PS Magazine - TB 43-PS-573
PS, The Preventative Maintenance Monthly
ISSUE 573
AUGUST 2000
PS 573
5
AUG 00
PS 573
4
AUG 00
CAUTIONS take up a lot of space
in the starting procedures for the PLS
in TM 9-2320-364-10 and for the HET
in TM 9-2320-360-10.
Some of you need to let a couple of
those CAUTIONS sink into the space
between your ears. Like these:
CAUTION:
If the OIL PRESS
gauge does not show engine oil
pressure within 10–15 seconds after
starting engine, shut down the engine
immediately and refer to Trouble
shooting Symptoms in Para 3-3 for the
PLS and Table 3-1 on Page 3-13 for
HET. Lack of lubrication may damage
the engine.
M916/917/918/919/920 Trucks . . .
Move Transfer
Pump Spacer
A
s the temperature climbs toward
summer heat, you need to make a
spacer change to save transfer oil
pumps on your M916, M917, M918,
M919 and M920 trucks.
You must move the spacer to its
warm-weather position to put the pump
back to work as temperatures climb.
Otherwise, the oil can’t lubricate the
transfer, leading to burned-out gears.
Eyeball Para 7-9 and associated
figures of TM 9-2320-273-20 for the
details. For warm weather operation,
move the spacer from between the
pump and the transfer case to its stowed
position behind the pump. That engages
the pump and lets the oil cool the gears.
M1074/M1075 PLS, M1070 Tractors . . .
If you just blow in to the motor pool
and shut down without a cooldown,
the turbocharger spins to a halt with-
out oil pressure to keep it lubed and
cool. Heat and high rpm help to ruin it
way before its time.
Pay attention to the CAUTIONs. And
have a nice day!
Stow spacer for warm weather operation
CAUTION:
Increase engine speed
to 800–1,000 rpm with the transmis-
sion in neutral and hold for 3–5 min-
utes to allow the turbocharger to slow
down and cool off. The turbocharger
may be damaged if it’s not allowed to
cool off.
CAUTION:
Do not operate the en-
gine above 1,000 rpm during warmup
until the OIL PRESS gauge indicates
25–30 psi at 800–1,000 rpm. Lack of
lubrication may damage the engine.
Cool down at 800–1,000
rpm for 3–5 minutes
No oil pressure within
15 seconds? Shut down!
No more than 1,000 rpm during warmup
What each CAUTION means is don’t
jump into the cab of your truck, hit the
starter, race the engine to build up air
pressure and then tear off on your mis-
sion. That tears up engine parts and
costs your unit time and money.
When you complete your mission,
note the final CAUTION before shut-
down:
don’t
overlook the first
few pages of
my tm!
HMMM,
I
knew
that caution
about my oil
pressure was
in here.
When temperatures turn cold in the
fall, move the spacer back to the cold-
weather position by moving it from its
stowed position to between the pump
and the transfer case. That disengages
the pump.
PS 573
5
AUG 00
PS 573
4
AUG 00
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