Centinel System – Repair Manual – Engine Will Not Crank or Cranks Slowly (Electric Starter)

Battery voltage is low

Check the batteries and the unswitched battery supply circuit. Refer to Procedure 013-009 in this manual and Procedure 019-087 in the Troubleshooting and Repair Manual, CM870 Electronic Control System, Signature and ISX Engines, Bulletin 4021334, or Procedure 019-087 in the Troubleshooting and Repair Manual, Electronic Control System, Signature, ISX and QSX15 Engines, Bulletin 3666259, or Procedure 019-087 Troubleshooting and Repair Manual, Power Generation Control Systems QSX15, QSK23, QSK45, QSK60, QSK78, and QST30 Series Engines, Bulletin 4021419.

Battery cables or connections are loose, broken, or corroded (excessive resistance)

Check the battery cables and connections. Refer to Procedure 013-009.

Engine-driven units are engaged

Disengage engine-driven units.

Lubricating oil does not meet specifications for operating conditions

Change the oil and filters. Refer to Procedure 018-003 in the Operation and Maintenance Manual, Industrial and Power Generation, QSX15 Engines, Bulletin 3666423 or 018-003 in the Operation and Maintenance Manual, Signature and ISX Engines, Bulletin 3666251. Use the oil type recommended in Section V of the operation and maintenance manual.

Battery capacity is below specification

Refer to Procedure 018-021. Replace the batteries if necessary.

Batteries are cold

Check the battery heater. Refer to the manufacturer’s instructions.

Starting circuit component is malfunctioning

Check the starting circuit components. Refer to the OEM service manual.

Starting motor pinion or ring gear is damaged

Remove the starting motor, and inspect the gear. Refer to Procedure 013-020, 016-005, and the OEM service manual.

Crankshaft rotation is impaired

Check the crankshaft for ease of rotation. Refer to Procedure 001-016.

Hydraulic lock in a cylinder

Remove the injectors and rotate the crankshaft. Look for the source of fluid in the cylinder. Refer to Procedures 006-026 and 001-016.

Internal engine damage

Analyze the oil and inspect the filters to locate an area of probable damage. Refer to Procedure 018-003 in the Operation and Maintenance Manual, Industrial and Power Generation, QSX15 Engines, Bulletin 3666423 or 018-003 in the Operation and Maintenance Manual, Signature and ISX Engines, Bulletin 3666251. Remove the oil pan and inspect for damaged camshaft, cam followers, push rods, pistons and liners. Refer to Procedure 007-025.