WHEEL ASSEM. 8K8790 - Caterpillar

Illustration 4 g00873688
Install shaft (13) in pump housing (26), as shown.
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Install two bearings (29) in pump housing (26) .
Illustration 6 g00873686
Install two stop assemblies (28) in swashplate (25) .
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Install two plugs (27) in swashplate (25) .
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Install swashplate (25) in pump housing (26), as shown.
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Install three reaction pins (24) in the original positions in barrel (19) .
Install spacer (22) and spring (23) in barrel (19) .
Use a suitable press in order to compress spring (23) in barrel (19) .
Use Tooling (A) in order to install retaining ring (21) .
Carefully release the spring pressure.
Illustration 10 g00873679
Install bearing (20) on barrel (19) .
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Install nine piston assemblies (17) in the original positions in reaction plate (18) .
Install nine piston assemblies (17) and reaction plate (18) in the original position in barrel (19) .
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Position the pump housing, as shown.
Install barrel assembly (15) and spacer (14) on the shaft in the pump housing.
O-ring seal (16) in the pump housing.
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Heat bearing cone (12) to a maximum temperature of 120 °C (250 °F).
Use proper protective equipment in order to install bearing cone (12) on shaft (13) .
Illustration 14 g00873674
Install four O-ring seals (11) in head (1) .
Install pin (9) in head (1) .
Lower the temperature of bearing cup (10) and install the bearing cup in head (1) .
Install piston (8) in head (1) .
Install guide (7) in head (1) .
Illustration 15 g00873672
Install port plate (4) in the original position in head (1) .
Install spring (5) and plunger (4) in head (1) .
Install piston (3) in head (1) .
Illustration 16 g00873671
Install head (1) in the original position on the pump housing.
Install four bolts (2) in the head.End By:
Install the pressure and flow compensator valve to the fan drive pump. Refer to Disassembly and Assembly, "Pressure and Flow Compensator Valve (Hydraulic Fan) - Remove and Install" for the machine that is being serviced.
Install the fan drive pump. Refer to Disassembly and Assembly, "Piston Pump (Hydraulic Fan) - Install" for the machine that is being serviced.