Cutting Unit Maintenance; Backlapping The Cutting Units - Toro 03781 Operator's Manual

Cutting Unit 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 PTO switch to OFF position.
2. Unlock and raise the hood to expose the controls.
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. Select either front, rear or both backlap levers to
determine which units to backlap (Figure 76).
5. 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 low idle engine speed.
DANGER
To avoid personal injury, be certain that
you are clear of the cutting units before
proceeding.
6. With the Mow Speed Limiter in the mow position,
move the PTO switch to the ON position. Press the
Lift Switch to start the backlapping operation on the
designated reels.
7. Apply lapping compound with a long handle brush.
Never use a short handled brush.
1. Front backlap lever
8. If the reels stall or become erratic while backlapping,
increase the throttle speed until the reel stabilizes.
9. To make an adjustment to the cutting units while
backlapping, turn the reels off by pressing the rear
of the lift switch; move the PTO switch to the OFF
position, and stop the engine. After completing
adjustments, repeat steps through 8.
10. Repeat the procedure for all cutting units you want to
backlap.
11. When finished, return the backlap levers to the
Mow position, lower the hood, and wash all lapping
compound off of the cutting units. Adjust cutting unit
reel to bedknife as needed. Move the cutting unit reel
speed controls to the desired mowing position.
Important: If the backlap switch is not returned
to the Off position after backlapping, the cutting
units will not raise or function properly.
Note: Additional instructions and procedures on
backlapping are available in the TORO Sharpening
Reel & Rotary Mowers Manual Form No. 80–300SL.
Note: For a better cutting edge, run a file across
the front face of the bedknife after lapping. This will
remove any burrs or rough edges that may have built
up on the cutting edge.
53
Figure 76
2. Rear backlap lever