TM 5-3895-367-14&P
Section III. UNIT TROUBLESHOOTING PROCEDURES
4-7. GENERAL.
Table 4-2 lists the common malfunctions that you may
find during the operation or maintenance of the spreader
or its components. You should perform the
test/inspections and corrective actions in the order listed.
This section cannot list all malfunctions that may occur,
nor all tests or inspections and corrective actions. If a
malfunction is not listed, or Is not corrected by the listed
corrective actions, notify your supervisor.
4-8. EXPLANATION OF COLUMNS.
a.
Malfunction. A visual or operational indication
that something is wrong with the spreader.
b.
Test or Inspection. A procedure to isolate the
problem in a component or system.
c.
Corrective Action. A procedure to correct the
problem.
4-9. SYMPTOM INDEX.
Troubleshooting
Procedure Page
ELECTRICAL SYSTEM
All lights do not light ...............................................4-4
One or more (but not all) lights fail to light .............4-5
Dim or flickering lights............................................4-6
PINTLES AND TOWING ATTACHMENTS
Coupler hitch will not lock onto truck hitch .............4-7
Coupler hitch will not adjust ...................................4-7
Coupler hitch will not latch or release ....................4-7
HOPPERS, GATES, AND CHUTES
Gate will not open, close, or adjust ........................4-7
VANE OR SCREW FEEDERS OR CONVEYORS
Agitator will not rotate.............................................4-7
FEEDING OR CONVEYOR SHAFT
Feed roll will not rotate........................................... 4-8
Table 4-2. UNIT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ALL LIGHTS DO NOT LIGHT.
Step 1. Check wiring harness for loose connections
and broken wiring.
Tighten
loose
connections.
Replace or repair wiring harness
(para 4-17).
Step 2. Check wiring harness for bare spot causing
short circuit.
Replace or repair wiring harness
(para 4-17).
Step 3. Verify power coming from towing vehicle as
follows:
a. Set multimeter to 50 vdc range.
b. Connect multimeter red lead to
towing vehicle connector pin B.
Connect black lead to ground.
c. Apply power as appropriate
(turn on light switch, apply
brakes).
If multimeter does not indicate
approximately
24
vdc,
troubleshoot
towing
vehicle
(refer to appropriate technical
manual for towing vehicle).
If
multimeter
indicates
approximately 24 vdc, check
towing vehicle connector pins
D, E, and J. If multimeter
indicates approximately 24 vdc
for each pin, continue with this
troubleshooting procedure.
4-4
