New Holland T4.75F Operator's Manual page 197

Flushing the system (models without cab)
WARNING
2.
Hot surface possible!
Wait for all components to cool before per-
forming any operation.
Failure to comply could result in death or
serious injury.
Flush at least every 1200 hours of work or every 2 years
and whenever switching from or to the anti-freeze mix-
ture.
Proceed as follows:
• Remove the expansion tank cap (1) fig. 1, then re-
move the radiator hose (1) fig. 2 and drain off the
fluid while the engine is cold;
• Put the radiator cap back on and fill the radiator with
a filtered solution of Solvay soda and water at a ratio
of 250 g (8.8 oz) of soda to every 10 l (2.2 UK gal)
2.70 US gal of water;
• Run the tractor for about an hour. Wait for the engine
to be cold, then drain the cleaning solution from the
radiator plug (2);
• then run pure water through it by pouring it into the
radiator and leaving it to drain through the radiator
plug (2) fig. 2;
• Replace the radiator plug, fill with water, run the en-
gine for a few minutes and drain the system;
• Leave the engine to cool, then fill the radiator with
a mixture of water and F
fluid, and close the radiator cap.
ATTENTION: The engine must be switched off when drain-
ing the water.
Thermostat
3. There is a thermostat in the cooling circuit to prevent
the water circulating in the radiator until the water
reaches a high enough temperature to allow the en-
gine to operate correctly (approx. 85 °C (185.0 °F). If
doubts arise concerning thermostat operation, remove
the part and have it checked by skilled personnel.
7 - MAINTENANCE
W0251A
® C
LEETGUARD OMPLEAT
™
7-43
2
DCSPVNEGB060S7A