26
6 INCH CHIPPER
SERVICE & MAINTENANCE
WARNING
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE, DISENGAGE THE
HYDRAULICS, OPEN SHIELD AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
Figure 5.9, Replace Hydraulic Drive Belt
5.11.2 HYDRAULIC DRIVE BELT
The condition of the hydraulic drive belt should be checked
annually, or after every 25 hours of operation. Replace
the belt if it is cracked, worn, frayed, or stretched.
To replace the belt:
1. Remove drive belt according to instructions in
Section 5.11.1.
2. Loosen the four bolts between the pulley and pump.
3. Slide the pump up, remove the loosened hydraulic
belt and discard.
4. Install the new hydraulic belt.
5. Replace the drive belt according to directions in
Section 5.11.1.
6. Push the pump down to apply tension. Tighten the
four bolts loosened in step 2.
5.12 ROTOR BEARINGS
1. Remove the two 3/8" retaining bolts holding the
access cover to the main frame assembly.
2. Open access cover to allow access to rotor.
3. Follow Section 5.11.1 to remove drive belt.
4. Remove the bolts attaching the pulley bushing to the
pulley.
5. Install the bushing push bolts and tighten alternately
one flat at a time to remove the bushing from the
pulley.
6. Remove the pulley and the pulley bushing.
7. Remove bearing cap and bearing lock.
8. Loosen both bearing set screws on each bearing.
9. Remove four bearing mounting bolts on each bearing.
10. Lift rotor out of chipper housing.
11. Remove bearings and install new bearings with
grease zerks. Reinstall shims.
12. Install the eight bearing mounting bolts through the
bearing and chipper housing. Torque to 75 ft-lbs.
13. Verify that there is no shaft end play.
14. Install the bearing locks.
15. Tighten bearing set screws.
16. Verify blade to anvil clearance is 1/16" to 1/8" on all
blades.
17. Place pulley bushing on shaft.
18. Place pulley on bushing.
19. Align pulley with engine pulley using a straight edge.
20.
Alternately tighten bushing bolts one flat at a time.
21. Follow instructions in Section 5.11.1 to reinstall belt.
22. Close access cover.
23. Replace the two 3/8" retaining bolts holding the
access cover to the main frame assembly and tighten.
Figure 5.8, Guide for Routing Belts
