26
DR
®
PRO-XL CHIPPER SHREDDER
Knife Sharpening
You should never attempt to sharpen the Chipper Knife freehand; take the Knife to a machine shop for proper
sharpening.
It is extremely important to consistently maintain the 45-degree angle for proper performance.
Excessive heat generated during the sharpening process will damage Knives and weaken the metal.
How many times a Knife can be sharpened is determined by how much material needs to be taken off to sharpen or to
compensate for dents or gouges.
A new Chipper Knife has a 5/16" measurement between the short side bevel edge and the Knife mounting holes (
Figure
37
).
The Knife should never be sharpened to the extent that more than 3/32" is taken off this measurement.
Once this measurement is below 7/32" (
Figure 38
), or if you are unable to remove dents or gouges with these
guidelines, replace the Knife.
Adjusting the Shredder Hammers
When the hard steel Hammers of the Rotor Assembly become dull or round on
the cutting edge, they may be rotated (side to side) or reversed (end to end),
to expose a new cutting edge.
Note:
The Hammers have four cutting edges that may be used before replacement
is necessary
(Figure 39)
. To rotate or reverse the Hammers, proceed as follows:
Tools and Supplies Needed:
Retaining Ring Pliers
Two 7/16" Wrenches
Two 9/16" Wrenches
3/8" Wrench
Marker or Tape
Vise Grips
Figure 37
New Knife
Short Side Beveled Edge
Knife Mounting Hole
5/16"
5/16"
Figure 38
Sharpened Knife
Short Side Beveled Edge
Knife Mounting Hole
7/32"
7/32"
Figure 39
Edge 1
Edge 2
Edge 3
Edge 4
