MMD Equipment 25S-3A3 - Manual (Page 60)

7. Maintenance/Adjustment
7-3
7.4 Troubleshooting
Should any trouble occur during operation, do not disregard the trouble. Investigate the
cause and take appropriate measures.
Read the manual carefully and fully understand what to do in case of trouble.
The more you understand about the construction and function of the unit, the faster you
can find a cause and solution to the problem.
This chapter describes the state, cause and countermeasures of major problems in
detail:
Symptom Cause Countermeasures
Starter does not
rotate. Low starter
revolution speed
even when starting. Malfunctioning battery Battery check→ Charge,
Change
Warning lamp for
over crank goes on. Fuel filter clogging
Filter clogging in fuel air-bleeding
electromagnetic pump
(SDG45S/60S/75S)
Malfunctioning fuel cut off solenoid
No diesel fuel oil
Air mixing in fuel pipings
Disassemble, clean, and
change
Change filter
Change solenoid
Check connector
Replenish fuel
Bleed air
Engine oil pressure
warning lamp turns
on. Engine oil shortage
Engine oil filter clogging
Malfunctioning oil pressure switch
Loosened or disconnected wiring, or
connector
Replenish oil
Change
Change
Check/fasten
Coolant
temperature
warning lamp turns
on. Radiator clogging.
Faulty thermostat
Faulty coolant temperature switch
Shortage of coolant
Slip of fan belt
Looseness, disconnection of wiring or
connectors
Clean
Change
Change
Replenish
Adjust tension
Check/fasten
Charge warning
lamp turns on. Alternator problem
Slipping fan belt
Looseness, disconnection of wiring or
connectors
Check/change
Fasten/change
Check/fasten