Maintenance G 50/G 70/G 85
wc_tx000484gb.fm 52
4.8 Troubleshooting Automatic Shutdown
There are several automatic shutdown conditions: low oil pressure,
high coolant temperature, engine overspeed, engine underspeed,
engine overcrank, and low fuel. When these occur, the operator can
perform certain diagnostic tests to help identify the problem. Most of
these diagnostics deal with the engine.
The generator, however, can also cause problems. Consult a qualified
electrician or your nearest WACKER Dealer for possible causes of
generator problems. For SPN.FMI Diagnostic Codes, contact
WACKER or John Deere service departments.
Anytime the generator is down for service, secure it by closing and
locking all doors, and hang a "DO NOT RUN" sign on the metering
panel.
Low Oil Pressure Shutdown
4.8.1 Check engine oil level using dipstick. Add oil if required.
4.8.2 Carefully inspect engine for oil leaks.
4.8.3 If oil level is good, start engine and verify loss of oil pressure. Shut
down engine immediately if oil pressure value does not read at least
15 psi within 5 seconds.
Check the oil pressure shutdown sender and connecting wiring on the
engine block. Check for Diagnostic Trouble Codes.
4.8.4 If oil level, oil pressure sender and connecting wiring are good, the fault
could be caused by an engine failure.
High Coolant Temperature Shutdown
4.8.1 Restart engine and read water temperature. Stop engine if
temperature is above 226°F. Normal engine operating temperature is
between 170°-190° F.
4.8.2 Allow engine to cool to a safe temperature and inspect coolant level in
radiator. Add coolant as needed.
4.8.3 Carefully inspect coolant hoses and engine block for leaks.
4.8.4 Check that fan belt for water pump is tight.
4.8.5 Check the high temperature shutdown sender and connecting wiring
on engine block. Check for Diagnostic Trouble Codes.
4.8.6 If sender and wiring are good, consult engine manufacturer’s
Operator’s Manual or Service Manual for possible causes of engine
overheating.
WARNING
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