631E Series II Wheel Tractor-Scrapers Caterpillar

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Personal injury or death can result, if the bowl is not blocked up. Block the bowl before changing router bits.

Note: Any material that might fall on the worker should be removed from the bowl area.

Replace the router bits if the router bits are worn or damaged. One router bit is on each side of the bowl.

1. Park the machine on level ground.

2. Raise the bowl and block up the bowl. Block the bowl on both sides. Blocks should be of material that is suitable for carrying the weight of the bowl. Only block up the bowl to a sufficient height for the removal of the router bits.

3. Block the apron. Refer to Operation and Maintenance Manual, "Blocking the Apron and Bowl" for information on blocking the apron.

4. Shut off the engine. Engage the parking brake. Release the hydraulic pressure on the hydraulic cylinders.
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   Illustration 1	g00442403

5. Remove the bolts and remove the router bits (1).

6. Clean the contact surfaces.

7. Use the opposite side of the router bits if the opposite side of the router bits are not worn. Move the right side router bit to the left side of the bowl. Move the left side router bit to the right side of the bowl.

8. Install new router bits if both of the sides of the router bits are worn.

9. Install the bolts for the router bits and tighten the bolts to the specified torque.

10. Start the engine. Raise the apron and remove the pin assembly from the pin holder. Lower the apron and return the pin assembly to the pin's storage location.

11. Raise the bowl. Remove the supporting block. Lower the bowl to the ground. After a few hours of operation, check the bolts for proper torque.