Kubota D1503-M Workshop Manual page 62

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM
Changing Radiator Coolant (L.L.C.) (Continued)
(Anti-freeze)
• There are two types of anti-freeze available: use the permanent
type (PT) for this engine.
• Before adding anti-freeze for the first time, clean the radiator
interior by pouring fresh, soft water and draining it a few times.
• The procedure for mixing water and anti-freeze differs according
to the make of the anti-freeze and the ambient temperature.
Basically, it should be referred to SAE J1034 standard, more
specifically also to SAE J814c.
• Mix the anti-freeze with fresh, soft water, and then fill into the
radiator.
IMPORTANT
• When the anti-freeze is mixed with fresh, soft water, the anti-
freeze mixing ratio must be less than 50 %.
Freezing point
Vol %
anti-freeze °C
40 –24
50 –37
* At 1.01 × 100000 Pa (760 mmHg) pressure (atmospheric). A
higher boiling point is obtained by using a radiator pressure cap
which permits the development of pressure within the cooling
system.
NOTE
• The above data represents industrial standards that
necessitate a minimum glycol content in the concentrated
anti-freeze.
• When the coolant level drops due to evaporation, add fresh,
soft water only to keep the anti-freeze mixing ratio less than
50 %. In case of leakage, add anti-freeze and fresh, soft
water in the specified mixing ratio.
• Anti-freeze absorbs moisture. Keep unused anti-freeze in a
tightly sealed container.
• Do not use radiator cleaning agents when anti-freeze has
been added to the coolant.
(Anti-freeze contains an anti-corrosive agent, which will
react with the radiator cleaning agent forming sludge which
will affect the engine parts.)
G-37
G GENERAL
Boiling point*
°F °C
–11 106
–35 108
KiSC issued 07, 2008 A
°F
223
226
W1024852