Safety & Operating Instructions

b) Using the Straightedge, align the Clutch and Sheave by moving the Sheave in or out on the Rotor Shaft. Do not
make the adjustment by attempting to move the Clutch on the Engine Shaft.
c) Recheck the alignment and then retighten the Sheave Hub Set Screws.
5. Tighten the Engine Hardware ( Figure 22 )
6. Place a Straightedge on the Belt (over the Clutch and Sheave) and push down on the Belt to measure the deflection from
the Straightedge to the Belt with a tape measure ( Figure 25 ).
Note: The force when pushing down on the Belt should be approximately 3 lbs.
7. The measurement should be approximately 3/8".
8. If the measurement is not correct, loosen the Engine Bolts and tighten
or loosen the Adjusting Nut as needed ( Figure 22 ).
9. Repeat steps 6 through 8 until the proper Belt tension is achieved.
10. When the Belt is properly tensioned, double check that the four
Engine Bolts are completely tightened.
11. Reinstall the Belt Guard and Inner Guard .
Note: Check the Drive Belt after an initial break-in period of one (1) hour and
adjust if necessary.
Removing, Replacing and Adjusting the Chipper Knife and Wear Plate
Figure 25
The flywheel will still rotate for A WHILE after the engine is shut off. Shut down the engine, wait for all moving parts to come
to a complete stop, remove spark plug wire, then wait 5 minutes before moving or working on the chipper.
 Routinely check the chipper knife for sharpness. Using a dull knife will decrease performance and cause excessive vibration
that will cause damage to the MACKISSIC GRAVITY SELF FEEDING CHIPPER.
 Routinely check the wear plate for a sharp square edge. Using a rounded or chipped wear plate will decrease performance
and cause excessive vibration that will cause damage to the MACKISSIC GRAVITY SELF FEEDING CHIPPER.
Inspecting the Chipper Knife and Wear Plate
Routine inspection of the Chipper Knife and Wear Plate will ensure that your MACKISSIC GRAVITY SELF FEEDING CHIPPER is
operating at full efficiency (see “Regular Maintenance Checklist” at the beginning of this Chapter). Operating with a worn or
damaged Chipper Knife or Wear Plate will cause extreme stress and vibration to the machine and make chipping difficult for
the operator.
The Knife should be visually checked for damage before each use. The first procedure (“Routine visual inspection of the Chipp er
Knife”) describes a quick way to check the Knife only through the Access Cover.
The second procedure (“Inspecting the Chipper Knife and Wear Plate”) is for a
more detailed look at the condition of the Knife and Wear Plate by removing
the Hopper.
VISUAL INSPECTION OF THE CHIPPER KNIFE (before each use)
Tools Needed:
 7/16" Wrench
1. Loosen the Locknuts that secure the Front Access Cover with a 7/16"
wrench then slide the Cover over and lift it over the Locknuts (Figure 26).
2. Rotate the Flywheel with a long stick until the Knife is visible. Figure 26
CONTACT US AT www.MacKissic.com 21
Straight Edge
Belt
Locknuts
Front Access
Cover