PS Magazine - TB 43-PS-563
PS, The Preventative Maintenance Monthly
ISSUE 563
OCTOBER 1999
PS 563
13
OCT 99
PS 563
12
OCT 99
aising and lowering the cab on your
MLRS seems easy enough, but there
are some potential problems to watch
out for.
Raising
Before raising the cab, eyeball the
cab hinge studs and nuts for cracks. If
you find any, let your mechanic know.
Don’t raise the cab until cracked studs
and nuts have been replaced. You don’t
want to be under that cab if the hinges
fail!
MLRS . . .
Release the tension on the elevation
mechanism after the hold-down nuts
are tightened. That way, there’s no pres-
sure on the mechanism while you’re in
operation. It’ll save on busted parts.
Release tension on
elevation mechanism
Lowering
After lowering the cab, lock it down
right or you could ruin the threads on
the hold-down nuts or crack the frame.
If the nuts are not seated or tight-
ened right, the cab sits cockeyed. The
frame can crack as the cab flexes. The
nuts can bind, too, so keep the threads
clean. Never cross-thread ’em or the
entire hold-down assembly has to be
replaced. Use a little oil on the threads
occasionally to make the job easier,
too.
Check hinge studs and nuts on outside.
..
Also, remove all equipment stowed
on top of the cab before raising it. The
elevating jack assembly can’t take the
extra strain, and falling equipment
could kill or injure you or others.
Slow and easy is the way to raise the
cab. The faster you go, the more the
cab rocks up and down. That puts a lot
of strain on the hinges.
Once the cab is up, check the hinge
studs and nuts on the inside, too. Again,
your mechanic should replace any dam-
aged ones.
While the cab is up is also the best
time for your mechanic to replace any
loose hinge nuts. That’s when the tor-
sion bar is under the least strain, so
most of the torque will go on the nuts.
Hold-down nut must be seated properly
okay,
let's get
this cab
raised
.
wait a
minute!
there are
a
few things
you
need
to
check
first
!
...and inside for cracks or looseness
PS 563
13
OCT 99
PS 563
12
OCT 99
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