DR Power 11.5 FPT - Manual (Page 22)

22 DR ® CHIPPER/SHREDDER
Troubleshooting Table (Continued)
S YMPTOM P OSSIBLE C AUSE
The Engine runs but the
Rotor doesn’t rotate.  The Throttle Lever should be in the FAST (Rabbit) position to engage the Clutch.
 The Drive Belt is loose, off or broken. Reinstall, re-tension, or change Belt (refer to “Chapter
4: Maintaining the DR Chipper/Shredder”).
 Remove any built-up debris from the Chipper/Shredder Hopper Inlet(s) and Discharge Chute.
 The inner Shoes of the Clutch are worn and/or the Clutch Shoe Retaining Springs are weak or
broken. Change the Clutch (refer to “Chapter 4: Maintaining the DR Chipper/Shredder”).
Shredding and chipping
action seems too slow or
Rotor stalling.  The Engine speed is too slow causing the Belt to slip. Run the Engine at full throttle (Rabbit).
 Check for loose or damaged Drive Belt; tighten or replace.
 Check for a dull or damaged Knife; sharpen or replace the Knife. Check for a clogged
Shredder Screen, clean if necessary.
Belt frays or falls off
frequently.  The Drive Pulley or Clutch groove may be nicked. Check the Drive Belt for wear and hard
spots. File off any nicks on the Drive Pulley or Clutch.
 The Drive Belt may be stretched; readjust or replace it.
- Clutch overheats.
- Belt burns.
- Rotor won’t turn.
 Immediately stop the Engine and remove the Spark Plug Wire.
 Turn the Rotor with a wooden stick to be sure it turns freely.
 Check the Drive Belt tension.
 Remove any built-up debris from the Chipper/Shredder Hopper Inlet(s) and Discharge Chute.
The machine has
excessive vibration.  Check for a dull or damaged Knife; sharpen or replace the Knife.
 The Rotor is out of balance. Check the Rotor Assembly for any missing or broken Hammers
or Spacers; replace if necessary.
 The Knife may not be seated properly on the Rotor. Loosen the Knife mounting screws, reset
the Knife, and tighten the screws.
 If your machine still exhibits excessive vibration, visit our website at www.DRpower.com.
When chipping, the log
seems to vibrate
excessively and
“hammers” my hands.  The Knife is dull; sharpen or replace it.
Shut down the Engine, remove the Spark Plug Wire, and wait 5 minutes before performing any maintenance procedure or
inspection on the Chipper/Shredder.