PS Magazine - TB 43-PS-555
PS, The Preventative Maintenance Monthly
ISSUE 555
FEBRUARY 1999
Small Unit Support Vehicle . . .
Front cover
u
u
u
u
i can't believe
a little
snow
and
ice
has
stopped
you cold!
they didn't.
leaving me sitting
out here last summer
without grill covers
let
rust
and
corrosion
do me in!
someone
forgot to
bleed
my
coolant
and
it's
burning
me up
!
o Disconnect the battery.
o Remove the front engine hood.
If you’re parking your SUSV for a
week or less:
o Turn the key to STOP.
o Install the front and rear grill covers.
To get the front grill cover, use NSN
2540-01-309-1078. NSN 2540-01-309-
1079 gets the rear cover.
Never operate the vehicle with grill
covers installed
. Power train compo-
nents will overheat, often causing fires.
f your SUSV runs hot when it’s cold outside, it could be that its cooling system
needs a complete bleeding.
That’s
complete
as in both the
front
and
rear
heaters. Many times the rear
heater bleed point is overlooked, which keeps you from getting the air out of
the cooling system.
Air pockets in the system prevent circulation of coolant, increasing its
temperature.
Take a look at Pages 3-71 through 3-
73 of TM 9-2350-285-20. Note that
the rear heater coolant valve must be
open during the bleeding operation.
Follow the instructions carefully,get
all the trapped air out of the cooling
system and run cool in the cold.
Keep Locknut in Its Place
D
rivers, if your MLRS won’t shut down when you pull the fuel shutoff lever, a
missing locknut is the likely culprit.
The locknut, NSN 5310-00-088-1251, connects the
fuel shutoff linkage to the fuel shutoff mechanism.
Continuous use and vibration loosen the locknut. Once
it falls off, you’ll have to raise the cab and shut off the
fuel flow manually.
Make that locknut part of your weekly PMCS. While
the cab is raised, make sure the locknut is tight. If you
can move it with your fingers, it’s too loose.
Never try to re-tighten a loose locknut, though. The
nylon gasket inside the locknut is no good after one
use, so the locknut won’t hold. Get your mechanic to
replace the locknut.
MLRS . . .
hile your SUSVs are parked for the
off-season (after the thaw and before
the freeze), make sure you use grill
covers.
Without the covers, mechanical and
electrical components in the engine
compartment can rust and corrode.
Here’s what you need to do if you
know your SUSV won’t be used for
more than a week:
Turn the key to STOP.
Do PMCS.
Remove drain plugs and store them
in the front door pocket.
Install front and rear grill covers.
Bleed
rear
heaters
in
addition
to front
heater
Nut tight?
Rear cover
u
u
u
u
19
FEB 99
PS 555
18
FEB 99
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