320D3 Hydraulic Excavator Machine Systems Caterpillar

Load Control Valve (Stick Cylinder) - Assemble

Usage:

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	6V-7981	Bolt (M10×1.5×70mm)	2

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Do not use Wiping cloths or rags to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. All disassembly and all assembly procedures must be performed on a clean work surface and in a clean hydraulic area. Keep cleaned parts covered and protected.

Note: Check O-ring seals, gaskets, and seals for wear or for damage. Replace O-ring seals, gaskets, and seals, if necessary.

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Illustration 1	g06310553

Install O-ring seal (42) onto plug (40).
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Illustration 2 g06310552
Install plug (40). Tighten plug (40) to a torque of 10 ± 1 N.m (89 ± 9 lb in).
Install O-ring seals (39) and (41) onto the valve body.
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Illustration 3 g06310550
Install plug (38). Tighten plug (38) to a torque of 35 ± 4 N·m (26 ± 3 lb ft).
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Illustration 4 g06310263

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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 (37) onto body (36).
Install O-ring seal (33) and backup rings (34) onto valve (32).
Install O-ring seal (26), backup rings (27), and O-ring seal (28) onto body (25).
Install O-ring seal (22) onto screw (21).
Install valve (35), valve (32), plunger (31), spring (30), spring (29), body (25), plunger (24), spring (23), screw (21), and nut (20) into body (36). Tighten body (25) to a torque of 101 ± 10 N.m (74 ± 7 lb ft). Tighten nut (20) to a torque of 19.6 ± 2.0 N.m (173.5 ± 17.7 lb in).
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Illustration 5 g06310256
Install relief valve (19) into the valve body. Tighten relief valve (19) to a torque of 95 ± 14 N·m (70 ± 10 lb ft).
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Illustration 6 g06310254

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Illustration 7 g06310252
Install O-ring seal (18) onto plug (17).
Install plug (17). Tighten plug (17) to a torque of 40 ± 7 N.m (30 ± 5 lb ft).
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Illustration 8 g06310249
Install spool (14), guide (15), and spring (16) into the valve body.
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Illustration 9 g06310240

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Illustration 10 g06310239
Install O-ring seal (13) onto plug (12).

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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 plug (12). Tighten plug (12) to a torque of 50 ± 7 N·m (37 ± 5 lb ft).
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Illustration 11 g06310238

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Illustration 12 g06310234
Install O-ring seal (11) onto plug (10).
Install plug (10). Tighten plug (10) to a torque of 10 ± 1 N.m (89 ± 9 lb in).
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Illustration 13 g06310233
Install spool valve (8) and spring (9) into the valve body.
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Illustration 14 g06310231
Lubricate backup ring (7) and O-ring seal (6) lightly with the lubricant that is being sealed. Install backup ring (7) and O-ring seal (6) onto cover (5).
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Illustration 15 g06310227

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Illustration 16 g06310224

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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.
Use Tooling (A) to install cover (5). Install two bolts (4) and remove Tooling (A). Install remaining two bolts (4). Tighten bolts (4) to a torque of 55 ± 10 N.m (41 ± 7 lb ft).
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Illustration 17 g06310223
Install O-ring seals (3) and (2) onto the fittings.
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Illustration 18 g06310217
Install fittings (1).