446D Backhoe Loader Machine Systems Caterpillar


Piston and Vane Pump - Remove

Usage:

446D DBL

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
1U-7505  Hydraulic Jack 
ZZ  9U-7071  Tapered Cap/Plug 
9U-7072 Tapered Cap/Plug 
9U-7090 Tapered Cap/Plug 
9U-7091 Tapered Cap/Plug 
6V-9830 Cap As 
6V-9509 Plug 
6V-9832 Cap As 
6V-9511 Plug 
6V-9833 Cap As 
6V-9512 Plug 
6V-9508 Plug 
6V-9829 Cap As 

Start By:

  1. Remove the counterweight. Refer to Disassembly and Assembly, "Counterweight - Remove and Install".

  2. Remove the pump drive. Refer to Disassembly and Assembly, "Pump Drive - Remove and Install".

Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.


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.


  1. Drain the hydraulic fluid into a suitable container. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change".


    Illustration 1g01087572

  2. Disconnect hose assembly (3).

  3. Loosen clamps (5).

  4. Disconnect hose (4).

  5. Loosen clamp (1).

  6. Disconnect hose (2).


    Illustration 2g01087573

  7. Disconnect hose assemblies (6), (7), and (8).


    Illustration 3g01087574

  8. Install Tooling (A) in order to support piston and vane pump (10).

  9. Loosen bolt (9).


    Illustration 4g01087575

  10. Remove bolts (11).

  11. Use Tooling (A) in order to remove piston and vane pump (10). The weight of piston and vane pump (10) is approximately 64 kg (140 lb).

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