HF181, HF201, HF201B, HF202, HF221 and HF222 Felling Heads Caterpillar

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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.

Inspect

1. Remove the saw guard.
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   Illustration 1	g00938945

2. Inspect each bolt (2) for cracks, damage or excessive wear. Replace any bolts that are damaged or worn. Check the torque of each bolt. Tighten bolts to a torque of 405 ± 40 N·m (300 ± 30 lb ft).

   Note: Bolts must be replaced at every 1000 service hours.

3. Inspect each tooth (1) for cracks, damage or excessive wear. Replace teeth that are damaged or worn.

Replace

1. Loosen bolt (2).

2. Tap bolt head (2) until tooth (1) has moved outward.

3. Remove bolt (2) and tooth (1) from the disc saw.

4. Ensure that all mating surfaces are clean and free of burrs.

5. Check for clearance. The tooth must be seated tightly against the disc saw.

6. Install tooth (1) into the disc saw with bolt (2). Tighten bolt (2) to a torque of 405 ± 40 N·m (300 ± 30 lb ft).

   Note: Use a new bolt when you replace a tooth.

7. Install the saw guard.

Reference: For more information, refer to Operation and Maintenance Manual, "Disc Saw Tooth - Inspect/Replace".