7032 SOUTH 196th - KENT, WA 98032 - (253) 872-0141 / FAX (253) 872-8710
OPERATION / MAINTENANCE MANUAL
MODEL 50 VIBRATORY HAMMER WITH MODEL 260 POWER UNIT
- APPENDIX A -
CUMMINS 6CT8.3 ENGINE
A-3. Engine Troubleshooting (Continued...)
Possible Causes Remedy
6. HEAVY COMBUSTION KNOCK
Air in Fuel System Bleed air from system.
Defective Fuel Injection Pump Plunger Replace.*
and Barrel Assembly
Defective Fuel Injection Nozzle Replace.
Incorrect Fuel Injection Timing See your authorized dealer.*
7. VALVE TRAIN CLICKING NOISE
Excessive Valve Lash Set to specified clearance.
Broken Valve Spring(s) Replace valve spring(s) and all other damaged components.*
Insufficient Lubrication Check lubrication in valve compartment. Should be very wet at all speeds.
Oil passages should be cleaned, especially those leading to the cylinder
head.
8. OIL IN COOLANT
Failed Oil Cooler Core Replace oil cooler core.
Failed Head or Spacer Plate Gaskets Replace head and spacer plate gaskets.
Cracked or Defective Cylinder Block Replace cylinder block.*
Cracked or Defective Head Replace cylinder head.
9. MECHANICAL KNOCK
Engine Connecting Rod Bearing Replace the bearing. Check the connecting rod and
Failure crankshaft. Replace if necessary.*
Main Bearing Failure Replace bearings.*
Damaged Timing Gear Train Replace components as necessary.*
Broken Crankshaft Replace crankshaft.*
Fuel Dilution of Crankcase Oil Correct fuel leakage into crankcase oil.
*Authorized dealers are equipped with the necessary tools and personnel familiar with disassembly procedures to
perform these services.
Page A-17
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