C280-08 Tier 4 Engine Diesel Exhaust Fluid Pump - Remove and Install Caterpillar

Diesel Exhaust Fluid Pump - Remove and Install
1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number   Part Description  Qty 
147-6456  Wedge Removal Tool 

Start By:

  1. Remove diesel exhaust fluid manifold.


Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.

Dispose of all fluids according to local regulations and mandates.

    Illustration 1g03499218

  1. Remove top panel (1).

    Illustration 2g03505823

  2. Disconnect harness assembly (2).

    Note: Record the location of each wire prior to removal. Diesel exhaust fluid pump wires must be reinstalled in the correct locations or severe damage can occur.

  3. Use the follow procedure in order to disconnect the harness assembly from the circuit breaker.

      Illustration 3g03505826

    1. Loosen screw (4) and remove wire (5) from circuit breaker (3).

      Illustration 4g03505834

    2. Install Tooling (A) into the cavity as shown in order to disengage the retainer.

      Illustration 5g03505839

    3. Gently pull wire (6) out of circuit breaker (3).

      Note: Repeat Steps 3.b and 3.c for the remaining wire.

    Illustration 6g03505842

  4. Remove cable straps (7).

    Illustration 7g03505854

  5. Remove wing nuts (8) and position the harness assembly and the hose assemblies aside.

    Illustration 8g03505862

  6. Remove hold-downs (9) and remove diesel exhaust fluid pump (10).

    Illustration 9g03505865

  7. Note the orientation of the check valves and remove check valve (11) and (12).

Installation Procedure

  1. Install diesel exhaust fluid pump (10) in the reverse order of removal.