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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. 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
37100 B
Section 5 - Troubleshooting
Table 4 - 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
MDG20IF4-MLG20IF4 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.
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