2002/03/01 Caterpillar

Industrial Engines:

C-9 (S/N: CLJ1-UP)

Reference: Operation and Maintenance Manual, SEBU7502, "Engine Oil and Filter - Replace".

The oil grade plugs are connected to the engine wiring harness. The oil grade plugs are used to inform the Electronic Control Module of the grade of oil that is being used in the engine. The oil grade plugs are used on the C-9 Industrial engine to enhance starting in cold weather conditions. When changing oil grades, the operator must ensure that the corresponding plug is inserted into the wiring harness. The oil grade plugs can be recognized by either the identification tags or by the color of the wires. For the location of the oil grade plug, refer to Operation and Maintenance Manual , "Sensor and Electrical Components".

Illustration 1	g00852969
Illustration 1 shows the oil grade plugs that are shipped with the engine. (1) Identification tag for 10W30 oil grade plug (Green wire) (2) Identification tag for 15W40 oil grade plug (Red wire)

Illustration 2	g00852892
Illustration 2 shows the available oil grade plug Repair kit 214-7170 214-7170 Repair Kit (3) 10W30 oil grade plug (Green wire) (4) 15W40 oil grade plug (Red wire) (5) 0W20 oil grade plug (Black wire)

10W30 and 15W40 oil grade plugs are shipped with the engine. The 0W20 oil grade plug can be ordered from the parts manual. Order the 214-7170 Repair Kit. The 0W20 oil grade plug can be made from a 175-3700 Connector Repair Kit. Refer to the Electrical Schematic or Table 1 for the proper pin locations.