TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 389 of 1417
Table
1.
Field Preventive Maintenance Checks and Services - Continued.
ITEM
NO.
INTERVAL
ITEM TO BE
CHECKED OR
SERVICED
PROCEDURE
EQUIPMENT
NOT READY/
AVAILABLE IF:
WARNING
•
Do not drain oil from wrecker hydraulic
pump, reservoir, cylinders, or motors, or
remove lines containing oil when oil is
hot. Failure to comply may result in injury
or death to personnel.
•
Do not remove hoist or winch hydraulic
hoses when engine is running or start
engine with hoist or winch hydraulic
hoses removed. High pressure fluids
may cause hoses to whip violently and
spray randomly. Failure to comply may
result in injury or death to personnel.
•
Do not drain oil from wrecker hydraulic
pump, reservoir, or cylinders or remove
lines containing oil when crane boom is
supported by hydraulic cylinder, or hoist
or winch cables are supporting a load.
Failure to comply may result in injury or
death to personnel.
•
Accidental or intentional introduction of
liquid contaminants into the environment
is in violation of state, federal, and
military regulations. Refer to local Unit
SOP for information concerning storage,
use, and disposal of these liquids.
Failure to comply may result in injury or
death to personnel.
(1)
Inspect rear winch and winch controls for loose
mounting and broken or missing parts. If mounting is
loose, tighten. If parts are missing or broken, replace
(Volume 4, WP
0674).
(2)
Inspect hydraulic pump for leaks. If leaks are
present, notify your supervisor.
(3)
Test automatic hoist drum brake for proper
operation (Volume 4, WP
0672).
(4)
With boom raised, inspect crane cylinder piston
rods for bends and scoring. If crane cylinder piston rods
are bent or scored, notify your supervisor.
(5)
While operating crane, observe that fuel pump
governor is maintaining 1,250 to 1,300 rpm during
TM 9-2320-272-23-2
0208
0208-10
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