N14 Base Engine Troubleshooting and Repair Manual – Engine Brake – Low Retarding Power or Slow to Activate (CELECT™ or CELECT™ Plus)

Symptom Tree  t037-155

This is symptom tree t037-155
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the Troubleshooting and Repair Manual for CELECT™ Plus Systems, Bulletin 3666130, or Section TF in the Troubleshooting and Repair Manual for CELECT™ Systems, Bulletin 3666084.

 

Engine is cold

Allow the engine to warm to operating temperature. If the engine will not reach operating temperature, refer to the Coolant Temperature Below Normal symptom tree.

 

Lubricating oil pressure is below specification

Check the oil pressure. If the pressure is low, refer to Procedure 007-028.

 

Air in the lubricating oil system

Check the oil level. If level is high, check for a cracked suction tube. Refer to Procedure 007-025.

 

Lubricating oil leak (internal)

Check the engine brake hose connections, the engine brake housing, and the jumper tube o-rings for oil leaks. Procedure 007-025

 

Engine brake lubricating oil supply line is restricted

Remove the oil supply line. Inspect the supply line for a restriction.

 

Engine brake adjustment is not correct

Adjust the engine brakes. Refer to Procedure 020-001.

 

Engine brake harness connectors are loose or broken

Check the engine brake harness connectors. Check the engine brake harness for continuity. Refer to the wiring diagrams in the Troubleshooting and Repair Manual for CELECT™ Plus Systems, Bulletin 3666130, or Troubleshooting and Repair Manual for CELECT™ Systems, Bulletin 3666084.

 

Master piston is stuck

Check the master piston for freedom of movement. Replace the master piston if necessaryRefer to the wiring diagrams in the Troubleshooting and Repair Manual for CELECT™ Plus Systems, Bulletin 3666130, or Troubleshooting and Repair Manual for CELECT™ Systems, Bulletin 3666084..

 

Engine brake solenoid valve has a leaking center o-ring seal

Remove the solenoid valves and replace the center o-rings if necessary.

 
Last Modified:  29-Mar-2005