325F Excavator Engine Supplement Caterpillar

Removal Procedure

1. Turn the battery disconnect switch to the OFF position.
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   Illustration 1	g03728150

2. Disconnect harness assembly (1) from inlet pressure sensor (2).

3. Use a suitable deep socket to remove inlet pressure sensor (2) from manifold (3).

4. Remove O-ring seal (4) from inlet pressure sensor (2).

5. Cut cable strap (9) from harness assembly (8).

6. Disconnect harness assembly (8) from differential pressure sensor (7).

7. Remove bolts (5) from differential pressure sensor (7). Remove differential pressure sensor (7) from manifold (3). Remove O-ring seals (6) (not shown).
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   Illustration 2	g03728151

8. If necessary, follow Step 8.a through Step 8.c to remove the manifold (3) and the hose assemblies from NRS Induction mixer (17).

   1. Use a suitable tool to remove clamp (11) and clamp (14) from hose assembly (12) and hose assembly (15). Disconnect hose assembly (12) and hose assembly (15) from manifold (3).

   2. Remove Torx screws (10) from manifold (3). Remove manifold (3) from NRS Induction mixer (17).

   3. Use a suitable tool to remove clamp (13) (not shown) and clamp (16) from hose assembly (12) and hose assembly (15). Remove hose assembly (12) and hose assembly (15) from NRS Induction mixer (17).
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   Illustration 3	g03728459

9. If necessary, follow Step 2.a through Step 2.c to remove the connectors from manifold (3) and NRS Induction mixer (17).

   1. Remove connector (19) and connector (21) from manifold (3).

   2. Remove O-ring seal (18) (not shown) and O-ring seal (20) (not shown) from connector (19) and connector (21).

   3. Make temporary marks on connector (23) and connector (25) for installation purposes. Remove the connectors from NRS Induction mixer (17).

   4. Remove O-ring seal (22) (not shown) and O-ring seal (24) (not shown) from connector (23) and connector (25).

Installation Procedure

1. Ensure that all components are clean and free from wear damage and restriction. If necessary, replace any components that are worn, damaged, or not free from restriction.
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   Illustration 4	g03728459

2. If necessary, follow Step 2.a through Step 2.e to install connectors to manifold (3) and to NRS Induction mixer (17).

   1. Install a new O-ring seal (22) (not shown) and a new O-ring seal (24) (not shown) to connector (23) and connector (25).

   2. Install connector (19) and connector (21) to NRS Induction mixer (17). Ensure that connector (23) and connector (25) are installed into the correct position on NRS Induction mixer (17).

   3. Tighten connection (19) and connector (21) to a torque of 17 N·m (150 lb in).

   4. Install a new O-ring seal (18) (not shown) and a new O-ring seal (20) (not shown) to connector (19) and connector (21).

   5. Install connector (19) and connector (21) to manifold (3). Tighten the connector (19) and connector (21) to a torque of 17 N·m (150 lb in).
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   Illustration 5	g03728151

3. If necessary, follow Step 3.a through Step 3.e to install the manifold (3) and the hose assemblies on NRS Induction mixer (17).

   1. Install new hose clamp (13) (not shown) and new hose clamp (16) onto hose assembly (12) and hose assembly (15). Ensure that hose clamp (13) and hose clamp (16) are correctly orientated.

   2. Install hose assembly (12) and hose assembly (15) onto NRS Induction mixer (17). Ensure that hose assembly (12) and hose assembly (15) are installed in the correct position on the connectors on the NRS Induction mixer.

   3. Install new hose clamp (11) and new hose clamp (14) onto hose assembly (12) and hose assembly (15). Ensure that hose clamp (11) and hose clamp (14) are correctly orientated.

   4. Position manifold (3) onto NRS Induction mixer (17). Install hose assembly (12) and hose assembly (15) onto manifold (3). Ensure that hose assembly (12) and hose assembly (15) are installed in the correct positions on the connectors on the manifold.

   5. Install Torx screws (10) to manifold (3). Tighten the Torx screws to a torque of 10 N·m (89 lb in).

   6. Use a suitable tool to tighten clamp (11), clamp (14), clamp (13) (not shown), and clamp (16) to a torque of 3.5 N·m (31 lb in). Ensure that hose assembly (12) and hose assembly (15) are correctly orientated.
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   Illustration 6	g03728150

4. Install new O-ring seals (6) (not shown) to differential pressure sensor (7). Ensure that new O-rings (6) are correctly installed into the recesses of differential pressure sensor (7).

5. Install differential pressure sensor (7) onto manifold (3). Ensure that differential pressure sensor (7) is installed in the correct orientation on manifold (3).

6. Install bolts (5) to differential pressure sensor 7. Tighten the bolts to a torque 22 N·m (195 lb in).

7. Connect harness assembly (8) to differential pressure sensor (7).

8. Install a new O-ring seal (4) to inlet pressure sensor (2).

9. Use a deep socket to install inlet pressure sensor (2) to manifold (3). Tighten inlet pressure sensor (2) to a torque of 10 N·m (89 lb in).

10. Connect harness assembly (1) to inlet pressure sensor (2).

11. Install a new cable strap (9) to harness assembly (8).

    Note: Ensure that cable strap (9) meets the Original Equipment Manufacturer (OEM) specification.

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