TM 9-2320-279-10-1
Change 8
2-157
M977 Through M985 General Operating Procedures (Cont)
CAUTION
Do not operate engine above 1000 rpm during warm-up
until OIL PRESS gage indicates 50 to 70 psi (345 to 483
kPa) for FHTV model vehicles or 40 to 60 psi (276 to
414 kPa) for Non-FHTV model vehicles. Lack of
lubrication may damage engine.
(6)
Press throttle treadle (7) until tachometer (8) reads 800 to 1000 rpm.
(7)
Run engine at 800 to 1000 rpm for about 3 minutes.
NOTE
If red and green needles on AIR PRESS gage do not
read 60 to 120 psi (414 to 827 kPa) after warm-up, shut
off engine and notify organizational maintenance, to
prevent severe engine damage.
(8)
Check that AIR PRESS gage (9) reads 60 to 120 psi (414 to 827 kPa).
Air pressure indicator (5 or 5.1) will light and buzzer will sound until
both needles reach 60 to 75 psi (414 to 517 kPa).
