446D Backhoe Loader Machine Systems Caterpillar


Pilot Valve (Stabilizer) - Disassemble

Usage:

446D DBL

Disassembly Procedure

Start By:

  1. Remove the pilot valve (stabilizer) from the cab. Refer to Disassembly and Assembly, "Pilot Valve (Stabilizer) - Remove".


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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.

Dispose of all fluids according to local regulations and mandates.



NOTICE

Keep all parts clean from contaminants.

Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.

To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.

Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.


Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes.



    Illustration 1g00768366

  1. Remove bolts (1) and the washers from bracket (2).

  2. Repeat Step 1 in order to remove the bolts and washers from the other side of bracket (2).

  3. Remove bracket (2) from the pilot valve.


    Illustration 2g00768370

  4. Remove screws (3) from the pilot valve.


    Illustration 3g00768379

  5. Remove lever kit (4) and plate (5) from valve body (6).

  6. Repeat Step 5 for the other lever kit.


    Illustration 4g00768383

  7. Remove screws (7) and the washers.

  8. Reposition plate (8) in order to allow access to the retaining pin.


    Illustration 5g00768385

  9. Remove retaining pin (9).


    Illustration 6g00768388

  10. Remove lever (10).

  11. Repeat Step 7 through Step 10 in order to disassemble the other lever kit.


    Illustration 7g00768393

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

    Personal injury can result from being struck by parts propelled by a released spring force.

    Make sure to wear all necessary protective equipment.

    Follow the recommended procedure and use all recommended tooling to release the spring force.


  12. Remove plunger (14), O-ring seal (13), regulator (12), and spring (11).

  13. Repeat Step 12 for the remaining ports.


    Illustration 8g00768396

  14. Remove bolts and nuts (15) in order to separate the valve body.

  15. Separate the valve body.


    Illustration 9g00768399

  16. Remove O-ring seals (16).

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