down-select a proper gear range (the same gear used to go up the hill) but keep snubbing the service brake enough to keep the speed controlled within the speed limits cited on the caution plate-and in step 8, page 23, of TM 9-2320-218-10 (May 1960). Keeping the limits in step 8 in mind (no matter where you're drivin '), even if you hafta memorize 'em, makes good sense.

26

"II

YOUR M151 Yep, all nine of those letters are important clues to some peculiarity inherent in your MIS! , ~-ton. truck. Take PWR (power weight ratio) and you've gOt a peppy little truck because it's loaded with power on a light-

PWR AND RSS cause of its short turning radius, take 'er easy on those sharp turns especially over rough terrain) or you can flip 'er over.

weight chassis. When you've coupled this PWR up to RSS (responsive steering system) you drivers should be forming some idea of your MISl's driving capabilities. Be-

"'./i'"

Traveling in hilly or mountainous ~ country? OK, at the top of a hill-before

you stan down-select a proper gear range (the same gear used to go up the hill) but keep snubbing the service brake enough to keep the speed cootrolled within the speed limits cited on the caution plate-and in step 8, page 23, of TM 9-2320-218-10 (May 1960)_ Keeping the limits in step 8 in mind (no matter where you're drivin'), even if you hafta memorize 'em, makes good sense. 26

,ers, stumps, etc., strewn here and there ' ... pick your trail right careful-like. If you've straddled one of the objects and misjudged its height, the rap taken by the undercarriage could mean a disabled truck. Keep the eagle eye peeled for communication wire, else the exposed revolving drive shafts can pick up and wind the stuff around 'em. Chapters 2 thru 6 of your " Wheeled Vehicle Drivers Manual" (TM 21-305, Dec 56) has some good driving info for you-check it out. Driver know -how and common sense work hand-in-hand when it comes [0 handlin' your MIS 1 ... let's use it. 27

ers, stumps, etc., strewn here and there • ... pick your trail right careful-like. If you've straddled one of the objects

1\ '

and misjudged its height, the fap taken by the undercarriage could mean a disabled truck. Keep the eagle eye peeled for communication wire, else the exposed revolving drive shafts can pick up and wind the stuff around 'em.

Chapters 2 theu 6 of your "Wheeled Vehicle Drivers Manual" (TM 21 -305, Dec 56) has some good driving info for you-check it our. Driver know-how and common sense work hand-in-hand when it comes to handlin' yo ur MIS1 ... let's use it. 27

WllltAl10N OIOIIS 1.0 '-2010.200-20. 1•• 2 Nov Propelling Uni'. Mar) ... OuIlI«trd, """"'1 oAd

Treg.,,''''' Ha.bormool.- Mod OA6!TCI. W ' _:1210.200-20.1, .2. 4 No. Scrw· ""h.C;r... Iot~O:I'IOIoio:MDtoIilll>\l\l MlQtio:l. StoIlClord SIHt Work> In , Mod ~'.-56CH1 to $-4on$-'.... o.c 0... Set, Got entf, lO t:.W. KoIn.....t ~ Mod mo.

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to "2U o.U5-10 ,* T.k 21't M35Al lM