SEAL-O-RING 4337022 - Caterpillar

Use a Vernier scale or a similar tool to measure the dimension in Step 23.i.
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Measure the distance from the top of the surface plate to the top of Tooling (G). Record this dimension as Dimension (X). Measure the distance from the top of Tooling (G) to the top of retainer plate (25). Record this dimension as Dimension (W).
Table 2
CALCULATION
Subtract Dimension (W) from Dimension (X) to obtain Dimension (Y).
Dimension (Y) is the Lift Off Height. Note: The dimension is 131.0 + 0.0 − 0.2 mm (5.1575 + 0.0 − 0.0079 inch). Call this Dimension (Z).
Table 3
CALCULATION
Subtract Dimension (Y) from Dimension (Z) to obtain the thickness of shim (66). This will provide the correct Lift Off Height.
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Install shim (29). Refer to Step 23.i for the correct size. Install springs (28) in the correct sequence.
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Install ball joint (26) on the shim and barrel assembly (27). Install pistons (24) and retainer plate (25).
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Wrap a piece of nylon string around the pistons, as shown. Lower rotating assembly (23) into the pump. Use the nylon string to hold the assembly together during installation. Remove the nylon string.
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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 O-ring seal (21) to compensator valve (22).
Install piston (17).
Install retainer (18) to compensator valve (22). Install spring (19) to compensator valve (22). Install retainer (20) to compensator valve (22).
Install compensator valve (22).
Install O-ring seal (16) to test port (15). Install test port (15).
Install O-ring seal (14) to relief valve (13). Install relief valve (13).
Install O-ring seal (12).
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Install port plate (11) and O-ring seal (10).
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Install head (9). Install bolts (8).
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Install flange (7). Install bolts (6).
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Install cartridge (4) and coils (3). Install the O-ring seals and control valve (5).
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Install tube assemblies (2). Install the cover and bolts (1). End By:
Install the steering pump.