Ghs Blower; Ghs Exhaust Screen - Walker D21d Operator's Manual

Maintenance Instructions
Cleaning
3. Clean grass buildup underneath the deck
using a pressure washer (and scraper if re-
quired).
NOTE: If the buildup is severe, it may be
easier to clean the deck by removing the deck
assembly from the tractor and standing the
deck assembly on its "nose".
NOTE: While some degree of material build-
up in the mower deck housing can be toler-
ated, a point is finally reached where cutting
quality deteriorates and clogging begins to
occur because of too much buildup on the
baffling and housing.
4. Lower the deck to the normal operating posi-
tion and re-engage the deck lock levers.
Do not operate machine with deck tilt-up
pivot joint unlocked.

GHS Blower

Normally, the GHS blower operates with no
mainte nance or cleaning. However, when mowing
grass that is dirty and damp (especially certain
springtime mow ing conditions), a deposit of dirt
may accumulate inside the blower housing, caus-
ing wear and binding of the blower wheel. When
operating in these conditions, inspect the blower
frequently for dirt buildup.
NOTE: A visual clue of binding of the blower wheel
is the blower blade tips are polished from rubbing
on dirt.
When a dirt deposit is found, use a high pressure
washer or water spray to clean the inside of the
housing as follows:
Before attempting to wash the blower, stop
the engine, remove the ignition key, and
electrical plug on the fuel shut-off solenoid.
Wear goggles or face shield.
72
CAUTION
DANGER
1. Remove the GHS blower drive belt tension by
depressing the idler pulley on the tightener
arm. Roll the belt off the blower pulley. The
belt should be clear of the blower pulley, allow-
ing free movement of the blower wheel.
Blower
Pulley
Blower
Drive Pulley
Depress Idler Pulley
Down to Relax Belt
Collapse Blower Belt Tightener
to Remove GHS Blower Drive Belt
IMPORTANT: With the belt removed, the
blow er wheel must spin freely. Any binding
or drag ging of the wheel is an indication of dirt
buildup. This buildup must be cleaned to
avoid abrasive wear of the blower blades,
ex cessive power loss and eventual loss of
blower performance (clogging).
2. Use a pressure washer or water spray, and
di rect the spray inside the blower housing
against the blower blades. Water pressure will
cause the blower wheel to begin to spin and
the com bination of spinning action and water
will effec tively wash the inside of the housing.
Spray may be directed against the blower
blades ver tically and horizontally to cause
rotation in both directions for thorough wash-
ing action. Wash blower until the blower
wheel spins freely in both directions.
3. Reinstall the GHS blower drive belt by revers-
ing the removal procedure.

GHS Exhaust Screen

Refer to Cleaning the GHS Exhaust Screen on
page 52.
D21d
GHS Blower
Drive Belt
Belt Tightener
Idler Pulley