Echo 76824 Owners Manual v.2 - Manual (Page 29)

PN 18280-00 R041306 27
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
5.8.1 chIppER bLADE sIDE bEARINg
Remove the two 3/8 inch retaining bolts holding the access
cover to the main frame assembly.
Tilt access cover over to allow access to disk.
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 bear-
ing 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.
Remove bearing cap and bearing lock.
Loosen both bearing set screws.
Remove four bearing mounting bolts.
Remove bearing and install new bearing with grease zerk
facing away from engine towards hinge side of rotor cover.
Install the four bearing mounting bolts with washers through
the bearing, bearing mount bracket and frame. Torque to
75 ft lb.
1.
2.
3.
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4.
5.
6.
7.
8.
Install the bearing lock.
verify that there is no shaft end play.
If there is no shaft end play, proceed to Step 14.
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.
Tighten blade side bearing set screws.
Install the bearing cap with grease zerk facing towards hinge
side of rotor cover.
Remove blocking from feed roller
Lower feed roller assembly and, depending on lift method
used, reinstall springs or screw hydraulic jack center shaft
down.
verify blade to anvil clearance is 1/16 to 1/8” on all blades.
Tilt access cover over disk.
Replace the two 3/8 inch retaining bolts holding the access
cover to the main frame assembly and tighten.
9.
10.
11.
12.
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14.
15.
16.
17.
18.
19.
20.
5.8 DIsk bEARINgs
Replacing disk bearings should be only performed by a qualified service technician.
Orientation of bearing lock hole in lock is not centered in
bracket.
NoTE