PS Magazine - TB 43-PS-592
PS, The Preventative Maintenance Monthly
ISSUE 592
MARCH 2002
B
efore you tow a disabled tank with another M1, you need to do more than just
hook up the tow bar correctly. You also need to use an exhaust deflector.
A deflector funnels the hot
exhaust from the towing tank
upward and away from the dis-
abled tank. Without it, the
exhaust can damage the disabled
tank’s vision blocks, hatch cov-
ers, precleaner, and even the vul-
canized rubber on the scavenger
shaft. That means even more
repairs will have to be made.
Exhaust deflectors aren’t in the supply system, so you’ll have to make one. The
plans are in Fig 7 of Appendix D in the -20-1-5 TMs. If you have trouble mounting
the deflector to the exhaust grate of the towing tank, try grinding down the deflec-
tor’s lower hook a bit to help it fit.
PS 592
MAR 02
14
PS 592
MAR 02
15
M1-Series Tanks…
M1-Series Tanks…
Dirty Oil = A
Dead
Engine
Dirty Oil = A
Dead
Engine
I
t's been said, "He who hesitates is lost." That's something that tank drivers who see
the ENGINE OIL CLOGGED FILTER light come on can relate to.
If you see that light, don't hesitate. Shut
down your tank
now
and call in your
mechanic! Otherwise, the dirt, sand and
other gunk that's in the oil will shut down
the engine for you—permanently.
Dirty oil bypasses a clogged filter, car-
rying dirt into the engine. This bypass
feature is to keep the engine running
when you're on the battlefield.
But that dirty oil still gets into engine
parts. The longer you run with a clogged
filter, the more damage grit and dirt
cause.
Mechanics, if the light stays on after
changing the filter element, the problem
is probably a bad by-pass pressure switch
on the engine oil pump assembly. Replace
the switch with NSN 5930-01-089-9142.
Protect towed vehicle from heat with
exhaust deflector on towing vehicle
what in
the heck
happened
to you!?
[cough]
I got
towed
back…
[cough]
…without
an exhaust
deflector!
Stop engine if
ENGINE OIL
CLOGGED FILTER
light comes on
Replace
bad
bypass
pressure
switch
What to Know
Before
You Tow
If you
don’t
clean my
oil filter,
I’m a
goner!
592. 14-15 (C)
2/5/02
5:19 PM
Page 1
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