Table of Contents Clean Clean TOC  WARNING  When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. Hot…

Vibration Excessive   Printable Version Symptoms Vibration excessive Cab noise due to vibration How To Use This Tree This symptom tree can be used to troubleshoot…

Symptom Tree  t127   Printable Version This is symptom tree Cause Correction Air in the fuel system Check for air in the fuel system. Refer to Procedure…

Symptom Tree  t126   Printable Version This is symptom tree Cause Correction Lower throttle lever is not locked wide open Make sure the lower throttle lever linkage…

Symptom Tree  t125   Printable Version This is symptom tree Cause Correction Variable speed (VS) speed adjusting screw has missing or damaged washers Remove the jam nuts…

Symptom Tree  t122   Printable Version This is symptom tree Cause Correction Engine is operating for extended periods under light or no-load conditions (slobbering) Review the engine…

Symptom Tree  t120   Printable Version This is symptom tree Cause Correction STC system malfunction Check the electrical STC oil control valve and circuit. Refer to Procedure…

Symptom Tree  t118-011   Printable Version This is symptom tree Cause Correction Engine block heater is malfunctioning (if equipped) Check the electrical sources and wiring to the…

Symptom Tree  t118-155   Printable Version This is symptom tree Cause Correction Electronic fault codes active or high counts of inactive fault codes Refer to Section TF…

Symptom Tree  t116-011   Printable Version This is symptom tree Cause Correction Intake manifold pressure (boost) is below specification Refer to the Intake Manifold Pressure (Boost) is…