Cummins N14 STC, Celect, Celect Plus – Service 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 019-087 in the Troubleshooting and Repair Manual CELECT Plus™ Systems, Bulletin 3666130, or Procedure 019-087 in Section 19 in Troubleshooting and Repair Manual CELECT™ Systems, Bulletin 3666084 and the OEM service manual.

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

Check the battery cables and connections. Refer to the OEM service manual.

Engine-driven units are engaged

Disengage engine-driven units.

Lubricating oil temperature is below specification

Install an oil pan heater, or drain the oil and fill the system with warm oil.

Lubricating oil does not meet specifications for operating conditions

Change the oil and filters. Refer to Procedure 007-013 in Section 7.

Crankshaft rotation is impaired

Check the crankshaft for ease of rotation. Refer to Procedure 001-016 in Section 1.

Battery capacity is below specification

Refer to the OEM service manual. Replace the batteries, if necessary.

Batteries are cold

Check the battery heater. Refer to the OEM service manual.

Battery cables are not the correct gauge or length

Replace the battery cables with larger gauge or shorter length cables. Refer to Procedure 018-020 in Section V.

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 in Section 13 and the OEM service manual.

Hot stall (hot start) in engine

Engine is hot and experiencing vapor lock. Refer to the OEM service manual.

Hydraulic lock in a cylinder

Remove the injectors and rotate the crankshaft. Look for the source of fluid in the cylinder. Refer to Procedure 006-026 in Section 6 and Procedure 001-016 in Section 1.

Internal engine damage

Analyze the oil and inspect the filters to locate an area of probable damage. Inspect for damaged crankshaft, pistons, and liners. Refer to Procedure 007-083 in Section 7.