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18
PERIODIC SERVICE
BChecking radiator hoses and clamp
CAUTION
To avoid personal injury:
A Be sure to check radiator hoses and
hose clamps periodically. If radiator
hose is damaged or coolant leaks,
overheats or severe burns could
occur.
Check to see if radiator hoses are properly fixed every
200 hours of operation or 6 months, whichever comes
first.
1. If hose clamps are loose or water leaks, tighten hose
clamp securely.
2. Replace hoses and tighten hose clamps securely, if
radiator hoses are swollen, hardened or cracked.
Replace hoses and hose clamps every 2 years or
earlier, if checked and found that hoses are swollen,
hardened or cracked.
BPrecaution at overheating
The event that the coolant temperature is nearly or more
than the boiling point is called "OVERHEATING".
While running, make the following checks to see that all
parts are working correctly. If anything is unusual,
inspect it, referring to the relevant description in
"MAINTENANCE" and "PERIODIC SERVICE" section.
C Coolant
If the coolant temperature warning lamp lights up or if
steam or coolant does not stop squirting from the
radiator overflow pipe, turn off the load and keep the
engine idling (COOLING-DOWN) for at least 5
minutes to let it cool down gradually. Then stop the
engine and take the following inspection and servicing.
1. Check to see if the coolant runs short or if there is
any coolant leak;
2. Check to see if there is any obstacle around the
cooling air inlet or outlet;
3. Check to see if there is any dirt or dust between
radiator fins and tube;
4. Check to see if the fan belt is too loose; and
5. Check to see if radiator water pipe is clogged.
BCleaning radiator core(outside)
If dust is between the fin and tube, wash it away with
running water.
BCleaning the radiator
Clean the cooling system of the engine every 500 hours.
In addition, clean it before adding anti-freeze and before
stopping use of anti-freeze.
A Do not clean radiator with firm tools such as spatulas
or screwdrivers. They may damage specified fin or
tube. It can cause coolant leaks or decrease cooling
performance.
BAnti-freeze
CAUTION
To avoid personal injury:
A When using anti-freeze, put on some
protection such as rubber gloves (Anti-
freeze contains poison.).
A If should drink anti-freeze, throw up at
once and take medical attention.
A When anti-freeze comes in contact
with the skin or clothing, wash it off
immediately.
A Do not mix different types of anti-
freeze. The mixture can produce
chemical reaction causing harmful
substances.
A Anti-freeze is extremely flammable and
explosive under certain conditions.
Keep fire and children away from anti-
freeze.
A When draining fluids from the engine,
place some container underneath the
engine body.
A Do not pour waste onto the grounds,
down a drain, or into any water source.
A Also,
observe
environmental protection regulations
when disposing of anti-freeze.
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 anti-
freeze differs according to the make of the anti-
freeze. Refer to SAE J1034 standard, more
specifically also to SAE J814c.
the
relevant
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