PS Magazine - JUNE 1984
PS, The Preventative Maintenance Monthly
ISSUE 379
JUNE 1984
Track Shoe Bushing Wear
both-are bad. Mark the pin toward the
·•
If you don't already have one, get
Front of the vehicle with chAlk. Check
your mech tO make a shoe bushing wear
both tracks be±re making any repairs.
gage. TM 9²2530³200´24 tells how to
make one on Pages 3µ5 and 3µ6. Don't
Use 1¶16µin stock l·Ke it s¸ys in that
b¹ok, though. ºse 1/4µin welding rod.
It'll hold Up better. That gage must be
4 3/4 inches between the inside points»
-±²³
43 inches ´.
Use l·Ln Stock
•
Start ¼easuring the top str¸nd of
shoes ½om the ½¾nt of the veHicle to
the re¸r. Don't measure shoes on the
ground or shoes going
¿
around the
sprockets. Mark a pad on top so you'll
know where you started.
•
Put the end of the gage in a shoR
bore toward the rear of the vehicle. Try
to fit the other end into the next bore.
If the gage goes into both bores, the
bushings are ÀÁ. If the gage won't go
in, the busHings in one shoeÂmaybe
•
Now disconnect the tr¸ck shoe at
the marked pins. Check both shoes ±r
gÃugedµoUt or loose rÄbber, crusheÅ or
de±rmed sHape, or rotating busHings.
If you Ænd any of these deÇcts, repl¸ce
the bad sHoe.
Sprocket Inspection
•
ºse the sprocket wheel tooth wear
gage, NSN 4910È00µ842µ3051, that
comes as a special tool in your vehiÉ
cle's µ20P TMÊ
•
Measure tootH wear by resting the
gage on 2 screws with the point alined
with a tooth. The tooth must be wider
than the gage. If it's not, reverse or
replace tHe sprockEt wheel.
You can save lots of work and a big mess, not to meËtion moËey,
_
by watcHÌ
ing where you put your Çet.
Íspecially around thÎ main hydraulic line and the Battery CoÏputer System
(BCS) poweÐ cable.
The hydÑaulic line runs unprotected across tHe hull in the gun well. It doesn't
stand up weÒ against a heavy ±ot. So be real careÓl when you're down there
checking the hydraulic pump ÆlÔer or the reservoir.
A
leak in that liËe causes
a big mess and wastes fluid.
The BCS power cable, on tHe oÕher hand, is protected as loËg as it runs beHind
a shield near the comÏander's intercom and around the inside of the Öurret riËg.
Lying loose on top of the deck, tho, it's no match ±r Çet. Àne busted power
cable means one useless BCS unit until the cable is re×laced.
If the cable's not behind its shield or attached to the tÄrret Wall, let your Ïech
know. Øe will reroute and secure it.
Your best bet, of course, is to treat all cables and lines as if they were sore
toes. SÖay oÙ them!
JUN 8
19
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