TM-9-2320-260-34-1
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 1 OF 2
JULY 1994
TM-9-2320-260-34-1 - Page 18 of 657
TM 9-2320-260-34-1
MECHANICAL SYSTEMS TROUBLESHOOTING
SYMPTOM INDEX (Contd)
MALFUNCTION
NO.
MALFUNCTION
TROUBLESHOOTING
PROCEDURE
PAGE
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.
90.
91.
92.
93.
94.
95.
96.
97.
98.
99.
100.
DUMP BODY
Dump body will not raise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dump body will not lower.
.......
. . . . . . . . . . . . . . . . . . . . . . . . . .
Dump body will not hold in raised position . . . . . . . . . . . . . . . . . . . . . .
MEDIUM WRECKER CRANE (M816)
Crane boom fails to swing (other hydraulic systems operate
satisfactorily) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crane swings erratically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boom fails to extend or retract (other hydraulic systems operate
satisfactorily) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boom extends or retracts sluggishly.
. . . . . . . . . . . . . . . . . . . . . . . . . .
Hoist w-inch fails to rotate, operates too slowly, or operates erratically . . .
Boom fails to raise or raises and lowers sluggishly . . . . . . . . . . . . . . . . .
TRACTOR WRECKER (M819)
Crane boom fails to swing (other hydraulic systems operate
satisfactorily) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HYDRAULIC LIFTGATE (M820A2)
Liftgate will not open or close . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Platform does not stop at proper height. . . . . . . . . . . . . . . . . . . . . . . . .
Liftgate at incorrect angle when closed. . . . . . . . . . . . . . . . . . . . . . . . .
Liftgate fails cooperate on remote control . . . . . . . . . . . . . . . . . . . . . . .
Liftgate fails to operate on manual (lever) control . . . . . . . . . . . . . . . . .
WINTERIZATION KITS
Heater does not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower runs in START position; heater fails to ignite . . . . . . . . . . . . . . .
Heater starts, but fails to run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater runs continuously in high or low heat . . . . . . . . . . . . . . . . . . . .
Heater overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower does not stop when heater is shutoff . . . . . . . . . . . . . . . . . . . . .
Heater fails to start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel burning heaters fail to turn on . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel burning heaters overheat – overheat switch is good . . . . . . . . . . . .
Fuel burning heaters overheat – continue to bum . . . . . . . . . . . . . . . . .
Heater output too low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater smokes and bangs when starting. . . . . . . . . . . . . . . . . . . . . . . .
Blower will not stop after turn off. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odor of fuel in ventilating air (personnel heater only). . . . . . . . . . . . . . .
Blower runs but heater fails to ignite. . . . . . . . . . . . . . . . . . . . . . . . . .
Heater smokes during normal operation . . . . . . . . . . . . . . . . . . . . . . . .
WINCHES
Clutch will not engage drum (front and midship winches). . . . . . . . . . . .
Winch noisy under load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drum overruns cable or cable coils loosen when paying out cable
(front and midship tithes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winch (all types) does not hold load when power released. . . . . . . . . . . .
Winch (all types) leaks oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear winch operates atone speed only. . . . . . . . . . . . . . . . . . . . . . . . . .
2-23
2-25
2-25
2-25
2-26
2-26
2-26
2-26
2-27
2-27
2-27
2-28
2-28
2-28
2-28
2-28
2-28
2-29
2-29
2-29
2-29
2-29
2-29
2-30
2-30
2-30
2-30
2-30
2-30
2-31
2-31
2-31
2-31
2-32
2-32
2-32
2-32
79.
2-4
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