Safety & Operating Instructions
Checking and Adjusting the Knife to Wear Plate Gap
When you replace the Knife or Wear Plate you must check and set the clearance between the Knife and Wear Plate. Set this
clearance or gap to 1/16" by using the Gap Tool that is supplied with the Chipper and with a new Knife kit. 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 sharpened (see steps
in
this Chapter).
Be careful not to overheat the Wear Plate during the sharpening process. This will change the characteristics of the
steel and could cause damage to the machine. Replace the Wear Plate if it has been overheated.
Figure 54
Wear
Plate
Chipper
Knife
Flywheel
1/16" Gap
(thickness of
Gap Gauge)
Tools Needed:
•
7/16" Wrench
•
Gap Gauge (provided with Chipper and with new Knife Kits)
1.
Remove the Hopper (See “Inspecting the Chipper Knife and Wear Plate”
in
this Chapter).
2.
Use a stick to rotate the Flywheel until the Knife can be positioned next
to the Wear Plate.
3.
Slide the Knife Gauge in between the Knife and Wear Plate to check
the
clearance (Figure 54).
•
If the Knife Gauge slides freely, with no resistance and extra space,
the
Wear plate must be adjusted.
•
If the Knife Gauge will not slide down between the Knife and
Wear Plate, the Wear Plate must be adjusted.
•
If the Knife Gauge slides in between the Knife and Wear Plate with
some resistance felt against them both then the Wear plate is properly adjusted
.
4.
To adjust the Wear Plate Gap, loosen the three Nuts on the Carriage
Bolts with a 7/16" Wrench just enough so the Wear Plate will move but
still have a slight resistance. Now you can slide the Wear Plate up or
down (in or out) to achieve the correct gap setting (Figure 54).
Note:
See
Figure 55
for a more detailed look at the relationship of the Knife to
Wear
Plate.
5.
Take the Gap Gauge and slide it between the Knife and Wear Plate.
Adjust the Wear Plate against the Knife Gauge and tighten the Locknuts.
6.
Check the adjustment using the Gap Gauge.
Figure 55
7.
Install the Hopper and Access Cover when finished.
8.
Re-connect the negative battery terminal wire (electric start only) and
the
spark plug wire.
After any Knife or Wear Plate maintenance or adjustment, rotate the Chipper flywheel by using a wooden 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 GRAVITY SELF-FEEDING
WOOD CHIPPER.
Knife Gap Gauge
Knife
Wear Plate
Carriage Bolt and
Locknut
32 MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER