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Rotary Mowers 15
Toro University Technical Training
Cutting Unit Adjustments
Height of cut and attitude
Height of cut adjustment and attitude
The height of cut is usually set by the placement of
spacers on the castor wheel shafts or with the height
of the rollers on contour type cutting units. The
effective height of cut can be checked on the turf.
This can be accomplished by inserting a narrow ruler
down into the turf.
Rotary cutting units are normally 1/8" - 1/4" lower at
the front than in the back. This attitude or slope of the
deck cuts down the horsepower requirement to turn
the blades due to the blade only cutting on for the
forward 180° of it’s rotation. If the deck has multi-
blades and this attitude is too far down at the front
the center will cut lower than the sides due to the
center blade being farther forward.
The attitude can be checked by measuring from a flat
surface up to the forward blade tip. Rotate the
forward tip to the rear and take the measurement at
the back. The difference in dimension is the attitude.
Consistent blade height
If the cutting unit has multi-blades, the blade tips
should be checked for height to see that they are all
at the same level to avoid mismatch. This can be
accomplished by pointing all the blade tips forward,
measuring up from a flat surface to each blade tip.
Different height readings could be caused by:
Bent or warped blades.
Bent blade spindles.
Height of cut adjustment different on each side.
The attitude or slope of the cutting unit deck being
incorrect.