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5. Adjust the drive belt tension by loosening the jam
nut and tightening the tension bolt against the engine
mounting plate, pushing the engine rearward.
6. Lay a straightedge across clutch and flywheel pulleys,
tighten belt tension bolt so there is 0.40 inch (1 cm) of
flex in the belt when pushing down with 15 lbs (6.8
kg) force, at mid-span (when re-tensioning a belt in
use) or with 18 lbs (8 kg) force when installing a new
belt (Figure 27).
Figure 27
1. Straightedge
7. Ensure that the pulleys are aligned and the engine is
parallel with the frame (not angled toward the side),
then tighten the 4 engine plate mounting bolts, the 4
bolts securing the rear of the belt guard to the engine,
and the jam nut.
8. Install the belt guard and secure it with the previously
removed washers and bolts.
Replacing the Drive Belt
Service Interval: Every 100 hours
Note: Replace the belt if it shows any signs of wear, cracks,
glazing, or damage.
1. Remove the bolts and washers securing the belt guard
to machine.
2. Remove the belt guard (Figure 25).
3. Loosen the 4 engine plate mounting bolts and the 4
bolts securing the rear of the belt guard to the engine.
4. Loosen the belt tension bolt and jam nut, slide the
engine toward the flywheel housing to loosen belt
(Figure 26).
5. Replace drive belt.
6. Adjust tension of new belt to 18 ± 0.9 lb (7.8–8.6 kg)
force at 0.40 inch (1 cm) belt deflection at mid-span.
7. Tighten the 4 engine plate mounting bolts, the 4 bolts
securing the rear of the belt guard to the engine, and
the jam nut.
8. Install the belt guard and secure it with the previously
removed washers and bolts.
G016618
2. Flex of 0.40 inch (1 cm)
Cutter Maintenance
Inspecting the Cutter Block
Service Interval: Before each use or daily
Make sure the cutter block has a crisp edge and is no farther
than 1/8" (3.2 mm) away from the blade. If the cutter block
is worn or chipped it should be replaced (Figure 28).
1. Blade
Replacing the Cutter Blades
Service Interval: Before each use or daily—Inspect the
cutter blades.
Note: Using a dull blade will decrease performance and
cause excessive vibrations that will cause damage to the Brush
Chipper or engine.
1. Remove the bolt and washer securing the flywheel
housing cover, swing it forward to expose the flywheel.
2. Rotate the flywheel using a stick until the bolts and
lock nuts attaching the cutter blades to the flywheel
are accessible (Figure 29).
20
Figure 28
2. Cutter Block
G016620
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