C280-08 Tier 4 Engine Manifold (DEF Air) - Remove and Install Caterpillar


Manifold (DEF Air) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number   Part Description  Qty 
207-1601  Rubber Lubricant 
Loctite 536 Low Break-loose PST Pipe Sealant 

  1. Turn off the air supply to the dosing cabinet.

  2. Disconnect the air supply from the dosing cabinet.


    Illustration 1g03506145


    Illustration 2g03506141

  3. Remove front panel (1) and panel (2).


    Illustration 3g03506148

  4. Disconnect harness assemblies (3) and (4).


    Illustration 4g03506154

  5. Remove bolts (6) and remove air manifold (5).


    Illustration 5g03506180

  6. Remove air inlet screen (7).


    Illustration 6g03506185


    Illustration 7g03506189

  7. Remove regulator (8). Remove O-ring seals (9).


    Illustration 8g03506192


    Illustration 9g03506201

  8. Remove solenoid (10). Remove O-ring seals (11).


    Illustration 10g03506205


    Illustration 11g03506209

  9. Remove pressure sensor (12). Remove O-ring seal (13).

Installation Procedure

  1. Install air manifold (5) in the reverse order of removal.

    1. Use Tooling (A) to lubricate the O-ring seals.

    2. Tighten pressure sensor (12) to a torque of 10 ± 2 N·m (89 ± 18 lb in).

    3. Tighten solenoid (10) to a torque of 60 ± 5 N·m (44 ± 4 lb ft).

    4. Tighten regulator (8) to a torque of 140 ± 14 N·m (103 ± 10 lb ft).

    5. Apply Tooling (B) to the threads of air inlet screen (7) and install air inlet screen (7) with the arrow pointing towards the dosing cabinet.