C280-08 Tier 4 Engine Solenoid Valve (DEF Return) - Remove and Install Caterpillar


Solenoid Valve (DEF Return) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure


NOTICE

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.


  1. Turn off the diesel exhaust fluid supply to the dosing cabinet.

  2. Turn off the power supply to the dosing cabinet.

  3. Wait 30 seconds, then turn off the air supply to the dosing cabinet.


    Illustration 1g03499661

  4. Remove panel (1).


    Illustration 2g03499663

  5. Disconnect harness assembly (2).


    Illustration 3g03499665

  6. Remove cable strap (3).

  7. Remove solenoid (4).


    Illustration 4g03499670

  1. Remove O-ring seals (5) and (6).

Installation Procedure

  1. Install solenoid (4) in the reverse order of removal.

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

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