Safety & Operating Instructions
Checking and Adjusting the Knife to Wear Plate Gap
When you replace the Knife, 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 below). Be careful not to overheat it during the sharpening process. This will change the
characteristics of the steel and you will then have to replace the Wear Plate (see “Wear Plate Sharpening” in this chapter).
Tools Needed:
•
Gap Gauge (provided with Chipper)
•
7/16” Wrench
1.
Remove the Hopper Assembly (See “Inspecting the Chipper Knife and Wear
Plate” in this Chapter).
2.
Use a stick to rotate the Flywheel until the Knife is positioned next
to the Wear Plate.
3.
Slide the Knife Gap Gauge in between the Knife and Wear Plate to check the
Figure 34
Figure 35
Carriage
Bolts and
Locknuts
clearance (Figure 34).
•
If the Knife Gauge slides freely, with no resistance and a lot of
extra space, the Wear plate must be adjusted. Proceed to step 4.
•
If the Knife Gauge will not slide down between the Knife and Wear
Plate, the Wear Plate must be adjusted. Proceed to step 4.
•
If the Knife Gauge slides in between the Knife and Wear Plate
with some resistance felt against them both or slides in between
with no noticeable space, then the Wear plate is properly
adjusted. Skip to step 7.
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 35 and 36).
5.
Slide the Gap Gauge between the Knife and Wear Plate (
Figure 34
).
Adjust
the Wear Plate against the Knife Gauge and tighten the
outside Locknut, check the gap, tighten the inside Locknut and then
the center Locknut.
6.
Check the adjustment as described in the “Checking the Knife to Wear
Plate
Gap” in the previous section.
7.
Reinstall the Hopper Assembly
Wear
Plate
Figure 36
1/16" Gap
(thickness of
Gap Gauge)
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 MACKISSIC GRAVITY SELF FEEDING
CHIPPER.
24
Knife
Knife Gap
Gauge
Wear
Plate
Wear
Plate
Carriage
Bolts and
Locknuts
Chipper
Knife
Flywheel
Wear Plate
1/16” Gap
(thickness of
Gap Gauge)
25 MacKissic Gravity Self Feeding Chipper