Cutterheads Grinding; Cutterheads Bottom Blade Replacement; Raising The Mower Off The Ground - Toro CT2120 30655 Operator's Manual

8. Thoroughly clean the blade edges and adjust the
cutting cylinders to the bottom blades. Check that
a thin piece of paper can be cut cleanly at all points
along the cutting edges while rotating the cylinders
by hand.
9. If further back lapping is necessary repeat steps 2–8.
10. Thoroughly remove and wash off all traces of the
carborundum paste from the cylinders and bottom
blades.

Cutterheads Grinding

It will be necessary to carry out a grinding operation
to correct cylinder spiral edges or bottom blade edges
which have become excessively rounded or distorted.
Bottom blades which are nearing the end of their
wear life should be replaced. The new blades should
be ground on their holders prior to fitting, refer to
Cutterheads Bottom Blade Replacement (page 49).
When grinding operations are necessary it is essential
that both cylinders and bottom blades are ground at the
same time. The only exception to this rule is when a
new cylinder is fitted in which case it is only necessary
to grind the bottom blade. All such grinding operations
should be carried out by your authorized dealer on a
quality, well maintained cylinder/ bottom blade grinding
machine
Cutterheads Bottom Blade
Replacement
1. Remove the bottom blade holder by removing the
3 fixing bolts at each end and withdraw from the
cutterheads.
2. Remove the worn bottom blade and discard the
countersunk screws and securing nuts.
3. Fit the new blade to the holder and loosely assemble
with new countersunk screws and securing nuts.
4. Tighten the centre bolts to a torque of 40 N-m (30
lb-ft).
5. Continue by tightening the remaining bolts to the
same torque by working from the centre out towards
the blade ends.
6. The new bottom blade must be ground on its holder
prior to refitting to the cutterheads. Adjust the
cutting cylinder position to give adequate clearance
for fitting the new bottom blade holder.
7. Install the bottom blade holder assembly to the
cutterheads using the original fixing bolts and tighten
to a torque of 35 N-m (26 lb-ft).
8. Finally adjust the cylinder to
the bottom blade, refer to
Cutterhead Cylinder to Bottom Blade Adjustment (page 47).
1. Front left hand lifting point
2. Front right hand lifting
point
Raising The Mower Off The
Ground
WARNING
When the mower is raised off the ground:
• NEVER crawl under the mower.
• NEVER start the engine.
Important: Before raising the mower ensure that
the lifting device to be used is in good condition
and capable of supporting the weight of the mower
securely. Minimum lift capacity 2000 Kg (2 Tons).
1. Park the mower on level ground.
2. Set the parking brake.
3. Turn the engine switch to off and remove the
ignition key.
4. Ensure the ground under the lifting device is level
and firm.
49
1 2
G0144447
3
Figure 71
3. Rear lifting point