PS Magazine - TB 43-PS-626
PS, The Preventative Maintenance Monthly
ISSUE 626
JANUARY 2005
PS 626
JAN 05
2
PS 626
JAN 05
3
HEMTT…
Dear Editor,
While stationed in Iraq, the heat sometimes got so bad that the
thermostat inside our HEMTT’s fan clutch actuator would lock in the
closed position. If the cooling fan can’t come on, the engine overheats.
Cargo is too precious to leave beside the road and you don’t want
to be stuck by yourself in the boonies. So we came up with a quick fix
to keep the fan turning and the truck in action.
If the engine starts to overheat and the cooling fan isn’t turning,
follow these steps:
1.
Disconnect the intake
and outtake lines on the
actuator.
2.
Remove the 90° fitting
from the actuator.
3.
Screw the intake and
outtake lines into the 90°
fitting. The threading on
one side isn’t perfect, but it
will hold enough air pressure
to activate the fan.
4.
Use a wire tie to hold
the lines out of the way of
the fan.
With the actuator
bypassed, the fan will work
continuously. That keeps the
engine cool and allows you
to complete the mission.
SSG Brad K. Brubaker
3/69th AR
Ft Stewart, GA
(Editor’s note:
An excellent BDAR fix,
Sergeant. Just remember to
report it immediately after
the mission so a mechanic
can fix the problem.)
don’t let
clogged
vent valves
put
you
in
danger!
Twist and tap cap to check
Connect lines to
90° fitting and
tie out of way
oh, man!
this is
the
last place
I
want to be stuck
with an overheated
engine!
D
rivers, remember to check the vent valves
on all four axles during the weekly checks.
If the valves won’t vent, your HEMTT
blows seals. Oil leaks out. Enough leakage
and the oil seeps into the brake pads. Then
you’ll have a hard time stopping.
It’s easy enough to check a vent valve.
Crawl underneath the vehicle and twist the
cap to loosen any dirt inside. Tap the cap. it
should depress and spring right back.
a quick
bdar fix can
get me on
the road!
626.02-03(C!)
11/21/04
5:58 PM
Page 1
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