Echo 73413 Owners Manual v.3 - Manual (Page 21)

4 INCH CHIPPER 17
ENGLISH
SERVICE & MAINTENANCE
WARNING
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE AND MAKE SURE
ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
Figure 5.6, Belt tension
5.7 REpLaCING RoToR bEaRINGS
5.7.1 REpLaCING ENGINE modEL bEaRINGS
1. Remove the 3/8' retaining bolt holding access cover to
main frame assembly. Tilt access cover over to allow
rotor access.
2. Remove large belt guard.
3. Depress belt engagement pedal, loosen engine bolts and
slide engine to loosen belt tension. then remove drive
belt from pulleys. using the push bolts from the bushings,
remove the bushings and pulleys from the rotor shaft.
4. Remove the two 1/2" bolts on each rotor bearing and
remove the roll pin from the rotor shaft.
5. using an overhead hoist or lifting device, lift the rotor
assembly completely out of the frame. The complete
rotor assembly is 140 lbs.
6. Once the rotor assembly is out of the frame, remove
both bearings and place new bearings on shaft.
7. Replace roll pin.
8. use the overhead hoist or lifting device to return the
complete rotor assembly to the chipper frame.
9. Slide rotor back until the roll pin is tight against the front
bearing. lock the front bearing and install the 1/2" bolts
on each bearing to secure them to the frame. Tighten
bolts to 75 ft-lbs. lock rear bearing. Check and adjust
chipper anvil if needed.
10. Slide bushing onto shaft with flange against bearing
and lock bushing to shaft. Attach large pulley to
bushing. Replace drive belts on pulleys, slide engine
back into place, and retighten bolts. Check alignment
of pulleys and belt tension. Adjust if needed.
11. Replace belt guard and resume operation.
12. Start engine, engage drive belt, and test unit. Adjust
pulleys and belt tension if needed.
5.7.2 REpLaCING pTo modEL bEaRINGS
1. Remove the 3/8" retaining bolt holding access cover to
main frame assembly. Tilt access cover over to allow
rotor access.
2. Remove large belt guard.
3. Remove idler pulley and drive belts. using the push
bolts from the bushing, remove the bushing, spacer
and pulley from the rotor shaft.
4. Remove the two 1/2" bolts on each rotor bearing and
remove the roll pin from the rotor shaft.
5. using an overhead hoist or lifting device, lift the rotor
assembly completely out of the frame. The complete
rotor assembly is 140 lbs.
6. Once the rotor assembly is out of the frame, remove
both bearings and place new bearings on shaft.
7. Replace roll pin.
8. use the overhead hoist or lifting device to return the
complete rotor assembly to the chipper frame.
9. Slide rotor back until the roll pin is tight against the front
bearing. lock the front bearing and install the 1/2" bolts
on each bearing to secure them to the frame. Tighten
bolts to 75 ft-lbs. Check and adjust chipper anvil if
needed. lock rear bearing.
10. Slide spacer and bushing onto shaft with flange against
bearing and lock bushing to shaft. Attach rotor pulley to
bushing. Replace drive belts and reinstall idler pulley. Check
alignment of pulleys and belt tension. Adjust if needed.
11. Replace belt guard and resume operation.
12. Start tractor engine and engage PTO drive clutch (see
tractor owner's manual). Increase engine speed to
rated PTO RPM Position. Test unit; readjust pulleys
if needed.
4. Install the new belts and reinstall idler pulley.
5. Check pulley alignment with a straight edge and adjust
if needed.
6. Check belt tension and adjust if needed. The belt
deflection at the center of the belt should be 7/16" when
a 20 lb. load is placed against it (see Figure 5.6).
7. Reinstall belt guard.
8. Start tractor engine and engage PTO drive clutch (see
tractor owner's manual). Increase engine speed to rated
PTO RPM. Test unit and adjust pulleys if needed.
5.8 CLEaRING a pLuGGEd RoToR
1. Shut off power source and allow all moving parts to
come to a complete stop.
2. Remove the retaining bolt holding the access cover to
the main frame assembly and lift up access cover.
3. Clean the debris out of the chipping rotor. Turn the rotor
by hand to be sure it is free to rotate.
4. Close rotor access cover and replace bolt.
5. Start engine and engage drive belt to resume
operation.
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION