Cleaning Hopper Screens; Cleaning The Hopper Full Sensor - Toro 74191 Operator's Manual

Cleaning Hopper Screens

For best clipping collection, maximum air flow
through the hopper is required. To provide maximum
air flow, the hopper screens must be kept clean.
1. To clean the hopper screens dump the hopper to
remove grass clippings.
2. With the door open, remove the knobs at the
upper front of the hopper and slide the screens
out the rear of the hopper (Fig. 53).
3. Clean the screen by brushing off with your hand,
blowing with compressed air or spraying with a
stream of water.
4. Replace the screens and secure with knobs
(Fig. 53). Close and latch the hopper door.
1
Figure 53
1. Knob
2
m–3546
2. Screen
Cleaning the Hopper Full
Sensor
The hopper full sensor, inside the top right side of the
hopper, detects a beam of light from the transmitter to
the receiver. If the light beam is blocked the sensor
buzzer sounds. If the lenses are covered with
clippings or debris it may give false hopper full
signals and needs to be cleaned.
1. To clean the hopper full sensor dump the hopper
to remove grass clippings.
2. With the door open, wipe off the lenses of both
the transmitter and receiver with a soft cloth or
paper towel (Fig. 54).
3. To test the hopper full sensor for proper
operation turn the ignition key and PTO switch
to "ON", but do not start the engine. Place a
piece of heavy cardboard in front of the
transmitter to block the light beam (Fig. 54). The
alarm buzzer should sound.
Note: Do not use your hand to test for proper
sensor operation as the light beam may
pass through or around your hand and
not properly activate the sensor.
1
Figure 54
1. Transmitter
Maintenance
2
2. Receiver
51