New Holland Workmaster 25S, Operator'S Manual, Page: 138 / 208

7 - MAINTENANCE
Engine cooling system - Basic instructions
Definition
Organic Acid Technology (OAT) coolant
A coolant that relies on inhibitors such as organic acid salts for corrosion and cavitation protection.
NOTICE: You should not mix OAT coolant with conventional coolant. Mixing OAT coolant with conventional coolant
will reduce the effectiveness of OAT coolant.
NOTE: If you need to change a machine from conventional coolant to OAT coolant or vice versa, you should follow
the “Changing coolant types” procedure below to attain the full benefit of the coolant.
Changing coolant types
To change coolant from OAT coolant to conventional
coolant (or vice versa)
1. Empty the engine cooling system by draining the
coolant into a suitable container.
2. Fill the system with clean water.
3. Start the engine and run for at least 30 min .
4. Repeat Steps 1 to 3, for a total of two washes.
5. Fill the system with conventional coolant (or OAT
coolant).
6. Operate the engine until it is warm. Inspect the ma-
chine for leaks.
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