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Turn on the sweeper main switch and lift the engine hood. Make sure the coolant level is between the marks on the coolant reservoir (transparent tank).
Refill at top of expansion tank if needed.
WARNING!
Take care when working above ground level. Risk of falling.
WARNING!
Allow the engine to cool down before opening the cap! The coolant system is pressurized, especially when the engine is hot. Risk of burn injuries!
Carefully unscrew the cap and refill coolant up to the mark.