Safety & Operating Instructions

Figure 43
Sheave
Belt
Clutch
Pulley
Gap
Straightedge
Gap
7. Remove the Belt from the Clutch and Sheave (Figure 44).
INSTALLING AND ADJUSTING THE BELT
Note : The Belt Tensioning Adjusting Bolt may need to be loosened up more
per the previous instructions “Removing the Belt” to enable you to install a
new Belt.
1. Install the new Belt onto the Sheave and Clutch.
2. Use a 1/2" Wrench to adjust the Belt Tensioner until the Belt is not
sagging but not too tight (Figure 43).
3. Check the alignment of the Clutch with the Sheave by placing a
Straightedge flat across the Sheave outer surface and position the other
end of the above (not touching) the face of the Clutch Pulley (Figure 44).
4. Check the gap from the Straightedge to the Belt near the Sheave and
near the Clutch. If the gap is the same then no adjustment is needed. If
the gap is not the same then adjustment is necessary, correct the
alignment as follows:
WC475 MODEL
a) Loosen the Flywheel Pulley Set Screws a few turns using a
1/8" Allen Wrench (Figure 45a).
b) Move the Flywheel Pulley in or out to align the Belt with
the Straightedge.
Note: Make sure the Key stays in the Key slot of the Pulley.
c) Tighten the Set screws to secure the Pulley.
WC575E MODEL
a) Remove the Bushing Retaining Bolts with a 7/16" Wrench (Figure
Figure 44
45b ).
Note: The Sheave Bushing has four holes. Two holes for securing the
Figure 45a: WC475
Model
Sheave to the Bushing (threads are in the Sheave) and two holes for separating
the Sheave from the Bushing (treads are in the Bushing).
b) Reinstall the two Bolts into the Bushing Threaded Holes
next to the two holes you just removed the Bolts from.
c) Slowly tighten the Bolts evenly and alternately (1/4 to 1/2
turn) starting with the Bolt farthest from the Bushing Saw Slot (this acts
as a Hub puller) until the Bushing releases from the Flywheel Shaft.
d) When the Sheave is loose, remove the two Bolts and reinsert
them into the original Retaining Bolt holes by hand.
e) Using the Straightedge, align the Clutch and Sheave by moving
the Sheave Bushing in or out on the Flywheel Shaft.
Note: The Pulley will move slightly onto the Bushing when tightening
the Bolts. You may need to compensate for this movement when
positioning the Bushing on the Shaft.
f) Slowly tighten the Bushing Retaining Bolts evenly and alternately
(1/4 to 1/2 turn). The Bolts only need to be snug. Do not over tighten.
g) Recheck the alignment and adjust as needed.
Sheave
Bushing
Key
Bushing
Retaining
Bolts
Flywheel
Shaft
Set Screws
Flywheel
Pulley
Key
Flywheel Shaft
Clutch Pulley
Clutch Pulley
28 MACKISSIC GRAVITY SELF-FEEDING WOOD CHIPPER
Clutch
Pulley
Gap
Straightedge
Gap
Belt