C7.1 Engines for Caterpillar Built Machines Ignition Coil (ARD) - Remove and Install - Clean Emissions Module Caterpillar

Removal Procedure

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The ignition system may cause an electrical shock hazard, which may cause personal injury or death. Avoid contacting the ignition system components and the ignition system wiring during operation.

1. Turn the battery disconnect switch to the OFF position.
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   Illustration 1	g02155833
   Typical example

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   Illustration 2	g02155834
   Typical example

2. Cut required cable straps (5) in order to remove harness assemblies.

   Note: Note position of cable straps.

3. Slide the locking tab for harness assembly (4) into the unlocked position.

4. Disconnect harness assembly (4) for ignition coil (2) from the harness assembly for the clean emission module.

5. Disconnect ignition wire (6) from ignition coil (2).

6. If necessary, remove bolt (1) in order to remove ground strap (4) from ignition coil (2).

7. If necessary, remove the tube assembly for the pressure sensor for the Diesel Particulate Filter (DPF).

8. Remove bolts (1) and spacers from ignition coil (2). Remove ignition coil (2) from the bracket for the clean emission module.

   Note: Note position of any brackets.

9. If necessary, follow Step 9.a through Step 9.e in order to remove ignition wire (6) from clean emission module.

   1. Cut remaining cable straps (5) and cable straps (8) from harness assembly (6).

      Note: Note position of cable straps. Ensure that all cable straps are removed from the harness assemblies.

   2. If necessary, remove the nut and washer. Disconnect the ground strap for ignition wire (6) from the bracket for the clean emission module.

   3. Remove bolt (9) for ground strap (4) from the combustion head.

   4. Disconnect ignition wire (6) from spark plug (7).

   5. Make temporary marks on the ignition wire assembly for installation purposes. Remove ignition wire (6) assembly from the clean emission module.

Installation Procedure

1. Ensure that all components are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
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   Illustration 3	g02155834
   Typical example

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   Illustration 4	g02155833
   Typical example

2. If necessary, follow Step 2.a through Step 2.e in order to install ignition wire (6) onto clean emission module.

   1. Position ignition wire assembly onto the clean emission module. Ensure that the ignition wire assembly is orientated correctly.

   2. Install ignition wire (6) onto spark plug (7).

   3. Position ground strap (4) onto combustion head and install bolt (9).

   4. Tighten bolt (9) to a torque of 12 N·m (106 lb in).

      Note: Ensure that the ground strap is not strained as the bolt is tightened.

   5. If necessary, connect the ground strap for ignition wire (6) to the bracket for the clean emission module. Install the nut and washer and tighten the nut to a torque of 12 N·m (106 lb in).

3. Loosely install bolts (1) and spacers to ignition coil (2).

4. Position ignition coil (2) onto the bracket for the clean emission module. Install all brackets that have been removed during disassembly.

5. If necessary, position ground strap (4) onto ignition coil (2). Install bolt (1) and spacer.

6. Tighten bolts (1) to a torque of 12 N·m (106 lb in).

   Note: If necessary, ensure that the ground strap is not strained as the bolt is tightened.

7. Install ignition wire (6) to ignition coil (2).

8. Connect harness assembly (4) for ignition coil (2) to the harness assembly for the clean emission module.

9. Slide the locking tab for harness assembly (4) into the locked position.

10. If necessary, install the tube assembly for the pressure sensor for the Diesel Particulate Filter (DPF). Tighten the nuts on tube assembly to a torque of 16 N·m (142 lb in).

11. Install new cable straps (5) and cable straps (8) to harness assembly (6).

    Note: Ensure that cable straps meet the OEM specification.

12. Turn the battery disconnect switch to the ON position.