PS Magazine - TB 43-PS-567
PS, The Preventative Maintenance Monthly
ISSUE 567
FEBRUARY 2000
One-piece
dowels
keep
sprockets
in place
oose sprocket hub mounting hard-
ware on the final drive can put your
M88A1 recovery vehicle or AVLB out
of control.
Look for shiny spots or flaky rust
around the nuts. That signals loose
fasteners. If you find any, tell your
mechanic.
dding FRH to your tank’s hydraulic reservoir can turn into a juggling act for
just one crewman.
The screen in the reservoir opening is too short so you can’t insert the
funnel and turn it loose without the funnel falling out. That means you’re
holding the FRH in one hand and a funnel in the other while trying to keep
hazardous fluid from spilling on you.
Some crewmen solve the problem by punching a hole in the screen so the
funnel will stay in place by itself. That leaves
both hands free to pour the FRH.
But this “fix” often lets metal screen
fragments get into the hydraulic system.
And with the screen torn, it’s easy for
other contaminants to get into the reser-
voir, too.
Don’t let this happen to you. When
it’s time to add more FRH to the
hydraulic reservoir,
get the help of
another crewman
. With one of you
holding the funnel and the other pour-
ing, the only thing that gets in your
hydraulic system is fresh FRH.
M1-Series Tanks . . .
M88A1 Recovery Vehicle, AVLB . . .
Damaged screen
contaminates
hydraulics
It’s OK to use bushings on one
sprocket and two-piece hardware on
the other, but
never
mix the two on
the same sprocket. The nuts will loosen
and you’ll lose the sprocket.
Switching over to the one-piece
dowel eliminates one other problem,
too. You’ll never have to worry about
how to get a stuck bushing out of the
sprocket again.
Right now, your only choice is to
remove all the hardware and let the
weight of the sprocket pull the stuck
bushings out. That’s dangerous for you
and hard on the sprocket.
One way to keep the hubs tight is
to get the nut and bushing setup re-
placed with dowels, NSN 5310-01-123-
6782. Since the dowels are one piece
instead of two, there’s less chance of
loosening.
Look for
shiny or
rusted
spots
around
nuts
i told you my
sprocket nuts were
loose
, but you
wouldn't listen!
PS 567
18
FEB 00
wow!
jones
oughta be in the
movies
!
let's
see if he can
pass his hydraulic
screen test
!
PS 567
19
FEB 00
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