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
26. ALTERNATOR CHARGING RATE HIGH
Loose Connections Tighten connections to alternator and regulator.
Defective Regulator Replace regulator.
27. ALTERNATOR NOISY
Defective Drive Belt Replace belt.
Misaligned Belt or Pulley Align drive pulley, alternator pulley and belt.
Loose Pulley Tighten pulley nut. If keyway is worn, install a new pulley.
Worn Bearings Replace bearings.
Shorted Rectifiers in Alternator Replace diode assembly.*
Armature or Rotor Shaft Bent Replace component.*
*Authorized dealers are equipped with the necessary tools and personnel familiar with disassembly and assembly
procedures to perform these serviced.
28. STALLS AT LOW SPEED
Idle Speed Too Low See your authorized dealer.
Low Fuel Supply Preassure Check fuel supply line for leaks or kinks, air in fuel system,sticking,
binding, or defective fuel bypass valve. Replace fuel filter. Check fuel
pressure. Fuel transfer pump should supply fuel at 20 to 30 PSI to
the engine when the engine is fully loaded.
Defective Fuel Nozzle Replace nozzle.
Defective or Damaged Fuel Replace damaged or defective parts.
Injection Pumps
High Parasitic Loads Check for excessive loading due to auxiliary attachments.
Page A-23
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