Page: 4-72
WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
GHS Signal Horn Adjustment
(When Horn Sounds at Wrong Time) - Model MS,
MD, MT
The vertical position of the Grass-Pak
®
switch is critical
to make sure the catcher box does not overfill causing
the delivery chute to clog. The vertical position can be
adjusted by bending the mounting bracket for the
Grass-Pak
®
switch.
1. Position the discharge chute so that it is pointing
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 DISENGAGED position
and turn the ignition switch to the OFF
position.
2. Measure from the exhaust screen (top of catcher)
to the top of the Grass-Pak
®
switch actuator vane,
as shown. The proper measurement should be be-
tween 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 checking the
measurement each time until the recommended
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 example, 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 adjust-
ed to give the “full” signal with a little advance warning
before overfilling and clogging of the grass delivery
chute begins (regardless of mowing conditions).
DANGER
PINCH POINT - SPRING LOADED DOOR
When lowering the door on the GHS
catcher, depress the safety latch on the
side of the catcher. BE VERY CAREFUL to
keep hands, fingers, etc. out of the hing-
ing mechanism and away from the door
frame as the door closes. The springs that
hold the door closed during operation are
very powerful, and the door can slam shut
with considerable force.
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.
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