Powerhorse M16620D, Owner'S Manual

Page: 27 / 44

Maintenance and Repair
27
2. Shredding Hammers/Knives
There are four shafts attached to the flywheel. Each shaft has 5 hammers/knives. As the large
spinning wheel rotates, the hammers/knives rotate and pulverize the shreddable material. The
material is broken down and passes through the shredding screen and exits the machine. Routinely
inspecting the hammers/knives and shredder screen for damage will ensure the shredder is operating
correctly. Operating with a worn or damaged hammers/knives or shredder screen will cause extreme
stress and vibration to the machine and make shredding less efficient.
The shredding hammers/knives life is relative to what they shred. Non-shreddable items like wood
or rocks that enter the shredder will shorten the life of the hammers/knives and shredder screen.
Hammers/knives should be checked for damage before each use. They should be turned or changed
as necessary. Damaged hammers/knives:

Cause excessive fuel consumption.

Cause unnecessary stress and strain on the machine.

Reduce the production rate.
Changing or Turning Shredding Hammers/Knives
Shredding
Hammers and
Knives

Disconnect spark plug wire


Remove shredder hopper and chipping chute.


Use punch and hammer to remove spring pin from end of shaft.


Slide shaft out through chipping chute hole.


Turn or replace hammers/knives.


Re-install shaft through hammers/knives and spacers.


Secure shaft by re-installing the spring pin.


Repeat for remainder of shafts.
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