336E Excavator and 336E MHPU Mobile Hydraulic Power Unit Machine Systems Load Control Valve (Boom Cylinder) - Assemble Caterpillar

Assembly Procedure

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Illustration 1	g02152277

Note: Install shims (29) and piston (30). Install the required number of shims (29) in order to set a distance of 7.75 ± 0.10 mm (0.305 ± 0.004 inch) between guide assembly (28) and piston (30).

1. Install O-ring seal (27), guide assembly (28), shims (29), piston (30), pin (31), ring (32), O-ring seal (34), flow control valve (35), O-ring seal (36), and plug assembly (37). Tighten guide assembly (28) to a torque of 35 ± 4 N·m (26 ± 3 lb ft). Tighten flow control valve (35) to a torque of 215 ± 25 N·m (159 ± 18 lb ft). Tighten plug assembly (37) to a torque of 23 ± 2 N·m (204 ± 18 lb in).
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   Illustration 2	g02152274

2. Install orifices (24), O-ring seals (25), and plug assemblies (26) into load control valve (1). Tighten orifices (24) to a torque of 13 ± 2 N·m (115 ± 18 lb in). Tighten plug assemblies (26) to a torque of 23 ± 2 N·m (204 ± 18 lb in).
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   Illustration 3	g02152273

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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.

3. Remove O-ring seals (16), (17), (19), (20), and (23). Remove ring seals (18) and (21). Tighten valve body (22) to a torque of 59 ± 6 N·m (44 ± 4 lb ft). Tighten nut (15) to a torque of 20 ± 2 N·m (177 ± 18 lb in).
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   Illustration 4	g01375864

4. Install flow control valve (14) into load control valve (1). Tighten flow control valve (14) to a torque of 95 ± 14 N·m (70 ± 10 lb ft).
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   Illustration 5	g01375861

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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.

5. Remove valve (10), spring (11), O-ring seal (12), and plug assembly (13) into load control valve (1).
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   Illustration 6	g01375860

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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.

6. Install poppet (2), poppet (3), retainer (4), spring (5), guide (6), spacers (7), O-ring seal (8), and plug (9) into load control valve (1).

End By:

1. Install the load control valve (boom cylinder).