TM 9-2320-279-20-3
M978 Tanker Maintenance Instructions (Cont)
25-18. V4 RELIEF VALVE REMOVAL/INSTALLATION/ADJUSTMENT (CONT).
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
25-90
Remove cap (9) from
control assembly (10).
Hold screw (11) and loosen
nut (12).
If Soldier A gets reading less
than 55 psi (379 kPa),
Soldier B turns screw (11)
clockwise until reading is
55 psi (379 kPa).
If Soldier A gets reading of
more than 55 psi (379 kPa),
Soldier B turns screw (11)
counterclockwise until
reading is 55 psi (379 kPa).
Hold screw (11) and tighten
nut (12).
Install cap (9) on control
assembly (10).
Set TC/THROTTLE CONTROL
switch (6) down to OFF position.
Pull back on PUMP
ENGAGEMENT LEVER (5) until
locked.
Push MC MANUAL CONTROL
EM VALVE lever (4) forward.
