PS Magazine - TB 43-PS-722
PS, The Preventative Maintenance Monthly
ISSUE 722
JANUARY 2013
10
PS 722
JAN 13
I
f your unit has FMTVP1, FMTVA1P1,
FMTVA1P2, LVAD and HIMARS trucks
with air conditioning, you may have a
problem. There could be contact between the
engine fan clutch bolts and the A/C V-belt
pulley. The contact itself
doesn’t
make your
truck non-mission capable, though.
But the bad news is, depending on how
much contact there is between the pulley and
fan clutch, the fan clutch could fail or the fan
clutch assembly could be damaged. And that
does
make your truck NMC.
The good news is a spacer plate is
available through BAE Systems to ±x
this issue. The spacer plate provides
more clearance between the fan clutch
and A/C V-belt pulley. Use it if the fan
clutch retaining ring bolts are worn and
need to be replaced or if the fan clutch
itself is damaged.
Get Well Plan
See TACOM MAM 12-025 for complete fan clutch inspection and replacement
instructions. It’s available online:
Here’s a summary of what you should do:
1. Look for metal-to-metal contact from the fan clutch bolt heads to the face of the
A/C pulley.
2. If you see any damage to the fan
clutch, replace it and install the new
spacer, PN GTS006001, on the new
fan clutch. Refer to the TACOM MAM
for details on how to get the spacer.
3. If the fan clutch retaining ring bolts
are excessively worn and can’t be
tightened, replace the fan clutch and
install the new spacer plate.
4. Undamaged or slightly worn
retaining ring bolts with no other
signs of damage to the fan clutch or
A/C pulley can be tightened. Torque
loose retaining ring bolts to 30 lb-in.
5. If you can’t use this torque
wrench method, use this alternate
tightening method: Once the bolt
is seated and the lock washer is
compressed with no gap between
the retaining plate and clutch,
tighten the bolt with an additional
1
/
4
to
3
/
8
turn.
6. After inspecting and following
these steps, use a paint pen to
mark serviceable fan clutches:
“Insp. Month/Year”, for example,
Insp. 12/12.
Fan clutch spacer plate, P/N GTS006001,
provides extra clearance
Fan clutch retaining ring bolts may
become loose due to contact and
heat friction with A/C pulley
Fan clutch retaining bolts with small clearance
to A/C pulley can cause damage
FMTV…
I think I have a
problem
with my
fan Clutch.
can
you
hElp
Me?
Mark “INSP MM/YR” here
A/C V-Belt Pulley
Interference
722 10-11.indd
1-2
11/26/12
5:42 PM
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