Troubleshooting Symptom Problem Solution Engine runs irregularly or stalls Low coolant temperature. Remove and check thermostat. frequently Clogged fuel filter. Replace fuel filter element. Water, dirt, or air in fuel system. Drain, flush, fill, and bleed system. Dirty or faulty injection nozzles. Have authorized servicing dealer or engine distributor check injectors. Electronic fuel system problem See your John Deere distributor or servicing dealer. Below normal engine Defective thermostat. Remove and check thermostat. temperature Defective temperature gauge or Check gauge, sender, and sender. connections. Continued on next page RG,RG34710,5608 –19–28MAR03–3/8 45-12 021604 PN=206