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SERIES 638 ENGINE SPEED SENSOR

The Engine Speed Sensor is an electronic component which sends a signal to the ECM and is mounted to the right side of the flywheel housing. See Figure 27800 . ‪

1.Engine Speed Sensor ‪

Engine Speed Sensor Location

Replacement of Engine Speed Sensor

To determine if replacement of the engine speed sensor is necessary, perform the following procedure. See Figure 28570 . ‪

Note: The engine speed sensor is a non-serviceable component and is replaced as a unit. No adjustment is required.

Flowchart for Replacement of Engine Speed Sensor

Removal of Engine Speed Sensor

Remove the engine speed sensor as follows: ‪

  1. Disconnect the engine speed sensor electrical harness connector from the engine speed sensor. See Figure 27800 .

    1.Engine Speed Sensor ‪

    Engine Speed Sensor Harness Removal

  2. Remove mounting bolt.
  3. Remove engine speed sensor from flywheel housing.
Inspection of Engine Speed Sensor

Inspect engine speed sensor as follows: ‪

  1. Visually inspect the engine speed sensor for damage.
    1. If damage is found, replace the engine speed sensor. Refer to section .
    2. If no damage is found, reuse the engine speed sensor. Refer to section .

Installation of Engine Speed Sensor

Install engine speed sensor as follows: ‪

  1. Install the engine speed sensor to the flywheel housing with the retaining bolt.
  2. Connect the engine speed sensor electrical harness.
  3. Run the engine to verify repair.