LINK AS 3888173 - Caterpillar

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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 springs (52) and retainer (51) into housing (41). Use a suitable press in order to compress springs (52) and install retaining ring (50).
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Install spool (48), O-ring seal (47), dowels (46), plate (45), and bolts (44). Install fitting (49).
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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 coil assembly (39), pin (38), O-ring seal (37), and cartridge assembly (36). Tighten cartridge assembly (36) to a torque of 35 3 N m (26 2 lb ft). Install seals (42) and (43) into housing (41).
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Install O-ring seal (35), actuator assembly (34), and bolts (33).
Repeat Step 7 through 9 for the assembly of the actuators. Install remaining actuator assemblies (53) and (54).
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Install relief valves (31) and (32). Tighten all four relief valves to a torque of 325 40 N m (240 30 lb ft).
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Install ball (26) and seat (27). Install O-ring seals (29), backup rings (30), and O-ring seal (28) onto shuttle valve (22). Install shuttle valve (22).
Install O-ring seals (24), backup rings (23), and O-ring seal (25) onto valve (21). Install valve (21).
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Install all the O-ring seals and plate (18). Install bolts (19) and (20). Tighten all of the nuts for plate (18) to a torque of 50 10 N m (37 7 lb ft).
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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 spring (7). Lower the temperature of seat (8) and install seat (8). Install valve (9), O-ring seal (10), and cap (11) onto body (6). Tighten cap (11) to a torque of 110 10 N m (81 7 lb ft).
Install seal (12), dowel (13), spring (14), plate (15), retainer assembly (16), and nut (17). Tighten nut (17) to a torque of 50 7 N m (37 5 lb ft). Install O-ring seals (4) and (5) onto body (6).
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Install manifold (2) and bolts (1). Install relief valve (3) from manifold (2). End By:
Install the main control valve. Refer to Disassembly and Assembly, "Main Control Valve - Install".