• Failure to use recommended fuel, lubricants, and
coolant/antifreeze
i09996230
Speed Sensor - Clean/Inspect
When the engine is cranked, small metal particles
are produced. These particles will contaminate the
magnetic end of the crankshaft position sensor.
Contamination will distort the signals that are
produced by the sensor. The sensor should be
regularly cleaned and adjusted to ensure a good
signal.
Table 11
Required Tools
Tool Part Number Part Name
Qty
A SE253
Crankshaft Turning Tool
1
Speed Sensor
1. Isolate the electrical supply to the engine.
Illustration 102 g07698725
Typical example
2. Disconnect connector (1) from harness (2).
Remove sensor (3) from flywheel housing (5).
3. Use a soft, dry cloth to clean any debris from the
sensor (3).
Note: Do not use a wire brush to clean the sensor.
Do not use abrasive material to clean the sensor.
Illustration 103 g07698771
Typical example
4. Install Tooling (A). Use Tooling (A) to rotate the
engine. Rotate the engine to align a tooth on the
ring gear (6) with the center of the tapped hole.
5. By hand, carefully install the sensor (3) until light
contact is made with the ring gear tooth.
Note: Do not tighten the sensor.
6. Unscrew the sensor (3) by one complete turn to
obtain a clearance (X) of 0.5 mm to 0.8 mm
(0.02 inch to 0.03 inch).
7. Tighten locknut (4) to a torque of 25 N·m
(221 lb in). Do not allow rotation of the sensor (3).
8. Remove tooling (A) and connect connection (1) to
the harness (2). Restore electrical power to the
engine.
i07395731
Starting Motor - Inspect
Perkins recommends a scheduled inspection of the
starting motor. If the starting motor fails, the engine
may not start in an emergency situation.
M0163009 97
Maintenance Section
Speed Sensor - Clean/Inspect
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