Flushing Radiator And Changing Coolant; Grass Buildup In Mower Deck Housing - Walker D21d Operator's Manual

D21d
1. Lift to remove the screen. To clean the
screen, wash with soapy water or blow out
with compressed air.
2. Inspect the radiator cooling fins for material
lodged in this area which would restrict cooling
airflow. Use pressurized air or water to clean.
DO NOT use any tool, like a screwdriver or
knife, to clean material out of the fins as this
may damage the cooling fins. DO NOT use
cold water on a hot radiator.
NOTE: Directing pressurized air or water from
the fan side of the radiator outward is recom-
mended to dislodge material packed on the
outside of the cooling fins. DO NOT use cold
water on a hot radiator.
Radiator and engine parts can become ex-
tremely hot during operation. Wear gloves
and avoid touching hot parts while clean-
ing the radiator screen and cleaning debris
away from the engine and cooling system.

Flushing Radiator and Changing Coolant

Change engine coolant every year. Drain the
coolant from the engine and radiator:
1. Remove the radiator cap.
2. Open the drain cocks on the engine block and
radiator (see the Kubota Owner's Manual for
location of the drain cocks). Also, drain the
coolant recovery tank.
If there is any indication of deposits or scal-
3.
ing inside the radiator, use a commercial scale
remover and flush the cooling system thor-
oughly before adding fresh coolant.
Use a pre-mixed 50/50 solution of antifreeze (eth-
ylene glycol) and distilled water to refill the cooling
system.
IMPORTANT: The solution of antifreeze and water
must be thoroughly pre-mixed before putting it in
the engine. Adding pure antifreeze into the radia-
tor may cause damage to the engine from over-
heating.
WARNING
Maintenance Instructions
IMPORTANT: Maintain proper coolant level in
the radiator and coolant recovery tank. The cool-
ant level should be maintained between FULL and
LOW marks on the coolant recovery tank.
Recheck the coolant level after the first time the
engine has been operated after filling the coolant
system (it would be normal to add a little coolant
after initial operation).

Grass Buildup in Mower Deck Housing

DANGER
Before raising or removing the mower deck
for cleaning, stop the engine, re move the
ignition key, and disconnect the electrical
plug on the fuel shut-off solenoid.
1. Raise the deck lock lever handle on each side
of the carrier frame and pull out to release
car rier frame for tilting action.
2. Using the carrier frame lift handle (or tilt bar),
raise deck to the TILT-UP position and insert
the deck hook into the tilt-up latch on the trac-
tor body.
Tilt-Up Hook and
Latch Connected
Tilt-Up
Tilt-Up
Latch
Hook
Deck Secured in TILT-UP Position
DANGER
Do not operate the mower with deck in tilt-
up position. Do not move the tractor with
the deck in the tilt-up position.
Cleaning
Tilt-Up Handle
Deck Lock
Lever
71