794 AC Off-Highway Truck Caterpillar


Diesel Exhaust Fluid Filter - Replace - Emission Related Component

Usage:

794 AC HRT

------ WARNING! ------

Personal injury can result from improper handling of chemicals.

Make sure you use all the necessary protective equipment required to do the job.

Make sure that you read and understand all directions and hazards described on the labels and material safety data sheet of any chemical that is used.

Observe all safety precautions recommended by the chemical manufacturer for handling, storage, and disposal of chemicals.



NOTICE

Ensure that the engine is stopped before any servicing or repair is performed.



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, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools 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 1g06272388

  1. Remove the access covers for the diesel exhaust fluid (DEF) filters.


    Illustration 2g06147723

  2. There are four DEF filters. Replace all four filters.


    Illustration 3g03332612
    Typical Example

  3. Remove the DEF filter cap (3) with a 27 mm (1.06 inch) wrench.

  4. Remove the rubber cone insert (2) from the DEF filter (1).


    Illustration 4g03332637
    Typical Example

  5. Insert the DEF filter removal tool (4) into the DEF filter (1) and remove the DEF filter (1).

    Note: Avoid twisting the DEF filter (1) upon removal. Twisting may cause a tear.

  6. Clean the area around the filter housing.

  7. Lubricate the seals of the new DEF filter (1) with diesel exhaust fluid or distilled water.

  8. Install new DEF filter (1) and rubber cone insert. Torque the filter to 20 ± 5 N·m (14.8 ± 3.7 lb ft) with a 27 mm (1.06 inch) wrench.

    Note: Avoid twisting the DEF filter (1) upon installation. Twisting may cause a tear.

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