Operator`s manual

G 25 Maintenance
wc_tx001046gb.fm 79
7.8 Troubleshooting Automatic Shutdown
There are six automatic shutdown conditions:
• low oil pressure
• high coolant temperature
• engine overspeed
• engine underspeed
• engine overcrank
• low fuel level
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 Neuson dealer for possible causes
of generator problems.
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
7.8.1 Check engine oil level using dipstick. Add oil if required.
7.8.2 Carefully inspect engine for oil leaks.
7.8.3 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 continuity between sender and engine control
module. See wiring diagrams.
7.8.4 If oil level, oil pressure sender, and connecting wiring are good, the
fault could be caused by an engine failure.
Note: An engine failure caused by something other than one of the six
shutdown conditions discussed will cause a low oil fault condition to be
displayed.
High Coolant Temperature Shutdown
7.8.5 Restart engine and read water temperature. Stop engine if
temperature is above 105°C (221°F). Normal engine operating
temperature is between 77°–88°C (170°–190°F).
7.8.6 Allow engine to cool to a safe temperature and inspect coolant level in
radiator. Add coolant as needed.
7.8.7 Carefully inspect coolant hoses and engine block for leaks.
WARNING