C7 On-Highway Engine Caterpillar

Removal Procedure

Start By:

1. Remove the fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Remove and Install".

2. Remove the rocker arms and pushrods. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Remove".

3. Remove the unit injector hydraulic pump. Refer to Disassembly and Assembly, "Unit Injector Hydraulic Pump - Remove".

4. Remove the air compressor. Refer to Disassembly and Assembly, "Air Compressor - Remove and Install".

5. Remove the speed/timing sensors. Refer to Disassembly and Assembly, "Speed/Timing Sensor - Remove and Install".

6. Remove the engine control module (ECM). Refer to Disassembly and Assembly, "Engine Control Module - Remove and Install".

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Illustration 1	g01125745

1. Remove bolts (1).

2. Remove side covers (2).
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   Illustration 2	g01125748

3. Place identification marks on each lifter in order to identify the proper location on the side cover for installation.

   Note: Ensure that the sleeves of the side covers remain in the side covers.

4. Remove bolts (3) and the dowels that hold lifter arms (4) and lifter shaft (5) to each side cover. Remove seal (6).

Installation Procedure

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Illustration 3	g01125748

1. Install seal (6).

2. Install lifter arms (4) on lifter shaft (5).

3. Position lifter shaft (5) over the dowels on the side cover. Ensure that the oil holes in the lifter shaft are facing the side cover. Apply Tooling (A) on the threads of bolts (3) that hold lifter shaft (5) to the side cover. Install bolts (3). Tighten bolts (3) to a torque of 13 ± 3 N·m (10 ± 2 lb ft). Tighten the two center bolts. Then tighten the end bolts.

4. Lubricate the lifters with clean engine oil.
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   Illustration 4	g01125745

5. Position the gaskets and side covers (2). Install bolts (1).

End By:

1. Install the engine control module (ECM). Refer to Disassembly and Assembly, "Engine Control Module - Remove and Install".

2. Install the speed/timing sensors. Refer to Disassembly and Assembly, "Speed/Timing Sensor - Remove and Install".

3. Install the air compressor. Refer to Disassembly and Assembly, "Air Compressor - Remove and Install".

4. Install the unit injector hydraulic pump. Refer to Disassembly and Assembly, "Unit Injector Hydraulic Pump - Install".

5. Install the rocker arms and pushrods. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Install".

6. Install the fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Remove and Install".