VIPER DIESEL
SECTION 6: TROUBLESHOOTING
090058-OP_r0 (AUGUST-2014)
PAGE - 25
VANAIR MANUFACTURING, INC.
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ENGINE (CONTINUED)
Improper Control Operation:
Engine does not speed up
(continued)
Fuel filter partly plugged
Replace fuel filter. Refer the Engine
Operator’s Manual.
Auxiliary fuel pump may be needed for
remote fuel tank.
Improper Control Operation:
Engine does not slow down
Speed control actuator stuck
Lubricate; replace speed control actuator if
necessary.
Engine speed control lever stuck
Free lever and lubricate if necessary. Refer
to Engine Operator’s Manual.
Faulty pressure tranducers
Check and replace, if necessary.
Engine stops during operation
Fault:
Engine High Temp Shutdown
Located too close to obstruction
Move further from obstruction.
Engine radiator plugged
Clear debris/dirt from engine radiator.
Fault with engine cooling system
Consult Engine Operator’s Manual.
Ambient temperature too high
Consult
Section 6.3.3, High Temperature
Operation
.
Faulty temperature switch
Replace.
Engine stops during operation
Fault:
Low Engine Oil Pressure
Low oil level
Check engine oil level; replenish as
necessary. Consult the Engine Operator’s
Manual for additional information on engine
maintenance.
Engine shutdown switch activated
Confirm that access door is properly in
place. Replace faulty engine shutdown
switch.
Faulty oil pressure switch
Replace.
Engine oil filter plugged
Replace engine oil filter. Refer to the Engine
Operator’s Manual.
Gradual loss of engine power
Contaminated fuel
Drain and replace fuel supply.
Engine air filter contaminated
Check air filter. Replace if necessary (refer
to the Engine Operator’s Manual).
Fuel filter(s) contaminated
Check fuel filters. Refer to the Engine
Operator’s Manual for additional information
on engine maintenance.
Low fuel level
Add fuel.
Overload
Reduce load; check load use, and reduce
Continued on next page
6.2 TROUBLESHOOTING GUIDE
Fault/Malfunction
Possible Cause
Corrective Action
