4. The procedure for the mixing of water and anti-
freeze differs according to the make of the anti-
freeze and the ambient temperature. Refer to SAE
J1034 standard, more specifically also to SAE
J814c.
IMPORTANT :
• When mixing the antifreeze with water, the
antifreeze mixing ratio is 50%.
Vol%
Antifreeze
Freezing point
Boiling point
℃
℉
℃
℉
50
-37
-34
108
226
*
At 1.013 x 10
5
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.
5. Adding the LLC
a. Add only water if the coolant level reduces in
the cooling system by evaporation.
b. If there is a mixture leak, add the LLC of the
same manufacturer and type in the mixing ratio
50%.
IMPORTANT :
• 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
2000 hours or every 2 years whichever comes
faster.
NOTE :
• The
above
data
represent
industry
standards that necessitate a minimum glycol
content in the concentrated antifreeze.
EVERY 3000 HOURS
1. Checking injection pump
Consult your local KUBOTA Dealer for this service.
EVERY 1 YEAR
1. Checking fuel lines
If you feel you are unable to make the following service
correctly and safely, contact your local KUBOTA Dealer.
(See Checking the fuel filter on page 70.)
2. Checking radiator hose and clamp
WARNING
To avoid serious injury or death:
• Be sure to stop the engine and remove the key
before checking radiator hose and clamps.
If you feel you are unable to make the following service
correctly and safely, contact your local KUBOTA Dealer.
1. If hose clamps are loose or water leaks, tighten
clamps securely.
2. Replace hoses and tighten hose clamps securely. If
radiator hoses are swollen, hardened or cracked,
replace them immediately.
(1) Radiator core
(2) Radiator hose
3. Checking hydraulic hoses
WARNING
To avoid serious injury or death:
• Be sure to stop the engine and remove the key
before checking and replacing the hydraulic
hose.
• Allow the transmission case to cool down
sufficiently as oil can be hot and may cause
burns.
• Escaping hydraulic fluid under pressure has
sufficient force to penetrate the skin causing
serious personal injury. Before disconnecting
lines, be sure to relieve all pressure.
MAINTENANCE
EVERY 3000 HOURS
82
ZD1211,ZD1221
