BODY 4542957 - Caterpillar

Install piston (21) in the bore.
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Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Install pressure pins (20), retaining disc (19), and spring (18) in barrel (16).
Install retaining ring (18) on top of spring (19). Use Tooling (A) and a suitable press to compress spring (19). Compress until retaining ring (18) can be installed in the groove in barrel (17) with Tooling (B).
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Install bearing (13) on barrel (16) and install retaining plate (15) with pistons (14) in barrel (16).Note: Set bearing preload before you install the rotating group. The bearing preload should be 0.00 mm (0.000 inch) to 0.050 mm (0.0020 inch).
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Do not install shim (11). Install bearing cone (10) onto shaft (7). Assemble the pump without shim (11) to check the preload of bearing cone (10).
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Typical Example
Install the port block (1). Install screws (2). Tighten to the torque of 165 N m (122 lb ft).
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Install Tooling (D) onto the pump housing. Use the dial indicator to determine the end play of shaft (7). Be sure that you move shaft (7) completely in both directions. Use appropriate tools to move shaft (7).
The thickness of the shim should equal the end play measurement plus 0.0508 mm (0.00200 inch). For example, if the end play is 2.1590 mm (0.08500 inch) then the shim thickness should be 2.2098 mm (0.08700 inch).
Record the measurement. If necessary, grind the shim to the determined measurement.
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Typical Example
Remove bolts (2), port block (1), and the bearing cone.
Illustration 14 g01847724Note: All parts must be in the proper position.
Wrap pistons (14) with string but do not tie the string. Hold the string tight and carefully install the rotating group in housing (3). The splines on shaft (7) must engage with splines in the bearing.
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Install plug (12) and the O-ring seal. Tighten plug (12) to 90 15 N m (66 11 lb ft). Install shim (11).
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Install bearing cone (10) on shaft (7). Install O-ring seals (8).
Install O-ring seal (6) and plate (9) to the port block (1). Install port block (1) on housing (3).
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Typical Example
Install screws (2). Tighten to the torque of 165 N m (122 lb ft).
Position compensator valve (4) on housing (3). Install screws (5) and tighten to a torque of 11 N m (97 lb in).End By:
Install the piston pump.