Operation and maintenance manual

Troubleshooting Symptoms Charts B3.9, B4.5, B5.9 Industrial
Page TS-24 Section TS - Troubleshooting Symptoms
Engine Noise Excessive
Cause Correction
STEP 1
Fan drive belt is loose, tight, or not in alignment
.............
Check the fan drive belt. Refer to Procedure
103-002 (Drive Belts) in Section 3.
OK
Go To Next Step
STEP 2
Lubricating oil is thin or diluted
.............
Refer to Procedure 018-003 (Lubricating Oil
Recommendations and Specifications) in Section
V.
OK
Go To Next Step
STEP 3
Vibration damper is damaged
.............
Inspect the vibration damper. Refer to Procedure
001-051 (Vibration Damper - Rubber) or
Procedure 001-052 (Vibration Damper - Viscous)
in Section 7.
OK
Go To Next Step
STEP 4
Air intake or exhaust leaks
.............
Check for loose or damaged piping connections
and missing pipe plugs. Check the turbocharger
and exhaust manifold mounting. Refer to
Procedure 010-058 (Air Intake Piping) in Section 3.
OK
Go To Next Step
STEP 5
Air intake or exhaust piping is contacting the
chassis or cab
.............
Inspect the air piping, chassis, and cab for contact
points. Refer to the OEM service manual.
OK
Go To Next Step
STEP 6
Air intake system restriction is above specification
.............
Check the air intake system for restriction. Clean
or replace the air filter and inlet piping as
necessary. Refer to Procedure 010-059 (Air
Cleaner Restriction) in Section 4.
OK
Go To Next Step
STEP 7
Coolant temperature is above specification
.............
Refer to the Coolant Temperature is Above Normal
- Sudden Overheat or the Coolant Temperature is
Above Normal - Gradual Overheat symptom tree.
OK
Go To Next Step
STEP 8
Engine mounts are worn, damaged, or not correct
.............
Check the engine mounts. Refer to the OEM
service manual.
OK
Go To Next Step