SH-56B Felling Head Felling Head Caterpillar

Removal Procedure

Start By:

1. Remove accumulator arm spring.

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Illustration 1	g02651878

1. Attach a suitable lifting device to accumulator arm (1) . The weight of accumulator arm (1) is approximately 77 kg (170 lb). Remove nut (3) and pin assembly (2) .

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Illustration 2	g03082218

2. Remove bolt (7) and the nut. Remove nut (5) and pin (4) . Reposition cylinder (6) . Remove accumulator arm (1) .

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Illustration 3	g03080399

3. Remove sleeves (8) from accumulator arm (1) .

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Illustration 4	g03080597

4. Attach a suitable lifting device to lower arm (9) . The weight of lower arm (9) is approximately 82 kg (180 lb).

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Illustration 5	g03080016

5. Remove nut (10) and the washer from lower arm (9) .

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Illustration 6	g03080063

6. Remove nut (11) and the washer , bolt (12) , and pin assembly (13) . Remove lower arm (9) .

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Illustration 7	g03080067

7. Attach a suitable lifting device to upper arm (14) . The weight of upper arm (14) is approximately 82 kg (180 lb).

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Illustration 8	g03079879

8. Remove nut (15) and the washer .

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Illustration 9	g03080068

9. Remove nut (17) and the washer , bolts (18) , and plate (19) . Remove pin (16) .

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Illustration 10	g03080076

10. Remove sleeves (20) . Remove upper arm (14) .

Installation Procedure

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Illustration 11	g03080076

1. Position upper arm (14) . The weight of upper arm (14) is approximately 82 kg (180 lb). Lubricate bore and install sleeves (20) in upper arm (14) so that sleeves (20) are flush with the surface of the top and bottom plates.

   Note: Gently push the sleeves (20) into the upper arm (14) to not damage the seals.

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Illustration 12	g03080068

2. Lubricate pin (16) and install pin (16) into the sleeves (20) and upper arm (14) from the top.

3. Install plate (19) with the pin flats facing fore and aft. Loosely secure the plate (18) with three bolts (18) installed finger tight.

4. Install washer and the nut (17) .

   Note: Do not torque nut (17) at this time.

5. Torque bolts (18) to a torque of 100 ± 20 N·m (74 ± 15 lb ft).

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Illustration 13	g03079879

6. Install washer and the nut (15) . Tighten nut (15) to a torque of 450 ± 60 N·m (332 ± 44 lb ft).

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Illustration 14	g03079936

7. Torque nut (17) to a torque of 450 ± 25 N·m (332 ± 18 lb ft).

   Note: Ensure that the upper arm moves freely.

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Illustration 15	g03080063

8. Lubricate sleeve (20) (not shown) and install into lower arm (9) being sure that sleeve (20) moves freely in lower arm (9) . Position lower arm (9) . The weight of lower arm (9) is approximately 82 kg (180 lb).

9. Lubricate and install pin assembly (13) in lower arm (9) and frame.

10. Install pin assembly (13) with pin flats facing right and left.

11. Install bolt (12) hand tight to keep pin assembly (13) from falling down.

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Illustration 16	g03080016

12. Install nut (10) and the washer . Tighten nut (10) to a torque of 450 ± 60 N·m (332 ± 44 lb ft).

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Illustration 17	g03080279

13. Install washer and the nut (11) . Tighten nut (11) to a torque of 450 ± 60 N·m (332 ± 44 lb ft)

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Illustration 18	g03080597

14. Position lower arm (9) . The weight of lower arm (9) is approximately 82 kg (180 lb).

    Note: Ensure lower arm (9) moves freely.

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Illustration 19	g03080399

15. Lubricate sleeves (8) and gently install the sleeves (8) into accumulator arm (1) taking care not to damage seals.

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Illustration 20	g03080857

16. Position accumulator arm (1) . Lubricate and install pin assembly (2) being sure that the head of the pin assembly (2) seats into the recess machined in the top arm (14) .

17. Before installing nut (3) , pull the top (14) and bottom (8) arms together using a C-clamp. Periodically move the accumulator arm (1) back and forth while tightening clamp.

18. Use a pry bar or suitable lifting device in order to apply a vertical up force on the lower arm (8) ensuring the lower arm (8) is not bound to the pin assembly (13) .

19. Retighten C-clamp.

20. Install nut (3) and the washer . Tighten nut (3) to a torque of 45 N·m (33 lb ft).

21. Continue to tighten nut (3) to line cotter pin up with the next hole.

22. Install cotter pin so that the loop is recessed into nut.

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Illustration 21	g03082218

23. Position cylinder (6) . Lubricate and install pin (4) . Install bolt and nut (7) . Install nut (5) .

24. Tighten nut (5) to a torque of 200 ± 20 N·m (148 ± 15 lb ft).

End By: Install accumulator arm spring.