General Information - Walker D21d Operator's Manual

D21d

General Information

The Grass Handling System (GHS) consists of a
rear discharge mower deck connected to a 10.5 in.
(27 cm) blower and a rear mounted grass catcher
with 10.0 bushel (352 liters) capacity. The GHS
blower oper ates any time the mower blade clutch
is engaged and moves grass through the rear
discharge deck chute into the grass catcher. Blow-
er airflow is ex hausted out the back of the grass
catcher, through a filtering screen. When the grass
catcher is full and needs to be emptied, a "full"
signal horn alerts the operator. When the "full"
signal horn sounds, it is important to stop mowing
to prevent overfilling and clogging of the blower
system.
IMPORTANT: Normally, the GHS blower operates
with no maintenance or cleaning required. How-
ever, under certain operating conditions, the inside
of the blower housing may accumulate a deposit of
dirt, causing wear and binding of the blower wheel.
Normally, dirt buildup occurs when mowing a com-
bination of dirty and damp grass, especially in
the springtime. When operating in these condi-
tions, check the blower wheel frequently for
binding and clean the blower housing as required.
Refer to GHS Blower on page 72.
NOTE: In Autumn, when using the GHS mower to
vacuum leaves, it is recommended to raise the
front of the mower deck 2 to 3 notches [1 to 1-1/2
in. (25 to 38 mm)] higher than the rear. This will
avoid "bulldozing" leaves, particularly when the
leaves are piled in a thick layer. To make this
ad justment, the hitch pins in the two (2) front deck
support pins are repositioned 2 to 3 notches higher
while leaving the rear pins in their original position.
NEVER operate the GHS catcher with the
back door open. Objects may be thrown
out the back of the catcher with sufficient
force to cause serious injury to bystand ers
or property damage.
catching operation, the "No-Catch" Deflec-
tor is an available accessory item.
DANGER
NOTE: For non-
NOTE: When a side discharge or mulching mow er
deck is installed on the GHS model, a blower
intake cover should be installed in the blower
intake tube. This cover "unloads" the blower and
seals the intake to effectively eliminate power loss
and blower noise when the blower is not being
used.
Blower
Intake Cover
Blower Intake Cover
NOTE: An alternative to using the blower intake
cover when a side discharge or mulching deck is
installed on a GHS model is the blower lockout kit
(P/N 7541-1). The blower lockout kit releases
ten sion on the blower drive belt and does not
require the blower intake cover.
DANGER
ROTATING BLOWER BLADES
NEVER operate the GHS blower with the
blower discharge chute uncovered (grass
catcher in the dump position) since dan-
gerous projectiles may be thrown. NEVER
put hands into the blower discharge chute
for any reason. Use a stick or similar in-
strument to remove any material if clog-
ging has occurred.
CAUTION
NEVER leave grass clippings in the grass
catcher after mowing.
generate heat as they decompose. This
MAY cause spontaneous combustion.
Operating Instructions
Damp clippings
49