PS Magazine - TB 43-PS-587
PS, The Preventative Maintenance Monthly
ISSUE 587
OCTOBER 2001
PS 587
OCT 01
19
M88A1 Recovery Vehicle…
A
ppendix J in TM 9-2350-256-20 says to lube your M88A1 recovery vehicle’s
boom foot pivot pins and boom pivot pins quarterly with GAA. But a lot of pins don’t
get the lube they need.
Eventually, unlubed pins rust to the boom foot. You can tell that’s happened when
the boom pivot pin rotates as you raise or lower the boom.
By then it’s too late to lube and you’ll have to call in DS for help. They’ll pull the
pin, inspect the hull trunnion and the boom foot for rust, and remove any rust with
steel wool.
Once the boom pin is reinstalled, make sure it’s locked in place by the retainer. The
pin shouldn’t slide in or out of the trunnion.
If you don’t get the pin and trunnion fixed, the trunnion will eventually elongate.
The boom is shot until it can be repaired at depot level.
M113A2 FOV…
Check the gap between the pin and the trunnion wall, too. A gap of .005 to .025 inch
is OK. Anything more and you should have your vehicle inspected for depot overhaul.
‘course, you can save yourself this extra work and downtime if you just lube all the
boom pins when the TM calls for it.
Check clamps and look
for damage to hose
Boom
Foot
Needs
Lube
[Whew]
I’m glad
that lube
job is
finished!
hey!
you didn’t
lube my
boom foot
pivot pin!
what’s
wrong?
Don’t forget to lube
boom foot pivot pins…
…and boom
pivot pins
D
irty air is an engine killer for your
M113A2 carrier. That’s why you crewmen
need to keep a close eye on the engine’s air
duct hose, NSN 4720-01-060-2550.
Vibration loosens the two clamps, NSN
4730-00-908-6294, that hold the duct hose
in place. Then dirty, unfiltered air is pulled in
past the clamps and the engine is damaged.
Help keep your carrier breathing easy by
checking the clamps for tightness before
each operation. Eyeball the hose for cuts,
tears or other damage. Report any problems
to your mechanic.
587. 18-19 (C)
9/4/01
9:50 PM
Page 1
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