Cutting Unit System
Maintenance
Blade Safety
•
A worn or damaged blade or bedknife can break,
and a piece could be thrown toward you or
bystanders, resulting in serious personal injury or
death.
•
Inspect the cutting units periodically for excessive
wear or damage.
•
Use care when checking the cutting units. Wrap
the blades or wear gloves, and use caution when
servicing the reels and bedknives. Only replace or
sharpen the reels and bedknives; never straighten
or weld them.
•
On machines with multiple cutting units, take care
when rotating a reel; it can cause the reels in the
other cutting units to rotate.
Checking the
Reel-to-Bedknife Contact
Service Interval:
Before each use or daily
Check the reel-to-bedknife contact even if the quality
of cut had been acceptable previously. There must
be light contact across the full length of the reel and
bedknife; refer to Adjusting Reel to Bedknife in the
cutting unit operator’s manual.
Backlapping the Cutting
Units
Note:
When backlapping, the front units all operate
together, and the rear units operate together.
1.
Park the machine on a level surface, lower the
cutting units, shut off the engine, engage the
parking brake, and move the Enable/Disable
switch to disable position.
2.
Unlock and raise the seat to expose the controls.
3.
Locate the reel speed selector knobs and
backlap knobs (
). Rotate the desired
backlap knob(s) to the backlap position and the
desired reel speed selector knob(s) to position 1.
g005018
Figure 78
1.
Backlap knobs
2.
Reel speed selector knobs
Note:
Backlapping speed may be increased
by moving the reel speed selector knob
toward 13. Each position increases the speed
approximately 100 rpm. After changing the
selector, wait 30 seconds for the system to
stabilize at the new speed.
4.
Make initial reel to bedknife adjustments
appropriate for backlapping on all cutting units
which are to be backlapped.
5.
Start the engine and run it at idle speed.
6.
Select either front, rear, or both backlap knobs
to determine which reels will be backlapped.
7.
Move the Enable/Disable switch to the Enable
position. Move the Lower Mow/Lift control
forward to start the backlapping operation on the
designated reels.
8.
Apply lapping compound with a long-handled
brush (Toro Part No. 29-9100). Never use a
short-handled brush.
9.
If the reels stall or become erratic while
backlapping, stop backlapping by moving the
Lower Mow/Lift control lever rearward. Once
the reels have stopped, move the desired reel
speed selector knob(s) one position closer to
13. Resume backlapping by moving the Lower
Mow/Lift control lever forward.
10.
To make an adjustment to the cutting units while
backlapping, stop the cutting units by moving
the Lower Mow/Raise lever rearward; move
the Enable/Disable switch to Disable and shut
off the engine. After adjustments have been
completed, repeat steps
through
11.
When the cutting unit is adequately sharpened,
a burr will form on the front edge of the knife.
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