Adjusting The Contact Between The Cylinder And Bottom Blade - Toro MK3 Operator's Manual

Adjusting the Contact
Between the Cylinder and
Bottom Blade
Service Interval: Before each use or daily
Important:
It is essential that the relationship
between the bottom blades and the cutting units
are kept in good adjustment in order to ensure
good cutting performance, minimum power
consumption, and prolonged life for the cutting
edges. Not making the proper adjustments may
result in higher maintenance costs and a lower
quality of cut that may affect the health and
growth of the grass.
Important:
Do not over adjust. Over-adjusting
may cause heavy contact between the cylinder
and bottom blade, which may create very rapid,
uneven wear, tram lining, waviness of cutting
edges, increased contact pressure, and significant
power absorption.
1. Check that the cutting cylinder is correctly set to
the bottom blade by holding a thin piece of paper
between the cutting cylinder and the bottom
blade (Figure 13).
Figure 13
2. Carefully rotate the cylinder as shown and check
that the paper is cut cleanly at all points along
the length of the blade. Hold the paper at a 90
degree right angle to the bottom blade to obtain
the correct cutting action.
WARNING
The cutting cylinders are sharp, and
contact with them can cause injury. Also,
rotating 1 of the cutting cylinders may
cause others to rotate, exposing others
to potential injury.
Take care when servicing the cutting
cylinders and ensure that bystanders are
away from the machine and cutting units.
3. Stop the procedure if an adjustment is not
necessary. Otherwise, loosen the nut on both
ends of the cutting unit 1/4 turn
4. Turn the hand wheel on each end alternately
while rotating the cutting cylinder backward until
the bottom blade is in fleeting contact with the
cylinder along its entire length
5. Check the cutting action along the length of the
bottom blade using a thin piece of paper and
make marginal adjustments as necessary.
6. Tighten the nuts on each end
1. Hand wheel
7. If you cannot obtain a good clean paper cut
across the entire length of the bottom blade,
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back lap the cutting unit (refer to
the Cutting Unit (page
grinding the cutting cylinder and bottom blade
may be necessary (refer to
Unit (page
12
(Figure
(Figure
(Figure
Figure 14
2. Nut
Backlapping
13). In severe cases,
Grinding the Cutting
13).
14).
14).
14).
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