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20
MAINTENANCE
Always use a 50/50 mix of long-life coolant and clean soft
water in KUBOTA engines.
Contact KUBOTA concerning coolant for extreme
conditions.
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, flush the
radiator with fresh water. Repeat this procedure 2 or 3
times to clean up the radiator and engine block from
inside.
3. Mixing the LLC
Premix 50% LLC with 50% clean soft water. 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. Refer
to SAE J1034 standard, more specifically also to SAE
J814c.
Freezing Point
Vol %
Antifreeze
50
-37
*At
1.013
x
10 Pa
(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 coolant level reduces in the
cooling system by evaporation.
(2) If there is a coolant leak, add the LLC of the same
manufacturer and type in the same coolant
percentage.
*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 anti-corrosive
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 represents industry standards that
necessitate
minimum
concentrated antifreeze.
BChecking fan belt
(See "Adjusting fan belt tension" in "EVERY 250
SERVICE HOURS" in "REGULAR CHECKS AND
MAINTENANCE WORK" section.)
Boiling Point *
-34
108
226
(760
mmHg)
pressure
glycol
content
in
the
BFor the air cleaner with a dust cup
(optional)
Remove and clean out the dust cup before it becomes
half full with dust; usually once a week, or even every day
if the working surroundings are dusty.
Install the air cleaner dust cup with "TOP" indicated on the
rear of the cup in the up position. (However, it may be
installed in either direction when the cover is placed at the
lower part.)
A If the dust cup is mounted incorrectly, dust or dirt does
not collect in the cup, and direct attachments of the
dust to the element will cause its lifetime to shorten to
a great extent.
(1) Air cleaner body
(2) Element
(3) Wing bolt
(4) Dust cup
(5) "TOP" mark
BDust indicator (optional)
If the red signal on the dust indicator attached to the air
cleaner is visible, the air cleaner has reached the service
level.
Clean the element immediately, and reset the signal with
the "RESET" button.
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