Exmark COMMERCIAL 30 Operator's Manual page 16

Operation
DANGER
If the blade brake clutch system is inoperative,
the blade will continue to rotate when you
release the blade control bail. Contact with
the blade could occur, causing serious injury.
• Check the BBC operation before each use.
• Never use the BBC-equipped lawn mower
with an inoperative safety system.
• Take your lawn mower to an Authorized
Service Dealer for repair if the safety
system fails to operate properly.
Test Using the Grass Bag
1. If the mulch plug is installed on the mower,
remove it (refer to Removing the Mulch Plug). If
the side discharge deflector is on, remove it and
install the side discharge door (refer to Using the
Side Discharge Deflector).
2. Install the empty grass bag on the rear of the
mower (refer to Installing the Grass Bag).
3. Start the engine.
4. Push the blade control lock lever forward to
release the blade control bail (Figure 4).
5. Squeeze the blade control bail against the handle.
6. The bag should begin to inflate, indicating that
the blade is engaged and rotating.
7. Release the blade control bail. If the bag does not
immediately deflate, it indicates that the blade is
still rotating. The blade brake clutch mechanism
may be deteriorating, and, if ignored could result
in an unsafe operating condition. Have the lawn
mower inspected and serviced by an Authorized
Service Dealer.
8. Stop the engine and wait for all moving parts to
stop.
Adjusting the Cutting Height
The rear wheels are adjusted together with a height
adjustment rod located on the mower housing by
the left rear wheel. The front wheels are adjusted
separately by removing the front wheel shaft
assemblies, adjusting the height, and then replacing
the shaft assemblies. The cutting height can be
adjusted from 1 1/2 inches (38 mm) to 5 inches (127
mm) in 1/2 inch (12.7 mm) increments.
WARNING
Adjusting the cutting height levers could bring
your hands into contact with a moving blade. A
moving blade can cause serious injury.
• Stop the engine and wait for all movement to
stop before adjusting the cutting height.
• Do Not put your fingers under the housing
when adjusting the cutting height.
• Rear Wheel Adjustment:
1. Pull the wheel height adjustment rod upward
to release the pin from the notch in the
adjustment bracket (Figure 12).
1. Pull upward
2. Wheel height adjustment
rod
3. Indicator
2. Apply downward pressure or lift the housing
to rotate the height adjustment bracket to the
desired setting.
3. Release the wheel height adjustment rod to set
the pin securely in the desired notch.
16
Figure 12
4. Pin
5. Rotate to desired setting
g016436