303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems Support (Swing Boom) - Remove Caterpillar

Removal Procedure

Start By:

1. Remove the boom cylinder. Refer to, "Boom Cylinder - Remove and Install".

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes in order to prevent fluid loss and to keep contaminants from entering the system.

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Illustration 1	g01233687

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Illustration 2	g01233711

1. Disconnect hose assemblies (2) from tube assemblies (1) that are located at the rear of the boom. All hose assemblies (2) and tube assemblies (1) should be capped and the caps should be tight.

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Illustration 3	g01233691

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Illustration 4	g01233692

2. Attach Tooling (B) and a suitable lifting device to boom assembly (3). The weight of boom assembly (3) is approximately 522 kg (1150 lb).

3. Remove bolt (5) and pin assembly (4). Remove boom assembly (3) .

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Illustration 5	g01233694

4. Remove bolt (8) and pin assembly (7). Position swing boom cylinder (6) to the side.

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Illustration 6	g01233696

5. Remove bolts (9) and guard (10) .

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Illustration 7	g01233708

6. Install pin assembly (4) and bolt (5) that held the head end of the stick cylinder. Pin assembly (4) is used for the removal of support (11). Attach a suitable lifting device to pin assembly (4) and support (11). The weight of support (11) is approximately 160 kg (350 lb).

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Illustration 8	g01233709

7. Remove bolts (13) and (14). Remove pins (12) and (15) .

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Illustration 9	g01233790

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Illustration 10	g01233792

8. Pull hose assemblies (16) and (17) out of support (11) .

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Illustration 11	g01233793

9. Use Tooling (B) in order to remove retaining ring (18) that secures lower hitch pin (19) .

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Illustration 12	g01233814

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Illustration 13	g01233818

10. Drive upper hitch pin (20) downward onto lower hitch pin (19) that was referenced in the previous step. Use upper hitch pin (20) in order to drive lower hitch pin (19) out of the machine. Drive upper hitch pin (20) downward through the bore of the lower hitch pin (19). Upper hitch pin (20) and lower hitch pin (19) should be removed from the bottom of the machine.

    Note: Note the location of each hitch pin. Upper hitch pin (20) is longer than lower hitch pin (19) .

11. Remove support (11) from the machine. Note the location of any shims (21) that may be present.

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Illustration 14	g01234191

12. Use Tooling (C) in order to remove bearings (22) .

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Illustration 15	g01234210

13. Use Tooling (D) in order to remove bearings (23) .