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Cutting Units System
Maintenance
Back Lapping the Cutting
Units
WARNING
Contact with the cutting units or other moving parts
can result in personal injury.
• Keep your fingers, hands, and clothing away
from the cutting units or other moving parts.
• Never attempt to turn the cutting units by hand
or foot while the engine is running.
This process is recommended for restoring the sharp
cutting edges to reels and bedknives which are essential for
good-quality grass cutting.
This process can only deal with a small amount of metal
removal to restore the cutting edges. If the blade edges are
seriously worn or damaged it will be necessary to remove the
component parts and have them ground again.
1. Ensure that the mower engine is shut off and that the
parking brake is engaged.
2. Adjust the reels to the bedknives to obtain light contact.
3. Apply a medium-grade detergent-based carborundum
paste to the cutting edges of the reels with a
long-handled brush.
80-grade carborundum paste
0.45 kg (1 lb)
11.3 kg (25 lb)
4. Sit on the operator seat, start the engine, and set the
engine speed to idle.
WARNING
If you touch the cutting units when the engine
is running, you could be seriously injured.
• Ensure that the area surrounding the
cutting units is clear of people.
• Keep your hands and feet clear of the
cutting units during the period when the
mower engine is running.
5. Operate the cutting unit drive switch to the
reverse/back lap position for a period of time and
listen to the grinding action.
6. Operate the cutting unit drive switch to the O
position and shut off the engine when the grinding
action has stopped.
7. Thoroughly clean the blade edges and adjust the
bedknives to the reels.
8. Check that a thin piece of paper can be cut cleanly at
all points along the cutting edges while rotating the
reels by hand.
9. If further back lapping is necessary repeat steps 2
through 8.
10. Thoroughly remove and wash off all traces of the
carborundum paste from the reels and bedknives.
47
Part No.
63-07-088
63-07-086
G014445
Figure 58
g014445
FF
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