GROUND FORCE 717H01, Operation & Maintenance Manual, Page: 42 / 57

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WATER TRUCK TROUBLESHOOTING
PROBLEM CAUSES SOLUTIONS
ELECTRICAL
Blo
wn fuses
Tripped cir
cuit break
er
Incorrect size. Check the schematic and the manufacturer's recom-
mendations to verify the correct size was installed in the
circuit. Replace fuses with the correct size only.
CAUTION
Fire or damage to wiring may occur if the wrong size is used.
Short in the circuit. Identify the component the circuit is protecting. Examine
the wires and connections for a pinched or grounded wire
and repair as needed. Check for a failed component such
as a coil, light, charger, motor, etc. Replace the component
as needed. Replace the fuse or circuit breaker.
Recent additions to the
electrical circuit
(such as fire suppression).
Adding power draws to a circuit will cause fuses or cir-
cuit breaker to burn out or trip. Remove the newly added
circuit and place it on its own circuit, with its own fuse or
circuit breaker and power source.
Hoist v
alv
e coils are
burning out.
Current/voltage to the coil is too
high.
Check the voltage to the hoist coil with the coil still con-
nected. Check voltage across both the positive and nega-
tive terminals of the coil. The voltage should be between
9.5 and 12 volts at the hoist valve coil. If the voltage is dif-
ferent, call Ground Force at 1-208-664-9291 and request
to speak with the Technical Communicator.
The coil is incorrect. Replace the coil with the recommended OEM coil.
Electrical feedback to micro. Add a diode to the coil to remove voltage feedback.
GETTING STARTED
Do you have copies of the
electrical & hydraulic schematics?
Check manual or call Ground Force for copies of schematics.
To help you trouble shoot your
Ground Force equipment, the
Service Department will need
to know your equipment’s serial
number. The Ground Force serial
number may be located:
At the front head of the tank
On a yellow tag inside the power panel
In the front of the Operation & Maintenance Manual
On a yellow tag on the driver’s side of the truck
42
TROUBLESHOOTING