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Bedknife/Height of Cut Chart
Bedknife
Part No.
Low HOC
120-1641
(Optional)
(27 inch)
120-1642
(32 inch)
EdgeMax®
112-8910
(Optional)
(27 inch)
112-8956
(32 inch)
Standard
114-9388
(Production)
(27 inch)
114-9389
(32 inch)
Heavy Duty
114-9390
(Optional)
(27 inch)
114-9391
(32 inch)
Note: * Warm-season grasses may require the Low
HOC bedknife for 12.7 mm (0.500 inch) and below.
Figure 21
1. Bedknife lip height *
Adjusting the
Turf-Compensation Settings
The turf-compensation spring transfers the weight from the
front to the rear roller. This helps to reduce a wave pattern in
the turf, also known as marcelling or bobbing.
Important: Make the spring adjustments with the
cutting unit mounted to the traction unit, pointing
straight ahead and lowered to the shop floor.
1. Make sure that the hairpin cotter is installed in the rear
hole in the spring rod
Bedknife Lip
Height of Cut
Height *
5.6 mm
6.4 to 12.7 mm
(0.220 inch)
(0.250 to 0.500
inch)
6.9 mm
9.5 to 63.5 mm
(0.270 inch)
(0.375 to 2.50
inches)*
6.9 mm
9.5 to 63.5 mm
(0.270 inch)
(0.375 to 2.50
inches)*
9.3 mm
12.7 to 63.5 mm
(0.370 inch)
(0.500 to 2.50
inches)
(Figure
22).
1. Turf-compensation spring
2. Hairpin cotter
2. Tighten the hex nuts on the front end of the spring rod
until the compressed length of the spring is 15.9 cm
(6.25 inches)
Note: When operating the machine on rough terrain,
decrease the spring length by 12.7 mm (1/2 inch).
Note: The turf-compensation setting will need to be
g006510
reset if the HOC setting or the aggressiveness-of-cut
setting is changed.
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 a sheet of paper, when
inserted at a right angle to the bedknife, at both ends
and the center of the reel.
13
Figure 22
3. Spring rod
4. Hex nuts
(Figure
22).
g027169
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