Kubota WSM 07-E3B Series Workshop Manual page 47

07-E3B SERIES, WSM
(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 1.013 × 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.)
Replacing Radiator Hoses and Clamp Bands
CAUTION
• Do not remove the radiator cap when the engine is hot. Then
loosen cap slightly to the stop to relieve any excess
pressure before removing cap completely.
1. Drain the coolant.
2. Loosen the clamp bands.
3. Remove the upper hose (1) and lower hose (2).
4. Replace new upper / lower hose (1), (2) and clamp bands.
5. Tighten the clamp bands.
6. Fill with clean water and anti-freeze until the coolant level is just
below the port. Install the radiator cap securely.
(1) Upper Hose
G-29
G GENERAL
Boiling point*
F C
–11 106
–35 108
W1024852
(2) Lower Hose
W1024178
KiSC issued 06, 2020 A
F
223
226