Adjustments - Exmark Ultra Vac Frontrunner Operator's Manual

4.1.6 Flexible Discharge Tube:
Inspect the flexible discharge tube for wear or damage.
4.1.7 Fill Sensor
The fill sensor is located at the front of the hopper, and is wired into the PTO
circuit. When grass fills the hopper enough to block one or both sensors, an alarm
will sound. The fill sensor testing must be made with the PTO engaged, but the
engine does not have to be running.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake. Unlatch the door and pull the door handle engagement pin to
raise the door to the top of the hopper (see Figure 8.)
b) Reach into the hopper and place a piece of masking or duct tape over the LH
sensor.
c) Close the door.
d) Sit in the seat and turn the key to the RUN position, but DO NOT START the
unit.
e) Pull up on the PTO switch to engage power to the clutch; you should hear a
click from the clutch.
f) There is a split second delay before the fill sensor alarm will sound.
g) Repeat steps a-c to remove the tape from the sensor.

4.2 ADJUSTMENTS

The FrontRunner Ultra Vac was adjusted at the factory to operate properly.
However, there are three basic adjustments that can be made, should your unit
require them:
4.2.1 Fill sensors: Located inside the hopper, they sound an alarm when the hopper is
full. They can be adjusted for varying grass conditions that fill the hopper
differently (see Figure 9).
WARNING
POTENTIAL HAZARD
♦ Under normal use the flexible discharge
tube will wear. Objects could exit a worn
flexible discharge tube at high speeds.
WHAT CAN HAPPEN
♦ Thrown objects can cause serious injury
or kill you or bystanders.
HOW TO AVOID THE HAZARD
♦ Check the flexible discharge tube for tears
and holes. Replace worn flexible
discharge tube.
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