PS Magazine - TB 43-PS-601
PS, The Preventative Maintenance Monthly
ISSUE 601
DECEMBER 2002
I
f your ammo carrier has a Hatz 2G40 auxiliary power unit (APU), chances are it
also has a water problem.
Rain and wash water get into the air
duct hose through the inlet duct. Since
the hose is clamped on both ends, the
water sits there until the reinforcement
wire inside the hose rusts.
Pretty soon, the APU starts overheat-
ing because it’s pulling hot air through
holes in the hose instead of the cooler air
it needs from outside.
Stop this damage by removing the hose
clamp, NSN 4730-00-908-6293, on the
APU side of the air inlet duct. With the
clamp gone, any water that gets inside
will drain away before rust can set in.
The duct hose is compressed tightly
between the APU and inlet duct, so it’ll
stay in place even without the clamp.
DEC 02
9
PS 601
DEC 02
8
M992A2 Ammo Carrier…
D
oes your ammo carrier have a Hatz 2G40 auxiliary power unit (APU)? If so, the
overhead fan relay assembly bracket is in danger.
In its current position, the bracket is easily damaged when the APU is removed
or installed. Since the bracket isn’t available in the supply system, you have to
replace the entire fan relay assembly, NSN 5945-01-456-6726.
Protect the bracket by having your mechanic relocate the fan relay assembly to
the backside of the APU intake shroud. The bracket attaches easily using one of the
existing shroud mounting bolts.
holy cow!
are you
on
fire!?
no! but my APU
is overheating
because of a
leaky duct hose!
with that
new APU,
you should
be
good
to go!
yeah, if only you
hadn’t broken my
overhead fan
relay assembly
bracket…
Relocate
fan relay
assembly
here
Remove
this clamp
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