PS Magazine - NOVEMBER 1979
PS, The Preventative Maintenance Monthly
ISSUE 324
NOVEMBER 1979
I
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l
i
I,
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Steer Box Needs Help
What's worse than front steering
gearbox failure on your M561 or M792
1 V-ton truck? No replacements!
And both are happeninG. Those
steer boxes Don±t hold up too gooD, and
the headsheD is hard presseD to Keep a
supply of new ones on the shelf.
But sevEral things can be done to cut
down on steer box failure²and this³ll
cut Down o´ the demanD for new steer
boxes.
Water getting into the box is the
biggest cause of failure. YoU can head
off
this
problem
by draining and
refilling
the
box
at
quarterlµ
intervals¶every
3,000
miles
or
3
months. Pull this service, too, after
any swimming or fording operations.
26
Right now,o´ly a semiannUal checK
of the oil leveL is required by ·O 9¸
2320¹242¹12 (Apr 72). But your own
command ca´ put the extra servicing
in your local mainte´ance SOP.
More help for the steer boX is
spelleD out in TM 43¹0143 (Jun 77):
Para 4¹ºo²Instructions for drilling
a small h»le in the cab floor to drain
off water before it can get into the
steer box.
Para
4¹5p²Sealing
compoUnD
between the box and housing to Kee¼
water out.
Para ½¾5t¶Pressure¹checKing the
box (by yoUr sUpport) to see if water
can get in¿
_
_
-.
Dear Hal-Mast,
Is theRe some way to check for water
sitting on the bottom of a fueL tAnk?
SFCK
.
±
²
M
³
Àear Sergeant Á·.M.,
Âs "water indicating paste,Ã NSN
6850¹00¾090¾1361 or NSÄ 6850¹00¹
001¹4194
for a 3Åoz tuÆ or NSÄ
6850Ç00¹001Ç4193 for a 2ȹozjar. Âse
CTA 50¹970 as your authorization.
This worKÉ only if there's a straight,
clear Drop from the filler opening to
the bottom of the tanK, ÊecaUse µou
Have to use a sticK or rod to get a good
reading.
You don't
Need mUch
You smear a thin streaK of this
paste uË froÌ the end of a clean sticK
or roD. Íhen Drop that enD into the
fuel tanK until it toÎcHes bottoÌÏ
If
yO±r Tank's
gOT a sCrEEn inside,
²akE iT OuT. DROp
THE sTiCk sTraIgHT
dOw³ Till it
TO±ChEs bOTTOM
Pull it out anD cHeck the color of the
paste. WaÐer changes tHe color²from
Green/yellow to reD, fÑrinstanceÏ Fuel
above tHe water liÒe does not change
the color of the paste.
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