Harper 5400, Operator'S Manual

Page: 19 / 38

Chipper/Shredder
R
R
Setting Clearance:
1. Remove safety shields covering the drive
pulley on the rotor shaft front.
2. Remove safety cover on rotor shaft rear
side.
3. Loosen screws on the rotor shaft pulley.
4. Loosen set screws on front and rear rotor
bearing lock collars.
5. Using a hammer and punch, tap the lock
collars opposite the direction of normal
rotation and remove.
6. Tap the end of the rotor shaft until the
necessary 1/16 to 1/8 clearance between
the knife and chipping block is obtained.
7. After clearance is set, replace lock collars
onto eccentric hub on bearings.
8. Rotate the lock collars in the direction of
the shaft rotation and set them with a
hammer and punch.
9. Using a straight edge, align rotor pulley
with the drive pulley and tighten to 17 FT
LBS. Set bushing with a punch and re-
torque.
10. Inspect and make sure all parts are
aligned and tight.
11. Close top half of drum housing, install
bolts and tighten. Replace grate pin in top
of grate assembly.
12. Make certain all bolts and fasteners are
tight and secure before replacing shields
and guards.
Shredder Knives
NOTE: The serrated shredder knives can be
rotated four times and re-sharpened.
Removal:
1. Remove the nine 5/16” bolts that fasten
the top and bottom housings together.
2. Remove the pin that fastens the top of the
grate and open hinged housing to access
drum housing.
3. Remove the #10-24 bolt and nut from the
knife shaft. Work with one shaft at a time
only; this will eliminate any confusion as
to proper spacing and alignment.
4. Remove the knife shaft, knives and
spacers, and reverse or replace desired
shredder knives.
Reversing or Replacing:
NOTE: Replace knives and spacers in the
same manner they are removed. (See Fig. 1)
This will eliminate improper balance and
misalignment of knives, which may cause
damage to the machine and void warranty.
1. Replace #10-24 bolt and nut through end
spacer and torque to the specified torque
value in the Standard Torque Chart.
2. Service all remaining knife shafts in this
manner.
3. Inspect and make sure all parts are
aligned and tight.
4. Close top half of rotor housing, install
bolts and tighten. Replace grate pin in top
of grate assembly.
5. Make certain that all bolts and fasteners
are tight and secure before operating.
NOTE: If unit is equipped with a Blower At-
tachment, you will need to remove the Blower
before reversing or replacing the shredder
knives.
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