PS Magazine - TB 43-PS-690

PS, The Preventative Maintenance Monthly

ISSUE 690

MAY 2010
PS Magazine - TB 43-PS-690 - Page 3 of 33
2
PS 690
MAY 10
M
echanics, when it’s time to replace a Stryker’s axle shaft, there’s a little more
involved than just slapping the shaft in place.
If you look closely, you’ll notice two arrows, one on each piece of the shaft. Those
arrows aren’t there for decoration. They’re needed to help you line up the new shaft
with the differential.
If
the
arrows
aren’t
lined up when the shaft is
installed, you’ll tear up a
perfectly good differential.
So take your time, locate
the arrows and make sure
they line up when you
install the new shaft.
Next, apply a light coat of antiseize compound, NSN 8030-00-
597-5367, to the threads of the kit’s screw. That makes the screw
easier to remove next time.
Finally, torque the screw. The cargo hook used on your tank
will determine the torque value. If the hook has a recessed area,
torque the screw to 290-350 lb-ft. If the hook is solid, torque the
screw to 290-310 lb-ft.
After closing the exhaust grille doors, you need to secure
them in place with the 100-600 lb-ft torque wrench, NSN 5120-
01-113-9564, from your TM’s additional authorization list.
Unfortunately, some
crewmen try to use
a regular wrench to
tighten
the
screws.
If the screws are not
torqued, they loosen.
Loose screws let the
grille doors bounce up
and down and tear the
seal. Then you have to
call in a mechanic to
replace it.
Also, you may notice a little gouging on the surface of the
cargo hooks as you torque down the screws. The cargo hooks are
made from a lower-grade steel, so some gouging is normal.
Don’t let it stop you from tightening the screws to the proper
torque, though. Replacing a cargo hook is a lot cheaper than
buying a new grille door or exhaust seal.
M1-Series Tanks…
Seal PM Is a Team Effort
Stryker…
Line Up Axle Shaft Pieces
so do the job
right the first
time, crewmen.
make sure
you use the
hardware from
the rear door
hook kit, nsn
2510-01-493-
6140, to secure
each door.
checking your tank’s
engine exhaust seal,
is a monthly check,
crewmen.
but it’s what
you do after the
check that can
make or break
the seal deal.
Bouncing door tears up seal
Torque screw for recessed
hook to 290-350 lb-ft…
Make sure arrows line up when installing new axle shaft
time to check
your engine
grille seal
again!
great! just make sure
you remember to torque
my exhaust grille door
screws when you’re
finished!!
…and screw for solid
hook to 290-310 lb-ft
690.02-03.indd
1-2
3/28/10
10:35:19 AM
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