Cutting Unit Maintenance
Blade Safety
Use care when checking the cutting-unit reel. Wear
gloves and use caution when servicing the reel.
Leveling the Rear Drum to
the Reel
1.
Park the machine on a flat, level surface,
preferably a precision steel work plate.
2.
Place a 0.6 x 2.5 cm (1/4 x 1 inch) flat steel strip,
approximately 73.6 cm (29 inches) long, under
the reel blades and against the front edge of the
bedknife to prevent the bedbar from resting on
the work surface.
3.
Raise the front roller so that only the rear drum
and the reel are on the surface.
4.
Firmly press down on the machine above the
reel so that all reel blades contact the steel strip.
5.
While pressing down on the reel, slide a feeler
gauge under one end of the drum, then check
the other end of the drum.
Note:
If there is a gap between the drum and
the work surface, greater than 0.25 mm (0.010
inch), on either end, adjust the drum (proceed to
step 6). If the gap is less than 0.25 mm (0.010
inch), no adjustment is required.
6.
Remove the rear belt cover from the right side of
the machine (
g007598
Figure 50
1.
Traction-drive belt cover
7.
Rotate the driven pulley until the holes align with
the 4 roller bearing flange screws (
).
g007599
Figure 51
1.
Driven pulley
3.
Idler pulley
2.
4 holes
8.
Loosen the 4 roller bearing screws and the
screw that secures the idler pulley.
9.
Raise or lower the right side of the roller
assembly until the gap is less than 0.25 mm
(0.010 inch).
10.
Tighten the roller bearing screws.
11.
Adjust the belt tension and tighten the idler
pulley mounting screw (
Adjusting the Bedknife to
the Reel
Adjust the bedknife to the reel after grinding,
backlapping, or disassembling the cutting unit. This
procedure is not intended as a daily adjustment.
1.
Park the machine on a flat, level work surface.
2.
Tilt the machine back on the handle to expose
the bedknife and the reel.
Important:
Do not tip the machine at an
angle greater than 25°. Tipping the machine
beyond 25° leads to oil leaking into the
combustion chamber and/or fuel leaking out
of the fuel-tank cap.
3.
Rotate the reel so that a blade crosses the
bedknife edge between the first and second
bedknife screw heads on the right side of the
cutting unit (
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