HF181, HF201, HF202, HF221 and HF222 Felling Heads Felling Head Caterpillar

Removal Procedure

Start By:

1. Ensure that the machine and the work tool is parked on a level surface prior to starting the following procedure. Ensure that the hydraulic lockout that is on the machine is in the LOCKED position.

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Accidental machine starting can cause injury or death to personnel working on the machine. To avoid accidental machine starting, turn the battery disconnect switch to the OFF position and remove the key. If the machine is not equipped with a battery disconnect switch, disconnect the battery cables from the battery and tape the battery clamps. Place a do not operate tag at the battery disconnect switch location to inform personnel that the machine is being worked on.

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

Note: Put identification 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.

1. The felling head should be in the vertical position.

2. Release the hydraulic pressure on the felling head. Refer to Disassembly and Assembly, "System Pressure - Release" for the machine that is being serviced.

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Illustration 1	g00757600

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Illustration 2	g00757604

3. Remove hydraulic hose assembly (1) and hydraulic hose assembly (7) from cylinder (2) for the accumulator arm.

4. Remove bolt (3) and the nut from pivot pin (4) on the rod end of cylinder (2) for the accumulator arm.

5. Remove pivot pin (4) from the felling head.

6. Remove bolt (6) and the nut from pivot pin (5) on the head end of cylinder (2) for the accumulator arm.

7. Remove pivot pin (5) from the felling head.

8. Use two people to remove cylinder (2) for the accumulator arm from the felling head. The weight of the cylinder for the accumulator arm is 32 kg (71 lb).

Installation Procedure

Start By:

1. Ensure that the machine and the work tool is parked on a level surface prior to starting the following procedure. Ensure that the hydraulic lockout that is on the machine is in the LOCKED position.

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Accidental machine starting can cause injury or death to personnel working on the machine. To avoid accidental machine starting, turn the battery disconnect switch to the OFF position and remove the key. If the machine is not equipped with a battery disconnect switch, disconnect the battery cables from the battery and tape the battery clamps. Place a do not operate tag at the battery disconnect switch location to inform personnel that the machine is being worked on.

1. The felling head should be in the vertical position.

2. Check for free movement in the accumulator arm prior to installation of the accumulator arm cylinder.

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Illustration 3	g00757604

3. Use two people to place cylinder (2) for the accumulator arm into the felling head. The weight of cylinder (2) for the accumulator arm is 32 kg (71 lb).

4. Install pivot pin (5) into the head end of cylinder (2) for the accumulator arm.

5. Install bolt (6) into pivot pin (5) .

6. Attach hydraulic hose assembly (7) to cylinder (2) for the accumulator arm.

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Illustration 4	g00757600

7. Install pivot pin (4) into the rod end of cylinder (2) for the accumulator arm.

8. Install bolt (3) and the nut into pivot pin (4).

9. Attach hydraulic hose assembly (1) to cylinder (2) for the accumulator arm.