PS Magazine Issue 146 1965 Series [146 ed.]

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Citation preview

THE.

PIlVtIlTM IWITDWtCl

Issue No. 146

MOHTHlY

1965 Serle,

IN THIS ISSUE AREPOWER 2·17 Speci.1 fearure-8e VOlIf OWn In$flteior . . MaS MIdline GItn 2-11

GROUND MOBILITY

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COMMUNICATIONS

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GENERAL AND SUPPlY Ufe Presefvers51,5!1 DA form 3t.1 Ttmplate M Brldgefllumbefs 60 PublleatlOl1$ 2.

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When you spot an engine idling ... you spot serious engine trouble in the ma king. 11 may not show at the moment. but a lot of idling chugs-up costly and uncalled for main tenance problems. It's not only hard on trucks. . it 's rough on tanks, generators, tractors an ything with an engine. Letting your vehicle idle. for example, may save you a couple of seconds when you hop back in (or keep you toasty warm while you wait). but maintenance records prove that the practice guaran· tees• Low oil pressure ... not enough lubrication. • Sludge in the engine oil ( with its serious mischief. ) • Fouled spark plugs. • Electrical system problems. • Wasted fuel. In addition to deadlining your equipment. tying up your maintenance friends and equipment and using up money, leaving a parked vehicle idling can get you in other kinds of trouble ... like it the MP's are in the neighborhood. So make a note somewhere handy .. . like on the tip of your nose. No unnecessary idling. Just remember . . the engine you operate today is your combat fighting gear tomorrow ... IF-.

!i"Ht fIIOEIlM IWImNANCI Mq,iMY !S$U. NO'.' 1-4' 196!LSerle$

IN THIS ISSUE AREPOWER2·17 StIe:elII re:atw~e 't'OIIr Ownlnspeeror:-£; M8!i,~ine~i2'11

GROUND MOBIUTY

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FIREPOWER P'1t4t1tt4 8f YOUR OWN

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ASSEMBLIES

12

Reet, solid, like real far-out ... this M85. Ask anylx>dy who's got onc. Yessir, this automatic belt-fed cal.50 baby's born to the mission. Zero her in at umpty hundred meters and she's a super-duper snooper pooper. Open 'er up on the line and shc'll mince the

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That M85 up there in the M19-typc cupola is a tanker's drcam gun. Easy to operate, quick on the change-over, simple in design, she's lots easier chan most to keep happy. Herc's a handy inspection and PM dpshect you can use while field-stripping your weapon this week. Get the habit of ogling hcr this way eve ry time you scrip 'er a nd you'll come out ahead all around. And while you're stripping your baby, be real careful you don't lose anything ... especially littlc things like pins, sprinl,>"S and retainers. Thc -itcms in bold type are the ones that need pronto attention. If you can't take care of them yourself, get your armorer to lend a hand.

Reet, solid, like real far-out ... this M85. Ask anybody who's got one. Yessir, this automatic belt-fed cal.50 baby's born to the mission. Zero her in at umpty hundred meters and she's a super-duper snooper pooper. Open 'er up on the line and she'll mince the That M85 up there in the M19-type cupola is a tanker's dream gun. Easy to operate, quick on the change-over, simple in design, she's lots easier than most to keep happy. Here's a handy inspection and PM tipsheet you can use while field-stripping your weapon this week. Get the habit of ogling her this way every time you strip 'er and you'll come out ahead all around. And while you're stripping your baby, be real careful you don't lose anything ... especially little things like pins, sprinh'"S and retainers. The Items in bold type are the ones that need pronto attention. If you can't take care of them yourself, get your armorer to lend a hand.

Do this regularly and you'll find less carbon depositsand you'll get rid of that big bang ... the bang caused by increased chamber pressure due to oil in the bore.

Be sure you dUD tbose twO barrel bearing surfaces. Keepiog .em smooth means a Jonger life for. yow- M85 and .. better.c~ fo[you 10 hit~you'rHlming .,. But, don't ever use abnsives like steel wool or emery clOth or crOCUS cloth on •em. Tbese'll cansarrcl I""lcing .I"g . . . :1S mote'n one $DY found Out~, There're rWo sure;..cu.res, thoug_PI (Preventive In.pection} hefore YOu asStmble it/and :P~{(PreYRAia,

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~tcr.w."""""""''''~FtII~' ~ sI.>UId l>a.:k ...hen -.. I ~:;=.::;:::=;:~~=;;===;=~ let... ,~ "'B", )'OIl Be ~c:atduI _to ' - ~ IL - - - - - - - - - - - - - ' ~.~~dtIIetl'~~ili IiC!tpl.....,.'~ pIaS;Too 1IlUcli~ tiIdag and ~ will ClOUSe 'em to &it ...... AIoct,,)'OII'd be smart _ to Oft ....~""""'ra_ _'n Y'!'1. IIirR to. Vouii_. em stake thlO'. ~ IiuIe pias in place, '" let him know~ iFd.cy'.., ~ out.

J!f1tIIm

14

You should always check the safety for positive engagemenc with the sear. But do this while the weapon's assembled. Remember, never charge your M8S while in the SAFE position. The safety must be in the FIRE position before charging or firing.

ARROWS MUST LINE UP.

Look for foreign deposits like cacbon, grease, mud and the like on the barrel bearing surfaces inside the barrel support. When you clean 'em off, though, be careful you don't change the critical dimensions and finishes. You just have to remember that the larger these inside bearings are, the greater will be the whip. (This is just the opposite of the bearings on the outside of the barrel. The smaller the outside bearings, the greater will be the whip.) Too much cleaning or the wrong kind of cleaning of either of these bearing surfaces could make you

When you're putting the barrel together, take it easy and make sure the arrows line up and you hear a definite click. It's a good idea before you fire to give a little extra twist right and left to be doubly sure it's locked tight. Don't worry too much about loose rivets unless you can see movement between the side plates, bottom plate or barrel support. Also, don't fret if you can squeeze a bit of oi l from between the receiver parts. Here's something to watch for real careful-like: See that the barrel laKh and Jock won't bind for lack of lube. They should move freely. Also make sure you have a positive lock of the barrel in the receiver. Otherwise, Amigo, that barrel could come loose and go flying down the range! 15

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