Symptom Tree t036-11
| Cause | Correction |
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Engine brake piston(s) is stuck |
Check the engine brake piston(s) for freedom of movement. Replace the engine brake piston(s) if necessary. Refer to Procedure 020-001. |
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Engine brake power supply connection is loose |
Check the engine brake power supply circuit. Check for blown fuses in the power supply wiring. Check the on/off switch for correct operation. Procedure 020-001 |
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Clutch switch is malfunctioning |
Check the clutch switch adjustment and the clutch switch circuit. Refer to the OEM service manual. |
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Engine brake throttle switch is malfunctioning |
Check the engine brake throttle switch (fuel pump switch). the OEM service manual |
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Service brake pressure switch or circuit is malfunctioning |
Check the service brake pressure switch and circuit. Refer to the OEM service manual. |
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|
Engine electrical ground is malfunctioning |
Check engine ground to chassis and chassis ground to battery negative (-) post. Refer to Procedure 013-009 and the OEM service manual. |
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Solenoid valve is malfunctioning |
Check for voltage at the solenoid valve. Procedure 013-009 and the OEM service manual |
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Solenoid valve filter screen is covered with debris |
Remove the solenoid valve and clean or replace the screen. Procedure 013-009 and the OEM service manual |
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Lubricating oil leak (internal) |
Check the engine brake hose connections, the engine brake housing, and the jumper tube o-rings for oil leaks. Procedure 013-009 and the OEM service manual |
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Engine brake lubricating oil supply line is restricted |
Remove the oil supply line. Inspect the supply line for a restriction. |
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Engine brake adjustment is not correct |
Adjust the engine brakes. Refer to Procedure 020-001. |
