Walker MT - Manual (Page 88)

Maintenance Instructions
ADJUSTMENTS
84
GHS Signal Horn Adjustment
(When Horn Sounds at Wrong Time)
The vertical position of the Grass-Pak
®
switch is crit-
ical to make sure the catcher box does not overfill
causing the delivery chute to clog. The vertical po-
sition can be adjusted by bending the mounting
bracket for the Grass-Pak
®
switch.
1. Position the discharge chute so that it is point-
ing straight back.
a. Turn the ignition switch ON and move the
blade clutch to the ENGAGED position
(engine not running).
b. Open the catcher back door and monitor
the spout position (as it oscillates) and
move the blade clutch to the DISEN-
GAGED position and turn the ignition
switch to the OFF position.
2. Measure from the exhaust screen (top of catch-
er) to the top of the Grass-Pak
®
switch actuator
vane, as shown. The proper measurement
should be between 4 and 4-1/2 inches (10.16
and 11.43 cm).
Adjusting the Grass-Pak
®
Switch
(Side view of Catcher Box)
3. If adjustment is required, hold the Grass-Pak
®
switch mount bracket firmly, grasp the switch
and bracket and bend it down. Adjustments
should be done in very small increments check-
ing the measurement each time until the recom-
mended measurement is achieved. This
measurement is applicable to all catcher box
sizes.
NOTE: It will not be possible to adjust the switch to
give a signal at the precise instant the catcher is full
for a wide variety of mowing conditions. For exam-
ple, wet heavy grass will fill the catcher differently
than dry fluffy grass, causing the signal to come on
a little sooner or later than usual. Primarily, the
switch should be adjusted to give the “full” signal
with a little advance warning before overfilling
and clogging of the grass delivery chute begins (re-
gardless of mowing conditions).
WARNING
DO NOT test the Grass-Pak
®
switch with
the engine running. Projectiles CAN be
thrown out of the grass delivery spout and
CAN cause serious injury to bystanders or
property damage.
Exhaust
Screen
Bend
Point
4 to 4-1/2 in.