Servicing The Blade Plane; Servicing The Cutter Blade - Toro Groundsmaster 4500-D Operator's Manual

2. Move cutting deck into position in front of traction
unit.
3. Slide deck carrier frame onto lift arm pivot pin. Secure
with lynch pin or retaining nut (GM 4700 only)
57).
4. Install the hydraulic motor to the deck
Make sure that the O-ring is in position and not
damaged.
5. Grease the spindle.

Servicing the Blade Plane

The rotary deck comes from the factory preset at 5 cm (2.00
inch) height-of-cut and blade rake of 7.9 mm ( 0.310 inch).
The left-hand and right-hand heights are also preset to within
± 0.7 mm (0.030 inch) of the other.
The cutting 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 cutting deck and
remove the cutting deck from the tractor.
2. Use a hoist (or minimum of two people) and place the
cutting deck on a flat table
3. Mark one 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) (Figure 58) and measure height from table
to cutting edge of blade.
9:00
5. Rotate the marked end of the blade to the 3 and 9
o'clock positions (Figure
6. Compare the 12 o'clock measured height to the
height-of-cut setting. It should be within 0.7 mm (0.030
inch). The 3 and 9 o'clock heights should be 3.8±2.2
mm (0.150±.090 inch) higher than the 12 o'clock
setting and within 2.2 mm (0.090 inch) of each other.
(Figure
12:00
3:00
6:00
G011353
Figure 58
58) and measure the heights.
If any of these measurements are not within specification,
proceed to Adjusting the Blade Plane.
Adjusting the Blade Plane
(Figure
Start with the front adjustment (change one bracket at a time).
56).
1. Remove the height-of-cut bracket, (front, left, or right)
from the deck frame
2. Adjust 1.5 mm (0.060 inch) shims and/or 0.7 mm
(0.030 inch) shim between the deck frame and bracket
to achieve the desired height setting
1. Height of cut bracket
3. Install the height-of-cut bracket to the deck frame with
the remaining shims assembled below the height-of-cut
bracket.
4. Secure the socket head bolt/spacer and flange nut.
Note: Socket head bolt/spacer are held together with
Loctite to prevent the spacer from falling inside the
deck frame.
5. Verify the 12 o'clock height and adjust if needed.
6. Determine if only one or both (right-hand and
left-hand) height-of-cut brackets need to be adjusted.
If the 3 or 9 o'clock side is 3.8±2.2 mm (0.150±0.090
inch) higher than the new front height then no
adjustment is needed for that side. Adjust the other
side to within ±2.2 mm (0.090 inch) of the correct side.
7. Adjust the right and/or left height-of-cut brackets by
repeating steps 1 through 3.
8. Secure the carriage bolts and flange nuts.
9. Again, verify the 12, 3, and 9 o'clock heights.

Servicing the Cutter Blade

Removing the Cutter Blade
The blade must be replaced if a solid object is hit, the blade
is out of balance, or if the blade is bent. Always use genuine
50
(Figure 59).
(Figure
Figure 59
2. Shims
59).