TM 9-2320-279-20-2
16-198.4
Change 4
Cab and Body Maintenance Instructions (Cont)
16-49.2 MANHOLE COVER PRESSURE ADJUSTMENT (M978) (MODEL B) (CONT).
b. Adjustment.
(1)
Raise latch (1) and open closure assembly (2).
(2)
Remove plug (3) from closure assembly (2).
(3)
Loosen locking nut (4).
(4)
Close closure assembly (2) and hold firmly closed. Latch (1) should be in vertical position.
(5)
Adjust screw (5) until proper clearance between latch (1) and closure assembly (2) is obtained.
Refer to clearance check.
(6)
Open closure assembly (2) and tighten locking nut (4), making sure screw (5) does not turn.
(7)
Recheck clearance and readjust if necessary.
(8)
Install plug (3) in closure assembly (2).
(9)
Close closure assembly (2) and lower latch (1).
c. Follow-on Maintenance. None.
