Clogging Checklist - Walker D21d Operator's Manual

Operating Instructions

Clogging Checklist

In case of clogging, there will be a distinct change
in the sound of the blower, i.e., the blower sound
will stop. Also, the mower deck will begin to leave a
trail of grass clippings. When this occurs, stop the
engine, disconnect the electrical plug on the fuel
shut-off solenoid, and make sure all movement
has stopped before attempt ing to unclog.
NEVER place hands under the mower deck
or in the GHS blower discharge chute.
Use a stick or similar tool to remove any
clogged material.
Normally, any clogging will first develop at the back
of the mower deck in the discharge opening into the
blower chute. Clogging at this point does not indi-
cate a particular problem in this part of the sys-
tem, but is a symptom of something restrict ing
the flow of material throughout the entire system.
The following list of items should be checked if a
pattern of clogging begins to develop. All of these
items are capable of causing clogging at the back of
the deck.
● Check to see if the mower blades are installed
for the correct rotation. The blade cutting
edges should move towards each other at the
front of the deck on standard rotation decks
(e.g., DC48), and towards each other at the
back of the deck on reverse rotation decks (e.g.,
DC52R).
Blades Must Operate at
Right Angles (90 Degrees)
Rear Discharge
Chute
Blade Rotation for Standard Rotation
GHS Mower Deck (Bottom View)
48
DANGER
FORWARD
Mounting Nut
Torque = 60 lb
·
(81 N m)
Right Angles (90 Degrees)
Rear Discharge
Chute
Blade Rotation for Reverse Rotation
GHS Mower Deck (Bottom View)
Check the amount of flat section remaining at
●
blade tip. This is the area that is ground away
(re moved) when the blades are sharpened. If
too much of the flat section is removed, the "air
lift" performance or "shovel" effect of the blade
deteriorates to the point that discharge of grass
clippings into the blower chute is marginal. Re­
place cutter blades if less than 3/4 in. (19 mm)
flat section remains at the blade tip.
● Check that the interior of the deck housing and
baffling is reasonably clean and free of grass
and dirt buildup. While some degree of mate­
rial buildup can be tolerated, a point is finally
reached where the flow of air and grass clip­
pings is restricted.
NOTE:
buildup of material in the deck housing is mow­
ing grass and/or weeds which are "juicy." The
material collects under the deck with sticky,
green juice. Clo ver and weeds are especially a
problem.
cleaned frequently when operating in these con­
ditions.
● Check the deck cutting height setting. When
working in thick, tall grass, lower deck set-
tings [1 to 2 in. (25 to 51 mm) cutting heights]
tend to restrict airflow from moving into and
under the deck. Raising the deck cutting height
·
ft
will signifi cantly increase airflow and reduce
clogging when working in thick, tall grass.
● Check the interior of the chute connecting the
mower deck to the blower for smoothness and
freedom from obstruction.
Blades Must Operate at
FORWARD
Mounting Nut
Torque = 60 lb
(81 N
One condition that quickly causes a
The mower deck will need to be
·
ft
·
m)