Operating Instructions Operating & Maintenance Manual
57
IMPORTANT: Do not use cooling system sealing additives or antifreeze that contains
sealing additives.
Supplemental Coolant Additives
The concentration of coolant additives is gradually depleted during engine operation. For all
recommended coolants, replenish additives between drain intervals by adding a supplemental
coolant additive every 12 months.
IMPORTANT: Only use coolant additive to replenish the coolant. Do not use additive
when the entire system is drained and refilled.
Consult the coolant supplier and follow the manufacturer's recommendation for use of
supplemental coolant additives.
The use of non-recommended supplemental coolant additives may result in additive drop-out
and gelation of the coolant.
Add the manufacturer's recommended concentration of supplemental coolant additive. DO
NOT add more than the recommended amount.
Coolant Drain Intervals
Drain the factory fill engine coolant, flush the cooling system, and refill with new coolant after
the first 3 years or 3000 hours of operation. Subsequent drain intervals are determined by the
coolant used for service. At each interval, drain the coolant, flush the cooling system, and refill
with new coolant.
Chlorides <40mg/L
Sulfates <100 mg/L
Total Dissolved Solids <340 mg/L
Total Hardness <170 mg/L
pH 5.5 to 9.0
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