Echo CH8720iH Owners Manual v.1 - Manual (Page 25)

21 8 INCH TURNTABLE CHIPPER
ENGLISH
SERVICE & MAINTENANCE
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.
WARNING
5.11.1 chiPPer BlaDe siDe BearinG
1. Remove the two 3/8" retaining bolts holding the access
cover to the main frame assembly.
2. Tilt access cover over to allow access to disk.
3. Raise feed roller to allow removal of bearing cap.
Option 1
• Disconnect feed roller springs.
• Connect hoist to top feed roller spring eyebolts.
• lift feed roller assembly to allow clearance to bearing
cap.
• Block feed roller to prevent falling.
Option 2
• Fully collapse the feed roller lift jack.
• Screw the hydraulic jack center shaft out until it again
touches the bottom of the feed roller plate.
• Fully extend jack to raise feed roller mechanism.
• Block feed roller to prevent falling.
4. Remove bearing cap and bearing lock.
5. loosen both bearing set screws.
6. Remove four bearing mounting bolts.
Orientation of bearing lock hole in lock is not centered
in bracket.
noTe
5.11.2 chiPPer BelT siDe BearinG
1. Remove the two 3/8" retaining bolts holding the access
cover to the main frame assembly.
2. Tilt access cover over to allow access to disk.
3. lift engagement handle to disengage drive belt.
4. loosen bolt on engine tie. DO NOT REMOVE.
5. Verify the belt tensioning bolts on the engine mount
plate are tight against the engine mount.
6. Turn each of the two bolts eight revolutions
counterclockwise.
The large idler pulley may need to be removed for eas-
ier removal of the drive belt.
noTe
5.11 DisK BearinGs
Replacing disk bearings should be only performed by a
qualified service technician.
7. Remove bearing and install new bearing with grease
zerk facing away from engine towards hinge side of
rotor cover.
8. Install the four bearing mounting bolts with washers
through the bearing, bearing mount bracket and frame.
Torque to 75 ft lb.
9. Install the bearing lock.
10. Verify that there is no shaft end play.
11. If there is no shaft end play, proceed to Step 14.
12. If end play is detected:
• loosen bearing spacer on belt side bearing.
• loosen both belt side bearing set screws.
• Drive shaft towards belt side.
• Push belt side bearing spacer tight against
bearing and lock in place.
• Tighten belt side bearing set screws.
13. Tighten blade side bearing set screws.
14. Install the bearing cap with grease zerk facing towards
hinge side of rotor cover.
15. Remove blocking from feed roller
16. lower feed roller assembly and, depending on lift
method used, reinstall springs or screw hydraulic jack
center shaft down.
17. Verify blade to anvil clearance is 1/16 to 1/8” on all
blades.
18. Tilt access cover over disk.
19. Replace the two 3/8 inch retaining bolts holding
the access cover to the main frame assembly and
tighten.
5.10.3 aDjusTinG Drive BelTs
1. lower the engagement handle
2. loosen bolt on engine tie. DO NOT REMOVE.
3. Verify the belt tensioning bolts on the engine mount
plate are tight against the engine mount.
4. loosen the four engine mount bolts.
5. Alternately turn each of the belt tension bolts clockwise
an equal number of turns until the belt deflection at the
center of the belt is around 7/16” when a 20 lb load is
placed against the belt.
6. Check pulley alignment using a straight edge and adjust
the appropriate belt tension bolt if required.
7. Tighten the four engine mount bolts to the appropriate
torque
8. Tighten the engine tie bolt
9. lift the engagement handle, start engine and lower
engagement handle to test units. Adjust pulleys and
belt tension as needed.