Echo Bear Cat 73554 - Manual (Page 31)

Page 28 Bearcat Chipper Shredder Operator’s Manual
Service & Maintenance
SETTING CHIPPING BLADE CLEAR-
ANCE
The chipping blades should clear the chipper block located
directly opposite the chipper chute intake by 1/16 inch to
1/8 inch. To adjust the blade clearance, proceed as follows:
1. Loosen and remove the 3/8” carriage bolt securing the
chipper top.
2. Open the chipper top cover exposing the chipper shred-
der compartment.
3. Remove the dust cover on the front side of the machine.
4. Remove the belt guards on the rear of the machine.
(PTO models, remove the joint shield first).
5. Loosen the set screws holding the lock collars on the
front and rear 2-bolt flange bearings.
6. Use a punch and hammer to to tap the lock collars
directly opposite of normal rotation. (On the Front side
tap punch in a CW rotation. On the Rear side tap punch
in a CCW rotation
7. Using a rubber mallet tap the end of the rotor shaft to
obtain 1/16” to 1/8” of an inch clearance. Rotate the
rotor and check the clearance on all chipping blades.
8. Once clearance has been set, the lock collars must be
replaced to retightened. Using a punch and a hammer,
rotate the lock collars in the direction of shaft rotation
(i.e. counte-clockwise on the rear bearing and clock-
wise on the front bearing) and "set" them with a positive
hammer tap. Tighten the lock collar set screws.
9. Loosen the set screws holding the belt pulley on the
rotor shaft. Move the pulley on the shaft so it is aligned
with the engine drive pulley (towable models) or PTO
drive pulley (PTO models). The pulley should be moved
an equal but opposite amount the rotor was moved.
10. Insure the pulley drive key is completely seated under
the pulley and tighten the set screws.
11. Check pulley alignment by laying a straight-edge across
the pulley faces. Pulley faces should line up if not,
determine which pulley to adjust and repeat alignment
check.
12. Replace the (joint shield PTO models only), belt guard
and plastic bearing cap.
CHIPPER
BLOCK
CHIPPER
BLADES
1/16" TO 1/8"
To prevent personal injury or property damage: Shut
off engine, disconnect spark plug wire, remove igni-
tion key, disconnect the PTO driveline from the source
providing power or disconnect the driveline from the
chipper shredder and make sure that all moving parts
have come to a complete stop, before, servicing, ad-
justing or repairing.
WARNING
Fig. # 11 Chipper blade clearance
WARNING
Guards and shields are removed for
illustrative purposes only; do not op-
erate without guards and shields in
place and functioning properly.