308C CR Excavator Hydraulic System – Swing Motor – Disassemble

Disassembly Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1U-7506     Transmission Adapter Kit     1    
8T-4244 Nut (M12 by 1.75 inch)     6    
8T-4223 Hard Washer     6    
– Threaded Rod (M12 by 1.75 by 6 inch)     2    
B     8T-0296     Bolt     2    
5P-8246 Hard Washer     2    
8T-3282 Hard Washer     2    
C     8H-0663     Bearing Puller Gp     1    
D     1P-1861     Retaining Ring Pliers     1    

Start By:

  1. Remove the swing motor. Refer to Disassembly and Assembly, “Swing Motor -Remove”.

Note: Cleanliness is an important factor. Before you begin the disassembly procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform disassembly procedures on a clean work surface. Keep components covered and protected at all times.
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.


    Illustration 1 g00874546

  1. Place swing motor (3) on appropriate blocking. The weight of the swing motor is approximately 37 kg (80 lb).

    Note: Note the orientation of pipe assembly (1) for installation purposes.

  1. Remove pipe assembly (1) and oil level gauge (2) .

    Illustration 2 g00874603

  1. Remove bolts (4) and remove makeup valve (5) .

    Illustration 3 g00874689

  1. Remove O-ring seals (6) .

    Illustration 4 g00874694

  1. Remove plugs (7) from makeup valve (5) .

    Illustration 5 g00874711

  1. Remove O-ring seals (8) from plugs (7) .

    Illustration 6 g00874713

  1. Remove plugs (10) from the other side of makeup valve (5). Remove O-ring seals (9) .

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

    Personal injury can result from parts and/or covers under spring pressure.

    Spring force will be released when covers are removed.

    Be prepared to hold spring loaded covers as the bolts are loosened.
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    Illustration 7 g00874716



    Illustration 8 g00874779

  1. Remove plugs (11) from makeup valve (5) .
  1. Remove O-ring seals (12) from plugs (11). Remove springs (13), valves (14), and spool (15) from makeup valve (5) .

    Illustration 9 g00874786

  1. Remove bolts (16) and head (17) from the swing motor.

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

    Personal injury can result from parts and/or covers under spring pressure.

    Spring force will be released when covers are removed.

    Be prepared to hold spring loaded covers as the bolts are loosened.
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    Illustration 10 g00874791