H35E S, H35 S, H45E S, H45S, H55E S, H55S, H65E S and H65S Hydraulic Hammers Caterpillar

Disassembly Procedure

Start By:

1. Release hydraulic system pressure.

2. Remove the hydraulic hammer.

3. Remove the tool bushing.

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Illustration 1	g03479390

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Illustration 2	g03479400

1. Discharge the high-pressure accumulator. Remove plug (1) and the O-ring seal. Slowly loosen plug (2) until the dry nitrogen gas begins to escape, stop turning plug (2). When the discharge of the gas can no longer be heard, remove plug (2) and the O-ring seal .
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   Illustration 3	g03479456

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   Illustration 4	g03479461

2. Discharge the low-pressure valve body. Remove plug (3) and the O-ring seal. Slowly loosen plug (4) until the dry nitrogen gas begins to escape, stop turning plug (4). When the discharge of the nitrogen gas can no longer be heard, remove plug (4) and the O-ring seal .
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   Illustration 5	g03472296

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   Personal injury can result from air pressure against the valve body. The valve body can come off the head with force when applying air pressure. To prevent possible personal injury, the valve body must be retained to the head by bolts when applying air pressure.

3. Use Tooling (B) and a suitable lifting device to remove valve body (6). The weight of valve body (6) is approximately 29 kg (65 lb)

4. With bolts (5) backed out to approximately 25 mm (1.0 inch), use a suitable air gun and apply shop air to Port (X). Valve body (6) will separate from the head. Remove bolts (5) and valve body (6).

   Note: Make sure that all port holes are plugged to avoid oil spray from compressed air.

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Illustration 6	g03468298

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Illustration 7	g03468301

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Illustration 8	g03888670

1. Using Tooling (C) to remove seal carrier (7) from valve body (6). Remove seals (8) from seal carrier (7).
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   Illustration 9	g03442676

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   Illustration 10	g03888673

2. Using Tooling (A) and a suitable lifting device to remove piston (9).

3. Remove bushing (9A) from
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   Illustration 11	g03446164

4. Use a suitable lifting device to reposition the head assembly as shown. Refer to Table 2 for the approximate weight of the head assembly. Use Tooling (D) to remove sleeve assembly (10).
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   Table 2

   Sales Model	Head Assembly Approximate Weight
   H55E	45 kg (99 lb)
   H65E	62 kg (137 lb)

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   Illustration 12	g03468397

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   Illustration 13	g03888679

5. Remove membrane (11) from sleeve assembly (10). Remove seal assemblies (12) from sleeve assembly (10).

   Note: Do NOT remove tube (13) from sleeve assembly (10), the components are not individually serviced.