67PERIODIC SERVICE
1. Long-life coolant (hereafter LLC) comes in several
types. Use ethylene glycol (EG) type for this engine.
2. Before employing LLC-mixed cooling water, fill the
radiator with fresh water and empty it again.
Repeat this procedure 2 or 3 times to clean up the
inside.
3. Mixing the LLC
Put the LLC in cooling water in the percentage (%) for
a target temperature. When mixing, stir it up well, and
then fill into the radiator.
4. The procedure for the mixing of water and antifreeze
differs according to the make of the antifreeze and the
ambient temperature. Refer to SAE J1034 standard,
more specifically also to SAE J814c.
A When the antifreeze is mixed with water, the
antifreeze mixing ratio must be less than 50%.
D At 1.013 x 10 Pa (760mmHg) pressure (atmospheric).
A higher boiling point is obtained by using a radiator
pressure cap which permits the development of
pressure within the cooling system.
5. Adding the LLC
(1) Add only water if the mixture reduces in amount
by evaporation.
(2) If there is a mixture leak, add the LLC of the same
manufacturer and type in the same mixture
percentage.
D Never add any long-life coolant of different
manufacturer. (Different brands may have
different additive components, and the engine
may fail to perform as specified.)
6. When the LLC is mixed, do not employ any radiator
cleaning agent. The LLC contains anticorrosive agent.
If mixed with the cleaning agent, sludge may build up,
adversely affecting the engine parts.
7. Kubota's genuine long-life coolant has a service life of
2 years. Be sure to change the coolant every 2 years.
A The above data represent industry standards that
necessitate a minimum glycol content in the
concentrated antifreeze.
A When the coolant level drops due to evaporation, add
water only to keep the antifreeze mixing ratio less than
50%. In case of leakage, add antifreeze and water in
the specified mixing ratio before filling in to the
radiator.
BReplacing Radiator Hose (Water pipes)
Replace the hoses and clamps.
(See "Checking Radiator Hose and Clamp" in "EVERY
200 HOURS" in "PERIODIC SERVICE" section.)
BReplacing Power Steering Hose
Consult your local KUBOTA Dealer for this service.
BReplacing Fuel Hose
Consult your local KUBOTA Dealer for this service.
BReplacing Intake Air Line
Consult your local KUBOTA Dealer for this service.
SERVICE AS REQUIRED
BBleeding Fuel System
Air must be removed:
1. When the fuel filter or lines are removed.
2. When water is drained from water separator.
3. When tank is completely empty.
4. After the tractor has not been used for a long period of
time.
C Bleeding procedure is as follows:
1. Fill the fuel tank with fuel, and open the fuel cock.
2. Open the air vent cock on the fuel injection pump.
Vol %
Anti-freeze
Freezing Point Boiling Point*
40
50
-24
-37
-12
-34
106
108
222
226
(1) Fuel cock (A) "CLOSE"
(B) "OPEN"
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