3176C and 3196 Marine Engines Caterpillar

Removal Procedure

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Illustration 1	g00518483

1. Remove bolt (1) and the washer from clip (3) .

2. Disconnect speed/timing sensor connector (2) .

3. Remove speed/timing sensor (3) .

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Illustration 2	g00518484

4. Remove O-ring seal (5) from speed/timing sensor (4) .

5. Extend slip head (6) for the installation procedure.

Installation Procedure

1. Inspect the condition of the O-ring seal. Replace the seal, if necessary.

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NOTICE
The No. 1 piston must be at either top center of the compression stroke or top center of the exhaust stroke. After sensor installation the electronic timing must be recalibrated.

Note: Refer to the Troubleshooting Manual, "Engine Speed/Timing Sensor Calibration".

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Illustration 3	g00518484

2. Install O-ring (5) and extend slip head (6) .

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Illustration 4	g00518485

Note: Ensure that the top of a gear tooth is visible through the speed/timing sensor opening in the front housing prior to installation. See Illustration 4.

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Illustration 5	g00518483

3. Install speed/timing sensor (4). Tighten the sensor to a torque of 40 ± 5 N·m (30 ± 4 lb ft).

4. Connect speed/timing sensor connector (2) .

5. Install clip (3) with bolt (1) and the washer.

6. Recalibrate the timing.