TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 250 of 481
TM 9-2320-272-10
2-149
(5)
Pull transmission power takeoff control lever (2) back to ENGAGE.
(6)
Return transmission selector lever (1) to N (neutral).
(7)
Depress spring (4) to release safety latch (5) and push dump body con-
trol lever (6) back to raise dump body.
NOTE
• Dump body will stop automatically when fully raised.
• Engine rpm should not exceed 1000 rpm during dumping
operation.
(8)
To lower dump body, pull dump body control lever (6) full forward to
lower dump body.
CAUTION
To prevent dump body from raising during vehicle operation,
dump body control lever must remain locked in N (neutral) posi-
tion.
(9)
Return dump body control lever (6) to N (neutral) when dump body is
completely lowered. Secure lever (6) with control lever safety latch (5).
(10)
Push power takeoff control lever (2) forward to DISENGAGE.
(11)
Push tailgate control lever (8) up and back as far as it will go to lock
tailgate (14) in closed position.
c.
Rocker-Type Dump Operation.
NOTE
This operation requires two crewmembers. Perform steps 2
through 6 on left side of vehicle first.
(1)
Position vehicle for dumping and apply parking brake lever (7). Place
transmission selector lever (1) in N (neutral).
(2)
Remove chain (16) from upper chain slot (11).
(3)
Thread chain (16) through chain bracket (15) at corner of tailgate (14).
(4)
Remove bracket pin (13) in upper hinged bracket (12).
(5)
Unfasten retaining hook (9) and swing tailgate wing (10) fully to the
rear of vehicle.
(6)
Insert bracket pin (13) in upper hinged bracket (12).
(7)
Repeat steps 2 through 5 for right side of tailgate (14).
(8)
Remove bracket pin (13) from upper hinged bracket (12).
(9)
Lower tailgate (14) and insert bracket pins (13) from upper hinged
brackets (12) on both sides of the vehicle.
2-25. OPERATION OF DUMP TRUCKS (Contd)
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