roubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Section TS - Troubleshooting Symptoms
Engine Noise Excessive
This is symptom tree T047.
Check the belt tension and tighten if neces-
Fan drive belt is loose
sary. Refer to Procedure 008-087.
Check the fan. Refer to the OEM service
an is loose, damaged, or not balanced
Inspect the air intake and exhaust systems for
ir intake or exhaust leaks
air leaks. Refer to Procedure 010-024.
Inspect the air piping, chassis, and cab for
ir intake or exhaust piping is contacting the
contact points. Refer to the OEM service
chassis or cab
ubricating oil level is above or below specifi-
Check the oil level. Add or drain oil, if neces-
sary. Refer to Procedure 007-025.
Refer to the Operation and Mainteance
Manual, B Series Engines, Bulletin No.
ubricating oil is thin or diluted
3810205 for oil specifications. If the oil pres-
sure is low, refer to the Lubricating Oil Pres-
sure Low symptom tree .
Check the oil pressure. Refer to Procedure
ubricating oil pressure is below specification
007-052. If the pressure is low, refer to the
Lubricating Oil Pressure Low symptom tree.
Inspect the vibration damper. Refer to Proce-
ibration damper is damaged