Controls System Maintenance; Adjusting The Cutting Unit Lift/Drop; Backlapping - Toro 04383 Operator's Manual

Controls System
Maintenance
Adjusting the Cutting Unit
Lift/Drop
The cutting unit lift/drop circuit is equipped with a
flow control valve (Figure 55). This valve is preset
at the factory but an adjustment may be required to
compensate for differences in hydraulic oil temperatures,
mowing speeds, etc. If an adjustment is required,
proceed as follows:
Note: Allow the hydraulic oil to reach full operating
temperature before adjusting the flow control valve.
1. Raise the seat and locate the flow control valve for
the center pull frame (Figure 55) which is located on
the side of the hydraulic manifold.
2. Loosen the jam nut on the flow control valve.
3. Rotate the knob 1/4 turn counterclockwise if the
center cutting unit is dropping too late or 1/4 turn
clockwise if the center cutting unit is dropping too
early.
4. After the desired setting has been achieved, tighten
the jam nut.
Figure 55
1. Flow control valve

Backlapping

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.
1. Position the machine on a level surface, lower the
cutting units, stop the engine, engage the parking
brake.
2. Unlock and raise the seat 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.
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.
4. Start the engine and run at low idle speed.
5. Rotate the Backlap Lever to the "R" position
(Figure 56).
1. Backlap lever
6. Rotate the Reel Speed Control to setting 1
(Figure 56).
7. With the functional control lever in the neutral
position, move the Raise/Lower Mow control
46
Figure 56
2. Reel speed control