Echo 76824 Owners Manual v.2 - Manual (Page 30)

PN 18280-00 R041306 28
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 DIsk bEARINgs
5.8.2 chIppER bELT 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.
Lift engagement handle to disengage drive belt.
Loosen bolt on engine tie. DO NOT REMOvE.
verify the belt tensioning bolts on the engine mount plate are
tight against the engine mount.
Turn each of the two bolts eight revolutions counterclock-
wise.
Loosen the four engine mount bolts and slide engine towards
chipper housing.
Remove the drive belt from the disk shaft pulley.
Remove the bolts attaching the pulley bushing to the pul-
ley.
Install the bushing push bolts and tighten alternately one flat
at a time to remove the bushing from the pulley.
Remove the pulley and the pulley bushing.
Loosen the bearing spacer bolt and remove the bearing
spacer.
Loosen the two bearing set screws.
Remove four bearing mounting bolts and proximity sensor
bracket.
Remove bearing and install new bearing with grease zerk
facing engine.
Install the four bearing mounting bolts with washers through
the proximity sensor bracket, bearing, bearing mount bracket
and frame. Torque to 75 ft lb.
Tighten the two bearing set screws.
Install the bearing spacer tight against the bearing and lock
in place.
Adjust the proximity sensor to within 1/32” to 1/16” from
bearing spacer bolt head.
Place pulley bushing on shaft.
Place pulley on bushing.
Align pulley with engine pulley using a straight edge.
Alternately tighten bushing bolts 1 flat at a time.
Install drive belt on pulley.
Install large idle pulley if previously removed.
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Replacing disk bearings should be only performed by a qualified service technician.
Lower engagement handle to engage drive belt.
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 7/16” when a 20 lb load is placed against the
belt (figure 5.5)
Check pulley alignment using a straight edge and adjust the
appropriate belt tension screw if required.
Tighten the four engine mount bolts to the appropriate
torque.
Tighten engine tie bolt.
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.
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The large idler pulley may need to be removed for easier
removal of the drive belt.
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