Toro Reelmaster 3100-D Series Operator's Manual page 13

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, each cutting unit
must be checked 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 1 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 0.022 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. If a
file is occasionally run across the front edge to remove
this burr, improved cutting can be obtained.
After extended running, a ridge will eventually develop
at both ends of the bedknife. These notches must be
rounded off or filed flush with the cutting edge of the
bedknife to ensure smooth operation.
Note: Over time, the chamfer
to be ground as it is only designed to last 40% of the
bedknife life.
(Figure 21) will need
13
Figure 21
1. Lead-in chamfer on right
end of bedknife
2. 6 mm (0.25 inch)
Note: Do not make the lead-in chamfer too large, as
it may cause turf tufting.
3. 1.5 mm (0.060 inch)