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Cutting Unit System
Maintenance
Backlapping the Cutting Units
WARNING
Contact with the reels or other moving parts can
result in personal injury.
• Keep fingers, hands, and clothing away from the
reels or other moving parts.
• Never attempt to turn the reels by hand or foot
while the engine is running.
Note: When backlapping, the front units all operate together,
and the rear units operate together.
1. Position the machine on a level surface, lower the
cutting units, stop the engine, engage the parking brake,
and move the Enable/Disable switch to the D
position.
2. Unlock and raise the seat to expose the backlap levers
(Figure
76).
3. Make initial reel-to-bedknife adjustments appropriate
for backlapping on all cutting units which are to be
backlapped; refer to the cutting unit Operator's Manual.
4. Start the engine and run at low idle speed.
DANGER
Changing the engine speed while backlapping
may cause the reels to stall.
• Never change the engine speed while
backlapping.
• Only backlap at idle engine speed.
5. Select either the front, rear, or both backlap levers to
determine which units to backlap
DANGER
To avoid personal injury, be certain that
you are clear of the cutting units before
proceeding.
6. With the Mow/Transport lever in the M
move the Enable/Disable switch to the E
position. Move the Lower Mow/Lift control forward
to start the backlapping operation on the designated
reels.
7. Apply lapping compound with a long-handled brush.
Note: Never use a short-handled brush.
ISABLE
(Figure
76).
position,
OW
NABLE
49
8. If the reels stall or become erratic while backlapping,
select a higher reel-speed setting until the speed
stabilizes, then return the reel speed to your desired
speed.
9. To make an adjustment to the cutting units while
backlapping, turn the reels off by moving the Lower
Mow/Raise lever rearward and the Enable/Disable
switch to the D
ISABLE
After completing the adjustments, repeat steps
through 8.
1
Figure 76
1. Backlap levers
10. Repeat the procedure for all cutting units you want to
backlap.
11. When finished, return the backlap levers to the
M
position, lower the seat, and wash all lapping
OW
compound off the cutting units.
Note: Adjust cutting unit reel to bedknife as needed.
Adjust the cutting-unit reel speed to the desired
mowing setting.
Important: If the backlap switch is not returned
to the O
position after backlapping, the cutting
FF
units do not raise or function properly.
Note: For a better cutting edge, run a file across the
front face of the bedknife after lapping. This removes
any burrs or rough edges that may have built up on
the cutting edge.
position, and stop the engine.
4
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