Symptom Tree t037-011
| Cause | Correction |
|---|
|
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 toProcedure 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. |
|
|
Engine brake housing oil plug is missing or loose |
Check the outside of the brake housing for oil leaks and missing or loose plugs. Replace the plugs if necessary. |
|
|
Clutch switch is malfunctioning |
Check the clutch switch adjustment and the clutch switch circuit. Refer to the OEM service manual. |
|
|
Engine brake throttle switch is malfunctioning |
Check the engine brake throttle switch (fuel pump switch). the OEM service manual |
|
|
Engine brake adjustment is not correct |
Adjust the engine brakes. Refer to Procedure 020-001. |
|
|
Solenoid valve o-ring seals are leaking |
Remove the solenoid valve and inspect the top and bottom o-rings. Replace the o-rings if necessary. Procedure 020-001 |
|
|
Solenoid valve filter screen is covered with debris |
Remove the solenoid valve and clean or replace the screen. Procedure 020-001 |
|
|
Outer control valve spring is broken or control valve is sticking |
Inspect the outer control valve springs and control valve. Procedure 020-001 |
|
|
Master piston is stuck |
Check the master piston for freedom of movement. Replace the master piston if necessary Procedure 020-001. |
