Series 638 – Section 15.5 Starter Motor or Starter Solenoid Inoperative

Section 15.5
Starter Motor or Starter Solenoid Inoperative

To determine if an inoperative starter motor or starter solenoid is causing the engine to crank slowly or not crank, perform the following steps:‪

1. Remove the starter motor. Refer to "8.3.1 Removal of Starter" .
2. Test the starter motor for proper operation.
   1. If the starter motor is inoperative, replace the starter motor. Refer to "15.5.1 Replacement of Starter Motor" .
   2. If the starter motor is operative, call the Detroit Diesel technical service group.

Section 15.5.1
Replacement of Starter Motor

Replace the starter motor as follows:‪

1. Install a new starter motor. Refer to "8.3.2 Installation of Starter" .
2. Verify replacement. Refer to "15.4.2.1 Test of Engine with Replaced Components" .

Section 15.5.1.1
Test of Engine with Replaced Starter

Perform the following to determine if the replaced starter resolved the fault:‪

1. Attempt to start and run the engine.
   1. If the engine failed to start and run, call the Detroit Diesel technical service group.
   2. If the engine started and ran, no further troubleshooting is required.