TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 683 of 1313
DUMP BODY WILL NOT RAISE - Continued
STEP
3.
IS CONTROL VALVE IN GOOD CONDITION?
a.
Visually check control valve for leaks and damage.
T0646DAA
CONTROL VALVE
Figure 3.
Control Valve.
b.
Tighten loose fittings.
CONDITION/INDICATION
IS CONTROL VALVE IN GOOD CONDITION?
DECISION
YES - Go to Step (4).
NO - Replace dump body control valve (Volume 4, WP
0720). Go to Step (6) to verify problem is solved.
STEP
4.
DOES CONTROL VALVE SHAFT MOVE IN AND OUT?
a.
Locate control valve.
T0646DAA
CONTROL VALVE
Figure 4.
Control Valve Movement.
b.
Check for in and out movement of control valve shaft.
TM 9-2320-272-23-1
0074
0074-4
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