Echo CH6614 Owners Manual v.1 - Manual (Page 23)

6 INCH CHIPPER 21
SERVICE & MAINTENANCE
6.7 greaseable bearings
The 71620 and 72620 models have five grease zerks on
them. Minimal periodic greasing is needed on these points
every 50 hours:
• Two bearings on the rotor shaft.
• One bushing on the belt engagement pedal pivot.
• One grease zerk on idler pivot.
• One grease zerk on discharge chute.
imPorTanT
Every 8 hours of operation, check the bolts on the
following for correct torque:
• Hydraulic feed roller bearing
• Hydraulic motor mounting
• Chipper rotor bearing
• Chipper blades
• Rotor paddles
• Chipper anvil
cauTion
Failure to maintain proper fastening torque on bolts
for the components listed above may result in severe
damage to the chipper and/or personal injury!
6.6 rePlacing bearings
1. Remove the two 3/8 inch retaining bolts holding access
cover to main frame assembly. Tilt access cover over
to allow rotor access.
2. Remove large belt guard.
3. loosen bolts on hydraulic pump and remove hydraulic
pump belt (for hydraulic feed units only).
4. 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.
5. Remove the four 1/2 inch bolts on each rotor bearing
and remove the punch used to lock the rotor.
6. using an overhead hoist or lifting device, lift the rotor
assembly completely out of the frame. The complete
rotor assembly is 275 lbs.
7. Once the rotor assembly is out of the frame, remove
3/8" bolts and collar from front. Remove both bearings
and place new bearings on rotor shaft. Replace col-
lar.
8. use the overhead hoist or lifting device to return the
complete rotor assembly to the chipper frame.
9. Slide rotor back until the front collar is tight against
the front bearing. lock the front bearing and install the
four 1/2 inch 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 rear collar on shaft against rear bearing. Slide
bushing onto shaft with flange against collar 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 hydraulic pump belt. Readjust hydraulic pump
belt tension by sliding the hydraulic pump in the mount-
ing slots. Tighten bolts.
12. Replace belt guard and resume operation.
13. Depress belt engagement pedal, start engine, engage
drive belt, and test unit. Readjust pulleys and belt ten-
sion if needed.