BLOCK 4Z8761 - Caterpillar

Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-6396 O-Ring Assembly Compound Note: O-ring seals, gaskets, and seals should always be replaced. A used O-ring seal may not have the same sealing properties as a new O-ring seal. Use Tooling (A) during the assembly procedure.
Install the relief valves, as follows
Illustration 1 g02657637
Install new backup ring (13) and new O-ring seal (14) on the relief valve.
Illustration 2 g02657656
Install ball valve (10), plunger (11), and spring (12) in relief valve (9).
Illustration 3 g02657678
Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Install relief valve (9) in the valve body. Tighten relief valve (9) to a torque of 69 7 N m (51 5 lb ft).
Repeat steps 1 through 1.c for the remaining relief valve.
Install the fine swing solenoid, as follows.
Illustration 4 g02657716
Install new O-ring seals (5), (7), (6), and (8).
Illustration 5 g02657736
Install fine swing solenoid (4).
Install bolts (3). Tighten bolts (3) to a torque of 7 .7 N m (62.0 6.20 lb in).
Illustration 6 g02657740
Install O-ring seals (1) and (2) in the valve body. End By:
Install the swing cushion valve.