Use the following chart to determine which bedknife is best suited for the desired height of cut.
Bedknife/Height of Cut Chart
Bedknife
Part No.
Bedknife Lip Height
Height of Cut
Low HOC (Optional)
110-4084
5.6 mm
(0.220 inch)
6.4 to 12.7 mm
(0.250 to 0.500 inch)
EdgeMax® Low HOC
(Optional)
127-7132
5.6 mm
(0.220 inch)
6.4 to -12.7 mm
(0.250 to 0.500 inch)
Extended Low HOC
(Optional)
120-1640
5.6 mm
(0.220 inch)
6.4 to 12.7 mm
(0.250 to 0.500 inch)
Extended EdgeMax® Low
HOC (Optional)
119-4280
5.6 mm
(0.220 inch)
6.4 to 12.7 mm
(0.250 to 0.500 inch)
EdgeMax®
(Models 03698 and 03699)
108-9095
6.9 mm
(0.270 inch)
9.5 to 38.1 mm
(0.375 to 1.50 inches)*
Standard (Optional)
108-9096
6.9 mm
(0.270 inch)
9.5 to 38.1 mm
(0.375 to 1.50 inches)*
Heavy Duty (Optional)
110-4074
9.3 mm
(0.370 inch)
12.7 to 38.1 mm
(0.500 to 1.50 inches)
* Warm-season grasses may require the Low HOC bedknife for 12.7 mm (0.500 inch) and below.
Figure 27
1.
Bedknife lip height
Checking and Adjusting the Cutting
Unit
The dual knob bedknife-to-reel adjustment system
incorporated in this cutting unit simplifies the adjustment
procedure needed to deliver optimum mowing performance.
The precise adjustment possible with the dual knob/bedbar
design gives the necessary control to provide a continual
self-sharpening action—thus maintaining sharp cutting edges,
ensuring good quality of cut, and greatly reducing the need
for routine backlapping.
Prior to mowing each day, or as required, check each cutting
unit to verify proper bedknife-to-reel contact.
This must
be performed regardless of whether the quality of cut is
acceptable.
1.
Lower the cutting units onto a hard surface, shut off
the engine, and remove the ignition key.
2.
Slowly rotate the reel in a reverse direction, listening
for reel-to-bedknife contact. If no contact is evident,
turn the bedknife adjusting knobs clockwise, 1 click at
a time, until you feel and hear light contact.
Note:
The reel must cut one sheet of paper, when
inserted at a right angle to the bedknife, at both ends
and the center of the reel.
Note:
The adjustment knobs have detents
corresponding to 0.023 mm (0.0009 inch) bedknife
movement for each indexed position.
3.
If excessive contact/reel drag is evident, either backlap,
reface the front of the bedknife, or grind the cutting
unit to achieve the sharp edges needed for precision
cutting; refer to the
Toro Manual for Sharpening Reel and
Rotary Mowers
, Form No. 09168SL.
Important:
Light contact is preferred at all times.
If light contact is not maintained, the bedknife/reel
edges will not sufficiently self-sharpen and dull
cutting edges will result after a period of operation.
If excessive contact is maintained, bedknife/reel
wear will be accelerated, uneven wear can result,
and quality of cut may be adversely affected.
Note:
As the reel blades continue to run against the
bedknife, a slight burr will appear on the front cutting
edge surface along the full length of the bedknife. To
improve the cutting performance, occasionally run a
file across the front edge to remove this burr.
After extended running, a ridge will eventually develop
at both ends of the bedknife. You must round off these
notches or file them flush with the cutting edge of the
bedknife to ensure smooth operation.
Note:
Over time, the chamfer (
) will need
to be ground as it is only designed to last 40% of the
bedknife life.
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