PS Magazine - TB 43-PS-625

PS, The Preventative Maintenance Monthly

ISSUE 625

DECEMBER 2004
PS Magazine - TB 43-PS-625 - Page 7 of 33
It’s not so easy to check the cap
screw in the hub. You must first
remove an access plug to get to the
screw, then use a torque wrench to
tell if the screw is loose.
If the screw moves before you
reach 37 lb-ft of torque, it’s loose.
Replace it with a new lock washer,
NSN 5310-00-011-5093, and cap
screw, NSN 5305-00-068-0511. Dip
the new screw in sealing compound
and torque it to 37 lb-ft.
A
little vibration over a long period of time. That’s all it takes to loosen the bolts that
hold the HMMWV’s halfshafts in place, mechanics.
If a halfshaft flies loose, it can take out the brake lines, coolant tube and cause seri-
ous engine failure. That means you can’t go halfway when checking halfshaft bolts for
tightness.
Once you’ve cleaned away
the dirt and mud, it’s pretty
easy to see if the bolts that
hold the halfshaft to the rotor
are loose. Just look for shiny
spots under the bolt heads.
If you find a loose bolt,
replace both the lock washer,
the bolt, NSN 5306-01-185-
7048. Dip the bolt in sealing
compound, NSN 8030-01-
171-7628, before installing it
to help keep it tight. Then
torque the bolt to 48 lb-ft.
PS 625
DEC 04
10
HMMWV…
Check
both
ends of the
halfshaft for
tightness
at
every 6-month
service.
Clean away dirt, then look for
shiny spots under bolt heads
Remove access
plug to check
cap screw
waitaminit!
my halfshaft
bolts feel
loose!
on Halfshaft Check
Don’t Go Halfway
Aren't
you gonna
check 'em?
…guess that
takes care of
your semiannual
service!
625.10-11(C!)
10/29/04
9:45 AM
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