Kubota R430, Operator'S Manual

Page: 94 / 112

6. Finally, do not forget to open the shutoff-valve after
drain of the water has been over.
(1) Screw
(2) Cup
(3) Shutoff-valve
(4) Float
(5) Drain plug
(6) Connector of water level
sensor
(A) Close
(B) Open
(C) Loosen
(D) Tighten
NOTE :
• Before detaching the cup, unplug the
connector of the water-level-sensor. When
the cleaning is complete, make sure to set
the connector of the water-level-sensor.
IMPORTANT :
• Use light oil or wash oil for cleaning.
• In reattaching the water separator, be careful
to keep off dust and dirt.
• Be sure to purge the fuel system before
getting the machine restarted.
(See Bleeding the fuel system on page 90)
IMPORTANT :
• After draining the fuel filter, bleed the fuel
system as soon as possible.
(See Bleeding the fuel system on page 90)
4. Bleeding the fuel system
WARNING
To avoid personal injury or death:
• Keep sparks and flames away from the fuel, or
serious personal injury may result.
After the fuel tank has been run empty or maintenance
and service work has been carried out, the engine
cannot be started again after refueling. This is because
air has entered the fuel system. It is thus necessary to
bleed the fuel system in the procedure in this section.
Also after replacing the fuel filter, bleed the fuel system.
1. Fill the fuel tank with fuel.
2. Turn the starter switch to the [RUN] position.
The fuel pump starts working to supply fuel into the
line. About 10 seconds later, the air will be bled out
from the line.
3. Start the engine.
NOTE :
• The engine may sometimes stall after
starting if air bleeding was not complete. If
engine stalling should occur, repeat step 2
and step 3.
• If it is not easy to bleed the air, press the
priming pump of engine repeatedly until it
feels heavy.
5. Bleeding the air from the brake
fluid system
WARNING
To avoid personal injury or death:
• For bleeding the air from the brake fluid system,
stop the engine, set the parking-brake-switch to
the parking position, lower the bucket and
attachment to the ground, release the hydraulic
pressure in the hydraulic system by operating
control levers, lock all control levers in neutral,
and remove the starter key.
• Only use the hydraulic oil that meets ISO VG 32
or VG 22. Use of incorrect hydraulic oil obtains
potential of brake failure and will cause damage
of brake parts.
Bleed the air from the brake circuit after disassembling
and repairing the brake or when the brake fluid falls too
low, allowing air inside the brake system.
Bleeding the air from the brake circuit requires two
workers.
1. Fill the brake-fluid-reservoir with only the following
hydraulic oil.
Hydraulic oil ISO VG 32 or VG22
Make sure that the brake-fluid-reservoir is always
half full or more during air-bleeding.
2. Remove the cap from the air-bleeding plugs located
on the axle housing.
3. Connect a vinyl tube about 1 meter long to the air-
bleeding plugs and place the other end of the vinyl
tube in an oil catcher.
4. Loosen the air-bleeding plugs with a wrench and
press the brake pedal gradually to bleed the air.
5. Repeat step 4. until bubbles no longer emerge from
the vinyl tube, then slowly release the brake pedal.
6. If air is not fully bled by one operation, repeat step
4. and step 5.
PERIODIC SERVICE SERVICE AS REQUIRED
90
R430