Kubota D1803-CR-E4, Workshop Manual

Page: 97 / 309

12. Check the coolant level of radiator and reserve tank
(4) and add coolant if necessary.
Anti-freeze
NOTE
• There are 2 types of anti-freeze available:
use the permanent type (PT) for this engine.
• When you add anti-freeze for the first time,
flush the water jacket and radiator interior
with clean, soft water several times.
• The brand of the anti-freeze and the ambient
temperature have an effect on the procedure
to mix water and anti-freeze.
Refer to the SAE J1034 standard, especially
to the SAE J814c.
• Mix the anti-freeze with clean, soft water,
and then fill into the radiator.
IMPORTANT
• Make sure that when you mix the anti-freeze
and water, the ratio of anti-freeze is less than
50%.
Anti-
freeze
volume
Freezing point Boiling point
*
℃ ℉ ℃ ℉
40% -24 -11 106 223
50% -37 -35 108 226
* At 1.01 × 100000 Pa (760 mmHg) pressure (atmospheric). Use
a radiator pressure cap that lets the pressure collect in the
cooling system to get a higher boiling point.
NOTE
• The above data is the industrial standards
that shows the minimum glycol content
necessary in the concentrated anti-freeze.
• When the coolant level decreases because
of evaporation, add clean, soft water only to
keep the anti-freeze mixing ratio less than
50%.
If there is a leakage, add anti-freeze and
clean, soft water in the specified mixing
ratio.
• The anti-freeze absorbs moisture. Keep new
anti-freeze in a tightly sealed container.
• Do not use the radiator cleaning agents after
you add anti-freeze to the coolant.
Anti-freeze contains an anti-corrosive agent,
which reacts with the radiator cleaning
agent to make sludge and cause damages to
the engine parts.
11.9 Replacing radiator hose and
clamp bands
CAUTION
• Do not remove the radiator cap when the engine
is hot.
Then loosen the cap slightly to release
unwanted pressure before you remove the cap
fully.
1. Drain the coolant.
2. Loosen the clamp bands.
3. Remove the upper hose (1) and lower hose (2).
(1) Upper hose (2) Lower hose
4. Replace the upper / lower hose (1), (2) and clamp
bands with new ones.
5. Tighten the clamp bands correctly.
3. MAINTENANCE
CHECK AND MAINTENANCE
11.Check points of every 2 years
3-30
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
KiSC issued 12, 2018 A