Menzi Muck A91 - 9. Faults and Fault Rectification; 9.1 Engine Troubleshooting Guide

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Faults and fault rectification
Fault Cause Remedy
Engine turns over, but will
not start.
No fuel. Check fuel in tank.
Fuse 3A on alternator defective. Replace the fuse..
Exhaust blocked. Clear exhaust clogging.
Fuel filter clogged or full of water. Replace fuel filter or drain off water from the filter.
Fuel not reaching the injection pump or air in
the fuel system.
Check fuel flow at feed pump or bleed fuel system.
Injection pump or nozzles damaged. Have repair or replacement carried out by approved workshop.
Engine difficult to start or will
not start.
No fuel. Check fuel.
Hydraulic system runs up block. Switch off hydraulic consumers.
Air in fuel line. Vent fuel line.
Cold starter defective. Check pre-glow relay and coil.
Low starter motor speed. See „Starter motor is slow to turn over“.
Incorrect viscosity of engine oil used. Use the correct viscosity of oil.
Incorrect fuel type. Contact fuel supplier, use correct fuel type for operating condi-
tions.
Water, dirt or air in the fuel system. Drain, flush, fill and bleed system.
Fuel filter clogged. Replace filter insert.
Electronic fuel injection nozzles clogged or
damaged.
Have injection nozzles checked by approved workshop or engi-
ne dealer.
Problems with electronic fuel system. Contact the John Deere dealer or approved workshop.
Motor knocks. Engine oil level below minimum. Top up engine crankshaft oil.
Low coolant temperature. Remove thermostat and check.
Engine overheated. See „Engine overheats“.
Engine cold. Incorrect or defective thermostat. Remove thermostat and
check.
Engine runs erratically or
stalls frequently.
Low coolant temperature. Remove thermostat and check.
Fuel filter clogged. Replace fuel filter insert.
Water, dirt or air in the fuel system. Drain, flush, fill and bleed system.
Injection nozzles clogged or damaged. Have injection nozzles checked by approved workshop or engi-
ne dealer.
Problems with electronic fuel system. Contact the John Deere dealer or approved workshop.
Engine temperature below
normal.
Thermostat defective. Remove thermostat and check.
Temperature display or sensor defector. Check display, sensor and connections.
9. Faultsandfaultrectication
9.1 Trouble shooting on the engine