950K and 962K Wheel Loaders C7.1 Engine Supplement Caterpillar

Removal Procedure

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Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately.

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Hot engine components can cause injury from burns. Before performing maintenance on the engine, allow the engine and the components to cool.

1. Open the hood.

2. Drain the coolant until the level is below the combustion head. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct draining and filling procedures.

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Illustration 1	g02623338

3. Remove bolts (8) (not shown) from tube assembly clamps (9) .

4. Disconnect fuel tube assembly (10) from combustion head (12). Plug the tube assembly with new plugs. Cap all open connectors on the combustion head with new caps.

5. Disconnect coolant tube assembly (2) and coolant tube assembly (3) from combustion head (10). Plug the tube assemblies with new plugs. Cap all open connectors on the combustion head with new caps.

6. Remove bolt (4) from the ground strap and disconnect ignition wire (1) from the spark plug.

7. Remove allen head screw (11) and remove the clamp from combustion head (10). Remove heated nozzle connection (7) from the combustion head.

8. Remove flame detection temperature sensor (13) from combustion head (10). Refer to Disassembly and Assembly, "Flame Detection Temperature Sensor - Remove and Install" for the correct procedure.

9. Remove hex head bolts (5) and remove gasket (6) (not shown).

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Illustration 2	g02624224

10. Remove spark plug (14) from combustion head (10). Refer to Disassembly and Assembly, "Spark Plug - Remove and Install" for the correct procedure.

11. Loosen nuts (15) in a crisscross pattern. Remove nuts (15) from combustion head (9) .

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Illustration 3	g02624241

12. Remove combustion head (10) .

13. Remove gasket (18). Remove combustion tube assembly (17) and remove gasket (16) .

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Illustration 4	g02624256

14. If necessary, follow Step 14.a through Step 14.b in order to remove fuel connection and the connections for the coolant from the combustion head.

    1. Remove fuel connection (24) from combustion head (10) .

    2. Remove O-ring seal (23) from connection (24) .

    3. Remove coolant connection (19) and coolant connection (21) from combustion head (9) .

    4. Remove O-ring seal (20) (not shown) from coolant connection (19) .

    5. Remove O-ring seal (22) (not shown) from coolant connection (21) .

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Illustration 5	g02158585

15. If necessary, remove studs (26) from body (25) of the .

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 6	g02158585

2. If necessary, install studs (26) to body (25). Apply Tooling (A) onto the threads of studs (26). Install the studs to body (25) of the.

   Tighten studs (26) to a torque of 17 N·m (150 lb in).

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Illustration 7	g02624243

3. If necessary, follow Step 3.a through Step 3.d in order to install the fuel connection and the connections for the coolant to the combustion head.

   1. Ensure that the filter in fuel connection (24) is clean and free from damage. Ensure that the filter in the combustion head (10) is clean and free from damage.

   2. Install a new O-ring seal (23) to fuel connection (24). Install the connection to combustion head (10). Tighten the connection to a torque of 60 N·m (44 lb ft).

   3. Install a new O-ring seal (20) (not shown) to coolant connection (19). Install coolant connection (19) to combustion head (10). Tighten the connections to a torque of 30 N·m (266 lb in).

   4. Install a new O-ring seal (22) (not shown) to coolant connection (21). Install coolant connection (21) to combustion head (10). Tighten the connections to a torque of 30 N·m (266 lb in).

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Illustration 8	g02624241

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Illustration 9	g02624224

4. Thoroughly clean the gasket surfaces of the combustion head, combustion tube assembly, and the body. Do not damage the gasket surfaces of the combustion head of the body. Ensure that no debris enters the assembly of the clean emission module.

5. Install a new gasket (16) and install combustion tube assembly (17). Install a new gasket (18) .

6. Install combustion head (10) .

7. Apply Tooling (A) onto the threads of the studs and nuts (15). Install nuts (15) to combustion head (10) .

8. Tighten nuts (15) in a crisscross pattern to a torque of 23 N·m (204 lb in). Tighten nuts (15) again in a crisscross pattern to a torque of 28 N·m (248 lb in). Tighten nuts (15) again in a crisscross pattern to a torque of 28 N·m (248 lb in).

9. Install spark plug (14) to combustion head (10). Tighten spark plug (14) to a torque of 47 N·m (35 lb ft). Refer to Disassembly and Assembly, "Spark Plug - Remove and Install" for the correct procedure.

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Illustration 10	g02623338

10. Install a new gasket (6) (not shown). Install hex head bolt (5). Tighten head bolts (5) to a torque of 28 N·m (248 lb in).

11. Apply Tooling (B) to the thread of flame detection temperature sensor (13). Install flame detection temperature sensor (13) to the combustion head. Tighten flame detection temperature sensors (13) to a torque of 45 N·m (33 lb ft). Refer to Disassembly and Assembly, "Flame Detection Temperature Sensor - Remove and Install" for the correct procedure.

12. Install heated nozzle connection (7) to the combustion head. Install allen head bolt (11) .

13. Use Tooling (C) in order to tighten the allen head bolt to a torque of 1.7 N·m (15 lb in).

14. Connect ignition wire (1) to the spark plug. Install bolt (4) to the ground strap. Tighten bolt (4) to a torque of 12 N·m (106 lb in).

15. Remove the plug from fuel tube assembly (12). Remove the cap from connection on the combustion head. Connect fuel tube assembly (12) to the combustion head. Hand tighten fuel tube assembly.

16. Remove the plug from coolant tube assembly (2) and coolant tube assembly (3). Remove the cap from coolant connections on the combustion head. Connect coolant tube assembly (2) and coolant tube assembly (3) to the combustion head. Hand tighten coolant tube assemblies.

17. Position tube assembly clamps (9) onto tube assemblies. Install hex head bolt (8) (not shown) to tube assembly clamps (9). Hand tighten hex head bolt (8) .

18. Tighten coolant tube assembly (2) and coolant tube assembly (3) to a torque of 20 N·m (177 lb in).

19. Tighten fuel tube assembly (12) to a torque of 16 N·m (142 lb in).

20. Tighten hex head bolt (8) to a torque of 12 N·m (106 lb in).

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

22. Fill the cooling system to the correct level. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Check" and Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct filling procedure.

23. Perform the ignition test. Refer to Troubleshooting, "Ignition - Test" for the correct filling procedure.