MacDon M155 Unloading And Assembly Instructions page 271

The additive package must be part of one of the following coolant mixtures:
•
Ethylene glycol or propylene glycol base prediluted (40–60%) heavy duty coolant.
•
Ethylene glycol or propylene glycol base heavy duty coolant concentrate in a 40–60% mixture of concentrate
with quality water.
Water quality is important to the performance of the cooling system. Distilled, deionized, or demineralized water is
recommended for mixing with ethylene glycol and propylene glycol base engine coolant concentrate.
IMPORTANT:
Do NOT use cooling system sealing additives or antifreeze that contains sealing additives.
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REFERENCE
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Revision A