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 675 of 1313
WRECKER HYDRAULIC SYSTEM DOES NOT OPERATE - Continued
STEP
3.
ARE ALL OIL LINES IN GOOD OPERATING CONDITION?
a.
Determine operating condition of all oil lines.
b.
Visually check all oil lines for damage and leaks. Refer to point to point schematics.
T0873DAA
Figure 3.
Oil Lines.
c.
Tighten any loose fittings.
CONDITION/INDICATION
ARE ALL OIL LINES IN GOOD OPERATING CONDITION?
DECISION
YES - Go to Step (4).
NO - Replace damaged hoses (Volume 4, WP
0711). Go to Step (5) to verify problem is solved.
STEP
4.
IS RESERVOIR LEAKING OIL?
Visually inspect reservoir drain plug and valve for oil leaks.
CONDITION/INDICATION
IS RESERVOIR LEAKING OIL?
DECISION
YES - Reservoir valve is leaking, Close leaking valve. Go to Step (5) to verify problem is solved.
YES - Reservoir drain plug is leaking. Tighten leaking drain plug. Go to Step (5) to verify problem is solved.
NO - Go to Step (5) to verify problem is solved.
TM 9-2320-272-23-1
0072
0072-4
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