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John Deere – 1023E, 1025R and 1026R – Remove and Install Thermostat

[1] – Park machine safely.

[2] – Allow engine to cool before servicing the cooling system.

[3] – Open radiator cap.

[4] –
→NOTE:

Place a suitable container under radiator drain hose. Open radiator drain valve (A) and drain the coolant.

[5] – Disconnect crankcase ventilation hose from tee in intake air hose. Disconnect air intake hose from turbocharger and remove air cleaner assembly.

[6] – Loosen clamp. Remove upper radiator hose from thermostat housing.

[7] – Remove two cap screws (B) holding thermostat housing to water pump. Remove housing (C) and gasket.

[8] – Remove thermostat.

[9] – Test or replace thermostat. Install thermostat with spring facing down.

[10] – Install new gasket.

[11] – Install housing. Tighten cap screws to specifications.

[12] – Close drain valve. Fill radiator with proper coolant to top of filler neck.

[13] – Fill coolant reservoir between the full cold and full hot marks.

[14] – Start engine. Allow it to reach proper operating temperature. Check radiator, hoses, and connections for leaks. Allow engine to cool, then check and adjust coolant level in recovery tank as needed.