Cab and Body Maintenance Instructions (Cont)
16-49.2. MANHOLE COVER PRESSURE ADJUSTMENT (M978) (MODEL B).
This task covers:
a. Clearance Check
c. Follow-on Maintenance
MOS 63S, Heavy wheel vehicle mechanic
TM or Para
TM 9-2320-279-10 Shut off engine.
Special Environmental Conditions
General Safety Instructions
No smoking, flame, sparks, and hot or glowing
objects within 50 ft (15 m) of vehicle.
a. Clearance Check.
Failure to relieve tank pressure may result
in sudden, unexpected loss of pressure.
Failure to comply may result in personal
injury or death.
Raise latch (1).
With closure assembly (2) firmly closed, check clearance between latch (1) and closure
assembly (2). If latch just touches closure assembly, adjustment is correct.
If adjustment is correct, do Step (3). If not correct, adjust.
Lower latch (1) to horizontal closed position.