Stump Grinder

1. Park the machine on a level surface.

2. Lower the loader arms.

3. Engage the parking brake (if applicable).

4. Shut off the engine and remove the key.

Parts needed for this procedure:

Parts needed for this procedure:

Parts needed for this procedure:

The stump grinder has 4 sets of mounting holes for positioning the chip guard (Figure 11). Move the guard up (upper holes) when you are grinding close to the ground and down (lower holes) when you are chipping tall stumps. Install the chip guard as follows:

1. Position the mounting tube on the guard between 2 holes on the grinder (Figure 11).

   

   Figure 11

   1. Guard pin
   2. Mounting holes
   3. Chip guard
   4. Mounting tube
   5. Hairpin cotter

2. Slide the guard pin through the holes in the grinder and the mounting tube (Figure 11).

3. Secure the pin with a hairpin cotter (Figure 11).

Refer to the Operator’s Manual for the traction unit for the installation and removal procedure.

Important: Before installing the attachment, position the machine on a level surface, ensure that the mount plates are free of any dirt or debris, and ensure that the pins rotate freely. If the pins do not rotate freely, grease them.

Note: Always use the traction unit to lift and move the attachment.

1. If your traction unit has a speed selector, move it to the SLOW position.

2. Start the engine.

3. Pull the auxiliary hydraulics lever to the operator grip to engage the stump grinder.

4. Position the grinder on the left side and behind the stump (Figure 13).

   Note: Many variables, such as the type of tree, age, size, amount of moisture, and condition, affect the required amount of time and effort to grind a stump.

   

   Figure 13

5. Swing the grinder toward you using the attachment-tilt lever, grinding at a depth of 0.5 to 5 cm (1/4 to 2 inches), depending on the hardness of the wood (Figure 13).

   Note: If you cut too deep, the grinder stalls. If it stalls, raise it slightly and try again.

6. Swing the grinder back out (Figure 13), lower it 0.5 to 5 cm (1/4 to 2 inches), and repeat steps 4 through 6 until you have ground down a few inches.

7. Raise the loader arms to the original height.

8. Move the grinder to the right (Figure 13).

9. Repeat steps 4 through 8 until you reach the right side of the stump.

10. Return the grinder to the left side of the stump, lower it, and repeat steps 3 through 10 until you have ground the stump into the ground.

    Note: To contain the chips, you may need to stop the grinder and move the chip guard up as you move the grinder down.

11. When finished, stop the grinder by moving the auxiliary hydraulics lever to the NEUTRAL position.

1. Stop the grinder and hang it vertically from the loader arms a few centimeters (inches) off the ground.

2. Shut off the engine and remove the key.

3. Loosen the large bolt on the top of the grinder (Figure 14).

   

   Figure 14

   1. Large bolt—loosen
   2. Front bolt—remove

4. Remove the front bolt and nut securing the grinder (Figure 14).

5. Swing the grinder 30 degrees clockwise (Figure 14).

6. Torque the large bolt on top of the grinder to 406 N∙m (300 ft-lb) as shown in Figure 14.

7. Install the bolt and nut in the front hole and torque them to 101 N∙m (75 ft-lb) as shown in Figure 14.

8. Start the traction unit and start the grinder.

9. Lower the grinder into the root.

10. Move the grinder along the length of the root by moving the traction unit over the root.

11. When finished, stop the grinder by moving the auxiliary hydraulics lever to the NEUTRAL position.

12. Shut off the engine and remove the key.

13. Loosen the large bolt on the top of the grinder (Figure 14).

14. Remove the front bolt and nut securing the grinder (Figure 14).

15. Swing the grinder 30 degrees counter-clockwise (Figure 14).

16. Torque the large bolt on top of the grinder to 406 N∙m (300 ft-lb) as shown in Figure 14.

17. Install the bolt and nut in the front hole and torque them to 101 N∙m (75 ft-lb) as shown in Figure 14.

When transporting the attachment, keep it as close to the ground as possible, no more than 15 cm (6 inches) above the ground. Tilt it rearward.

Figure 15

1. No more than 15 cm (6 inches) above the ground
2. Tilt the attachment rearward.

Place the attachment on a trailer or truck capable of carrying it. Securely tie it to the trailer or truck using tie straps appropriate for the weight of the attachment and for highway use.

Important: Remove the operator's shield before transporting the traction unit to avoid damage to the shield of the traction unit.

• Always use full throttle (maximum engine speed).

• Never transport the attachment with the loader arms raised. Keep the arms lowered and the attachment tilted up.

• If your traction unit has a speed selector (present on some wheeled traction units), set it to the SLOW (turtle) position.

• If your traction unit has a flow divider (present on some wheeled traction units), adjust it to approximately the 10 o’clock position.

Grease the fitting in Figure 16.

Figure 16

Grease Type: General-purpose grease

1. Park the machine on a level surface, lower the loader arms, and engage the parking brake (if applicable).

2. Shut off the engine and remove the key.

3. Clean the grease fitting with a rag.

4. Connect a grease gun to the fitting.

5. Pump grease into the fitting until grease begins to ooze out of the bearings.

6. Wipe up any excess grease.

Due to the high amount of wear placed on the teeth, you will need to rotate and replace them periodically.

Each tooth is indexed with 3 positions so that you can rotate it twice, exposing a new sharp edge before replacing the tooth.

Figure 17

1. Sharp tooth
2. Worn tooth

To rotate a tooth, loosen the nut securing the tooth (Figure 18). Push the tooth forward and rotate it one third of a turn, bringing an unused edge to the outside. Torque the nut securing the tooth to 37 to 45 N∙m (27 to 33 ft-lb).

Figure 18

(Your grinder's appearance may vary from that shown in the illustration)

1. Nut
2. Spacer
3. Tooth holder
4. Tooth

To replace a tooth, remove the nut securing the tooth to remove it, then install a new tooth and nut in the same position (Figure 18). Torque the nut securing the tooth to 37 to 45 N∙m (27 to 33 ft-lb).