1451-040
UnclassifiedStarting
What This Code Means
Engine fails to start; Grinding noise when the engine is started; Broken or chipped teeth on the starting motor pinion or flywheel ring gear; Wear patterns on the teeth of the starting motor pinion or flywheel ring gear
Possible Causes
- •Damaged teeth on starting motor pinion or flywheel ring gear
- •Damaged teeth on the starting motor pinion and flywheel ring gear
- •Dirty or loose electrical connections
- •Irregular engagement
- •Irregular engagement of pinion and ring gear
- •Irregular engagement of the starting motor pinion and flywheel ring gear
- •Mechanical wear, chipping, or broken teeth on starting motor pinion or flywheel ring gear
- •Starting motor fails
- •Starting motor failure
- •Starting motor pinion does not engage the flywheel ring gear
Suggested Actions
- 1Check and clean the electrical connections
- 2Check starting motor for proper operation
- 3Inspect air starting motor pinion teeth and flywheel ring gear
- 4Inspect the starting motor
- 5Inspect the starting motor for proper operation
- 6Inspect the teeth of the starting motor pinion and the flywheel ring gear
- 7Inspect the teeth of the starting motor pinion and the flywheel ring gear for wear, breaks, or chips
- 8Inspect the teeth of the starting motor pinion and the flywheel ring gear for wear, broken, or chipped teeth
- 9Listen for grinding when the engine is started
- 10Perform scheduled inspection of the starting motor
- 11Replace the starting motor pinion and the flywheel ring gear if damaged teeth are found
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for 1451-040 on your specific Caterpillar unit — cited to the OEM manual, not a forum guess.
GET THE ANSWER
Free account required — we'll bring your question with you.