DR 11.5 Chipper Shredder, Safety & Operating Instructions Manual

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23
7. Reinstall the parts, but with the orientation of the Hammers flipped to a
clean cutting edge. If your Hammer Shaft assembly looked like
Figure 30
before then it should look like
Figure 31
after. Or vice versa.
8. Reinstall the Screw and locknut through the Spacer and the Hammer Shaft.
Make sure the Locknut is fully tightened.
9. Repeat steps 4 through 9 for the other three sets of Hammers. Confirm that
Hammer orientations alternate as shown in Figure 29. Correct them if
needed.
10. Reposition and secure the Access Plate.
11. Rotate the Screen back into the operating position and reinstall the
hardware.
Note:
Make sure the bolt goes through the screen rather than just
behind it ..
Removing and Replacing the Clutch
The design of the Clutch on your machine is for rugged, dependable service, however, it is important to understand the limitations
of a Clutch. The Clutch design is to provide load free starting of the Engine, and slippage under excessive overloading of the
driven application. These features help protect the Engine from damages such as broken crankshafts and starters (electric start
machines). The Clutch on this machine is permanently lubricated and does not require oil or grease. The Clutch is a normal wear
item. If, after long periods of use, the Drum wobbles excessively, or if you notice decreased performance of the Clutch, replace it.
The Clutch obtains its power from the Engine RPM. The lower the engagement speed, and the higher the maintained Engine
speed, the more torque the Clutch can transfer to the driven unit.
NEVER operate the DR CHIPPER SHREDDER Engine at less
than full RPM.
Tools and Supplies Needed:

Two 1/2" Wrenches

9/16" Wrench

Dead Blow Hammer

Anti-seize compound
1. Remove the Belt as described in the “Replacing The Belt” section in this
Chapter.
2. Place a 9/16" Wrench onto the Clutch Bolt and rotate the Wrench
counterclockwise until you feel some resistance (
Figure 32
).
3. Hit the Wrench sharply with a Dead Blow Hammer to start the Bolt turning
on the Engine Shaft.
4. Remove the Bolt, Flat Washer, Clutch and Key from the Engine Shaft.
5. Clean the Engine Crankshaft and remove any burrs, then apply anti-seize
compound to the Crankshaft.
6. Install the Key in the Keyway of the Engine Crankshaft, align the Key with the
slot in the new Clutch Hub, and then slide the new Clutch Assembly onto the
Crankshaft followed by the Washer and Clutch Bolt. Tighten the Bolt
securely using the same method as removal.
7. Reinstall the Drive Belt and set the Belt tension as described in the
“Replacing the Belt” section.
8. Reinstall the Belt Cover.
Clutch
Figure 32
Bolt and
Washer
Figure 31
Flat
Hammer
Spacer
With
Hole
Screw and
Locknut
Hammer
Shaft
Plain
Spacers
J Hammer
J Hammer