Echo 76824 Owners Manual v.1 - Manual (Page 22)

PN 18280-00 R121505 20
SERVICE & MAINTENANCE
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE,
DISENGAGE THE HYDRAULICS AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
WARNING
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 rotor.
Remove large belt guard (three 5/16 inch bolts).
Loosen bolts that anchor the hydraulic pump to mount and
remove hydraulic belts.
Lift the engagement arm to disengage drive belt.
Using the push bolts from the bushing, remove the bushing and
pulley from the rotor shaft.
If a rotor bearing needs repair, it is best to remove the complete
rotor assembly from the chipper frame.
Using an overhead hoist or lifting device, remove the four 1/2
inch bolts on each rotor bearing and lift the rotor assembly
completely out of the frame. The complete rotor assembly
weighs 275 lbs.
Once the rotor assembly is out of the frame, both bearings on
the rotor assembly shaft can be removed by a puller and
replaced.
Use the overhead hoist or a lifting device to return the com-
plete rotor assembly to the chipper frame.
Install the four 1/2 inch bolts on each bearing to secure them
to the frame. Tighten bolts to 75 Ft-lb.
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2.
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5.
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7.
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10.
5.5 ROTOR BEARINGS
Slide rotor assembly forward to remove any existing play
in the assembly. Relocate the bushing and rotor sheave to
remove the play in the rotor assembly.
Replace drive belt on pulleys. Check alignment of pulleys
and adjust engine sheave if needed. Lower engaement arm
to engage belt.
Check belt tension before start-up (Section 5.4.2).
Replace the hydraulic belt and reinstall the hydraulic pump.
Adjust the hydraulic pump belt tension by sliding the hydraulic
pump in the mounting slots. Tighten bolts.
Check the alignment of pulleys using a straight edge and
adjust if needed.
Close rotor access cover and replace bolts.
Replace belt guard and resume operation.
Lift engagement arm, start engine, lower engagement arm
to engage belt, and test unit. Readjust pulleys and belt ten-
sion if needed.
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18.
It is extremely important to slide the rotor assembly forward
to remove any existing play in the rotor assembly. Failure to
do so could result in the chipper blades striking the chipping
anvil. This could result in serious injury or death.
WARNING
Figure 5.7- Rotor Bearings
DISK BEARINGS
DRIVE BELT
REAR GUARD
HYDRAULIC BELT