Symptom Tree     Printable Version Bulk oil supply is contaminated Check the bulk oil supply. Drain the oil and replace with noncontaminated oil. Replace the oil…

Symptom Tree     Printable Version Bulk coolant supply is contaminated Check the bulk coolant supply. Drain the coolant and replace with noncontaminated coolant. Replace the coolant…

Symptom Tree     Printable Version Verify the complaint If low power is relevant, refer to a Cummins Authorized Repair Location. If acceleration is poor, refer to…

Symptom Tree     Printable Version Fuel shutoff valve (FSOV) is stuck open Verify that the solenoid or coil is not being energized by a short in…

Symptom Tree     Printable Version Load is excessive for engine horsepower rating Reduce the load on the engine. Refer to the OEM service manual.   Tachometer…

Symptom Tree     Printable Version Engine-driven units are engaged Disengage engine-driven units.   Battery cables are not the correct gauge or length Replace the battery cables…

Symptom Tree     Printable Version Air pressure is low in the air tanks Increase air pressure with an external air source. Refer to the OEM service…

Symptom Tree     Printable Version Engine is misfiring Refer to the Engine Runs Rough or Misfires symptom tree.   Engine idle speed is set too low…

Symptom Tree     Printable Version Idle shutdown or PTO shutdown features are activated Check the time limit on idle and PTO shutdowns with an electronic service…

Symptom Tree     Printable Version Electronic fault codes are active For instructions on how to read active fault codes, refer to Procedure 101-007 (Electronic Controlled Fuel…