Table of Contents
Advertisement
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 engine
operator's manual for additional troubleshooting information or contact Generac Mobile Products Technical Service
at 1-800-926-9768. Procedures that require in-depth knowledge or skills should be referred to a trained technician.
Problem
Low Oil Pressure Shut-
down
High Coolant Tempera-
ture Shutdown
Overcrank Shutdown
Overspeed or Under-
speed Shutdown
10454 O
Section 5 - Troubleshooting
Table 1 - General Troubleshooting Guide
Possible Cause
Low oil level
Oil leaking from engine
Oil pressure sender
Low coolant level
Blockage in radiator
Leakage in coolant hoses,
engine block, or water
pump
Fuel level low
Frequency setting incorrect
MLT4060-80M/K Operating Manual
Solution
Check oil level on dipstick. Add oil, if needed.
Visually inspect the engine for leaks. Restart unit and verify loss of
pressure. Shut down immediately if pressure does not reach 5 psi
(34 kPa) within five seconds.
Refer to engine operator's manual to identify corrective action.
Add coolant if needed. Allow engine to cool, then check coolant
level in radiator. Restart engine and check coolant temperature
(on controller). Stop engine immediately if coolant temperature is
210°F (99°C) or more.
Check radiator shroud and ducting for blockage and remove any
foreign matter.
Inspect for visible leaks. Check tension of water pump serpentine
drive belt.
Remove load on generator and restart engine. Check coolant
temperature and shut engine down immediately if it starts to over-
heat. Refer to the engine operator's manual for additional informa-
tion on engine overheating.
Check fuel level in tank.
Check fuel pump operation.
Check air filter for blockage.
Refer to engine operator's manual for additional information.
Disconnect all loads and restart unit. Read frequency (Hz) in the
LCD window on controller. Frequency should read 60 Hz.
If frequency is above 60 Hz, engine speed will need to be
adjusted. Refer to the engine operator's manual for throttle adjust-
ment information.
33
Advertisement
Table of Contents
Troubleshooting
