Blade Maintenance; Blade Safety; Servicing The Blade Plane - Toro 30874 Operator's Manual

3. Press the second bearing into the roller housing
73). Pressing equally on the inner and outer race until
the inner race comes in contact with the spacer.
4. Install the roller assembly into the deck frame.
5. Verify that there is no more than a 1.5 mm (0.060 inch)
gap between roller assembly and the roller mount
brackets of the deck frame. If there is a gap over 1.5
mm (0.060 inch), install enough 5/8-inch diameter
washers to take up the slop.
Important: Securing the roller assembly with a
gap larger than 1.5 mm (0.060 inch) creates a side
load on the bearing and can lead to premature
bearing failure
6. Torque the mounting bolt to 108 N∙m (80 ft-lb).

Blade Maintenance

(Figure

Blade Safety

A worn or damaged blade can break, and a piece of the
blade could be thrown toward you or bystanders, resulting in
serious personal injury or death.
•
Inspect the blade periodically for wear or damage.
•
Use care when checking the blades. Wrap the blades or
wear gloves, and use caution when servicing the blades.
Only replace or sharpen the blades; never straighten or
weld them.
•
On multi-bladed machines, take care as rotating 1 blade
can cause other blades to rotate.

Servicing the Blade Plane

The mower deck comes from the factory preset at 5 cm (2
inches) height of cut and blade rake of 7.9 mm (0.310 inch).
The left and right heights are also preset to within ± 0.7 mm
(0.030 inch) of the other.
The mower deck is designed to withstand blade impacts
without deformation of the chamber. If a solid object is
struck, inspect the blade for damage and the blade plane for
accuracy.
Inspecting the Blade Plane
1. Remove the hydraulic motor from the mower deck and
remove the mower deck from the machine.
2. Use a hoist (or minimum of 2 people) and place the
mower deck on a flat table
3. Mark 1 end of the blade with a paint pen or marker.
Use this end of the blade to check all heights.
4. Position the cutting edge of the marked end of the
blade at 12 o'clock (straight ahead in the direction of
mowing)
to cutting edge of blade.
9:00
5. Rotate the marked end of the blade to the 3 and 9
o'clock positions
59
(Figure 74) and measure height from table
12:00
6:00
Figure 74
(Figure 74) and measure the heights.
3:00
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