TUBE A. 4J8989 - Caterpillar

Remove valve (22).
Illustration 14 g00841878
Remove cap (26), seat (25), spring (24), and spool (23).
Remove the cap, the seat, the spring, and the spool from the other side of the head.
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Remove plug (27).
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Use Tooling (A) in order to remove shuttle valve (28).
Illustration 17 g00841894
Install Tooling (C). Remove seal (29).
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Remove plastic caps (30).
Illustration 19 g00841898Note: Record the distance from the locknut to the end of the set screw for installation purposes.
Remove locknuts (31) and screws (32).
Illustration 20 g00841889
Use Tooling (E) to remove retaining ring (34).
Remove shim (33).
Illustration 21 g00841908
Use Tooling (B) in order to remove seal (35).
Illustration 22 g00841930
Use a suitable press in order to remove rotator assembly (36).
Illustration 23 g00841931
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.
Remove Tooling (C) from barrel (37).
Illustration 24 g00841932
Remove screws (38) from retainer (39). Remove pistons (40) and center pin (41).
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Remove spring (42) and shim (43).
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Remove retaining ring (44) and shim (45).
Illustration 27 g01288673
Place the rotor assembly in a suitable press. Use Tooling (D) in order to press shaft (46) from bearing (47), shim (48), and bearing (49).