TK711, TK721, TK722 and TK732 Track Feller Bunchers Machine Systems Caterpillar

Removal

Start By:

1. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "System Pressure - Release".

2. Remove the stick. Refer to Disassembly and Assembly, "Stick - Remove".

Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.

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. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

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Illustration 1	g01025505

1. Remove bolts (1) and remove belt (2). Remove bolts (3) and remove plate (4).
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   Illustration 2	g01025524
   View of area behind belt (2) that was removed in the previous step

2. Remove clips (5) and disconnect four hose assemblies (6) that supply grease to the boom.
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   Illustration 3	g01025638

3. Disconnect hose assembly (7) from the filter. Disconnect hose assemblies (8) from the main hydraulic control valve.
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   Illustration 4	g01025612

4. Disconnect harness assembly (12). Remove bolts (10) that retain bracket (11). Remove bracket (11) and position hose assembly (9) out of the way.
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   Illustration 5	g01025753

5. Attach a suitable lifting device to boom (13), as shown. Support the boom by using the lifting device.
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   Illustration 6	g01025828

6. Attach a suitable lifting device by using Tooling (A) to the boom cylinder (14), as shown. Slightly raise boom (13) in order to relieve pressure from boom cylinder (14). Remove bolt (14A) and remove pin assembly (14B). Use Tooling (A) in order to lower the rod end of boom cylinder (14). Completely lower the rod end of the boom cylinder.
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   Illustration 7	g01025831

7. Remove coolant reservoir (15). Remove bolt (16).
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   Illustration 8	g01025851

8. Remove bolts (17) and remove engine valve cover (18).
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   Illustration 9	g01025853

9. Remove oil filler cap (19). Remove bolt (21) that holds clip (22). Slide clip (22) toward the valves. Make sure that valves (20) are in the closed position. This is necessary in order to provide clearance for Tooling (B) that will be used in the next step.
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   Illustration 10	g01025862

10. Place protective cover (23) over the exposed cylinder head valves, as shown. Use Tooling (B), (C), (D) and (E) in order to remove the pin assembly from the boom. Remove the pin assembly and remove the boom. The weight of the boom is approximately 1360 kg (3000 lb). The weight of the pin assembly is approximately 56 kg (125 lb). The weight of Tooling (B), (C), (D) and (E) is approximately 165 kg (360 lb).

Remove the Boom Bearings and Seals and Install the Boom Bearings and Seals

Removal

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Illustration 11	g01025944

1. Remove seal (1). Remove the bearing.

Installation

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Illustration 12	g01025953

1. Install the bearings by using Tooling (A), (B) and (C) (not shown), as shown. Install the seal by using Tooling (D).