Komatsu WA470-5H Operation & Maintenance Manual page 194

TROUBLESHOOTING
Abnormal noise generated (com-
bustion or mechanical)
3-138
•Low grade fuel being used
•Overheating
•Damage inside muffler
•Excessive valve clearance
OPERATION
•Change to specified fuel
•Refer to "Water temperature
gauge is in red range" as above
(•Replace muffler)
(•Adjust valve clearance)