PS Magazine - TB 43-PS-621
PS, The Preventative Maintenance Monthly
ISSUE 621
AUGUST 2004
PS 621
AUG 04
23
Missing Nut?
The fan-tension assembly in the vehicle’s engine compartment is used to adjust
the V-belt tension for the radiator fan.
Vehicle vibration causes the rod
nuts on the fan-tension assembly to
loosen.
The rod’s top nut has also
been
known to get lost during
repairs or V-belt adjustment.
Problem is, one nut will work
loose, which won’t keep the right
amount of tension on the belt.
That
means the V-belt comes loose, caus-
ing the engine to overheat—not
good, especially in the
desert!
So, make sure there are two rod nuts on the fan-tension assembly.
If a nut is
missing, replace it with NSN 5310-00-732-0559.
The nut is shown as Item 4, Fig
130 of TM 5-2350-262-24P.
Retainer Strap Mishap
An ounce of prevention is worth a pound of fire fighting in the vehicle’s engine
compartment.
Start the prevention by checking the
five hydraulic lines that are mounted
directly across from the engine’s exhaust
manifold.
Each line is held in place by a retaining
strap that keeps it snug against the wall.
But straps get misplaced when a
hydraulic line is repaired, or when the
engine is removed by support.
Operating
the earthmover when a strap is missing
allows those hydraulic hoses to rub up
against the engine’s exhaust manifold.
That can cause a leak and a fire.
So replace a missing retainer strap with
NSN 5340-01-179-7530, or secure the
lines with a tie-down strap, NSN 5975-
00-570-9598, until the retainer strap is
replaced.
Straps are shown as Item 40 in
Fig 140 of TM 5-2350-262-24P.
AUG 04
22
M9 ACE…
A Little Cleanup
The fan shroud makes a convenient shelf for tools and
coffee cups.
No sweat, unless you leave those items sitting there when
you close the rear access panels.
Anything left behind bounces off the shelf—then ends up
hitting the fan blades after the engine starts and the vehicle
starts moving.
A fan with broken blades will cause the
engine and transmission to overheat.
Before you hop
out of the engine
compartment, take
a quick look around
to make sure noth-
ing gets left behind.
It can make the dif-
ference between a
completed mission
and waiting for help
to arrive.
Mechanics, a
few areas in
the ACE’s engine
compartment
need your
attention when
you’re pulling
maintenance.
make sure
you
don’t
leave
me
behind!!
Make sure there
are
two
rod nuts
on fan-tension
assembly
Look for lines rubbing
on exhaust manifold
Strap keeps
hydraulic
lines in
place
here are some
ways to take care
of my engine
compartment!
621. 22-23 (C)
7/3/04
12:50 PM
Page 1
Click here for a copy of this article to email to a friend
Back to TopBack to Top
