Symptom Tree  t007   Printable Version This is symptom tree t007 Cause Correction Lubricating oil drain interval is excessive Verify the correct lubricating oil drain interval. Refer…

Symptom Tree  t006   Printable Version This is symptom tree t006 Cause Correction Carbon buildup is excessive in the air discharge line, check valve, or cylinder head…

Symptom Tree  t005   Printable Version This is symptom tree t005 Cause Correction Air system leaks Block the vehicle wheels and check the air system for leaks…

Symptom Tree  t004   Printable Version This is symptom tree t004 Cause Correction Air intake system restriction to air compressor is excessive Replace the air compressor air…

Table of Contents General Information General Information TOC Use the charts on the following pages of this section to aid in diagnosing specific engine symptoms.…

Table of Contents General Information General Information TOC A thorough analysis of the customer’s complaint is the key to successful troubleshooting. The more information known…

Table of Contents General Information   Engine Dynamometer Run-in In Service Run-in Cummins Heavy Duty Engine Operating Curve Definitions Fuel Flow Measurement on Engine or…

Table of Contents General Information General Information TOC The basic heavy-duty electrical system consists of: Batteries (1) (usually three or four connected in parallel). A…

Table of Contents Flow Diagram   Holset® Models Cummins Flow Diagram TOC Holset® Models SMALL | MEDIUM | LARGE Air governor signal Air Lubricant Coolant. Cummins SMALL | MEDIUM | LARGE Coolant Air…

Table of Contents General Information General Information TOC The compressed air system normally consists of a gear-driven air compressor, an air governor, air tanks and…