TM 9-2320-279-20-2
Change 4
16-198.3
Cab and Body Maintenance Instructions (Cont)
16-49.2. MANHOLE COVER PRESSURE ADJUSTMENT (M978) (MODEL B).
Supplies
None
This task covers:
a. Clearance Check
c. Follow-on Maintenance
b. Adjustment
INITIAL SETUP
Personnel Required
MOS 63S, Heavy wheel vehicle mechanic
Equipment Condition
TM or Para
Condition Description
TM 9-2320-279-10 Shut off engine.
References
None
Special Tools
None
Models
M978
Test Equipment
None
Special Environmental Conditions
None
General Safety Instructions
No smoking, flame, sparks, and hot or glowing
objects within 50 ft (15 m) of vehicle.
a. Clearance Check.
WARNING
Failure to relieve tank pressure may result
in sudden, unexpected loss of pressure.
Failure to comply may result in personal
injury or death.
(1)
Raise latch (1).
(2)
With closure assembly (2) firmly closed, check clearance between latch (1) and closure
assembly (2). If latch just touches closure assembly, adjustment is correct.
NOTE
If adjustment is correct, do Step (3). If not correct, adjust.
(3)
Lower latch (1) to horizontal closed position.
