Owner’s Manual for Mobile Light Tower 25
Section 5: Troubleshooting
General Troubleshooting
Some of the more common problems are listed in the
table below. This information is intended to be a check or
verification that simple causes can be located and fixed.
It does not cover all types of problems. Refer to the OEM
engine operator’s manual for additional troubleshooting
information. Procedures that require in-depth knowledge
or skills should be referred to a GMASD.
If problems persist, contact Generac Mobile at 1-800-926-9768 for assistance.
(000139)
WARNING
Risk of burns. Allow engine to cool before
draining oil or coolant. Failure to do so could
result in death or serious injury.
General Troubleshooting Guide
Problem Possible Cause Solution
Low oil pressure
shutdown
Low oil level Verify oil level on dipstick. Add oil, if needed.
Oil leaking from engine Visually inspect the engine for leaks.
Oil pressure switch failure Refer to OEM engine operator’s manual to identify corrective
action.
High coolant
temperature shutdown
Low coolant level Add coolant if needed. Allow engine to cool, then check coolant
level in radiator. Restart engine and check coolant temperature.
Stop engine immediately if coolant temperature is 210°F (99°C)
or more.
Blockage in radiator Inspect radiator shroud and ducting for blockage and remove
any foreign matter.
Leakage in coolant hoses,
engine block, or water
pump
Inspect for visible leaks. Verify tension of water pump serpentine
drive belt.
Remove load on generator and restart engine. Verify coolant
temperature and shut engine down immediately if it starts to
overheat. Refer to the OEM engine operator’s manual for
additional information on engine overheating.
Unit cranks but does not
start
Fuel level low Check fuel level in tank.
Verify fuel pump operation.
Restricted air filter Inspect air filter for blockage.
Refer to OEM engine operator’s manual for additional
information.
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