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23
Check and Adjusting the Knife to Wear Plate Gap
When you replace the Knife, check and set the clearance between the Knife and
Wear Plate. Use the Gap Gauge provided with your machine to set this
clearance to 1/16" (
Figure 28
). If the gap between the Wear Plate and the Knife
is not set correctly, you will have excessive vibration when chipping and the
Knife will seem to be dull. The Wear Plate should have a square edge and be free
of dents or gouges. The Wear Plate can be hand filed to square the edges. Be
careful not to overheat it during the sharpening process as this will change the
characteristics of the steel and you will then have to replace the Wear Plate.
Tools Needed:
Two 5/16" Wrenches
9/16" Wrench
Stick
Gap Gauge (provided with machine)
1.
To prevent accidental Starter engagement, disconnect the Battery Negative
Terminal using two 5/16" wrenches.
2.
You can gain access to the Chipper Knife and Wear Plate By tucking the
Blowback Shield between the Shredder Hopper and the Chipper Hopper
(Figure 29)
3.
Using a stick, rotate the Chipper Disk until the Knife is opposite the Wear
Plate
(Figure 30)
.
4.
Slide the Gap Gauge between the Knife and Wear Plate. If the gap is set
correctly, the Gap Gauge will lightly touch both the Knife and Wear Plate. If
the gap is too small, you will not be able to get the Gauge between the Knife
and Wear Plate. If the gap is too large, there will be excess room between
Gap Gauge, Knife, and Wear Plate.
5.
To adjust the Wear Plate Gap:
a.
Loosen the three Lock Nuts that secure the Wear Plate to the Chipper
Hopper using a 9/16" Wrench
(Figure 31)
.
b.
Loosen the two Adjuster Lock Nuts on the Wear Plate using a 9/16"
Wrench.
c.
To tighten the gap, bring the Wear Plate closer to the Knife by turning
the Adjuster Jam and Lock Nuts clockwise using a 9/16" Wrench.
Tighten the Adjuster Jam Nut and check the gap.
d.
To Increase the gap, bring the Wear Plate away from the Knife by
turning the Adjuster Jam and lock Nuts counter clockwise using a
9/16" Wrench. Tighten the Adjuster Lock Nuts and check the gap.
Note:
Be sure to check and set the gap equally along the Wear Plate and Knife.
6.
When the Knife gap is set, and the Wear Plate is in the correct position,
tighten the Wear Plate Lock Nuts using a 9/16" Wrench.
Note:
After any Knife or Wear Plate maintenance or adjustment, rotate the Rotor
Disk with a Stick and watch and listen carefully for any unusual noises, clicking or
vibration. If you detect any of these, inspect the machine for damage, or any loose
parts. Repair or replace any damaged parts and tighten any loose parts before
starting the DR PRO-XL CHIPPER-SHREDDER.
7.
Re-connect the Negative Battery Terminal Wire and Spark Plug Wires.
Knife
Gap Gauge
Figure 30
Wear Plate
Rotor
Knife
Wear Plate
1/16
"
Figure 28
Figure 31
Wear Plate
Lock Nuts
Wear
Plate
Adjuster
Lock
Nuts
Adjuster Jam
Nuts
Figure 29
Shredder
Hopper
Chipper Hopper
Blowback Shield
