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The first generation manual does not have the info.
The second generation manual that includes the Cab has the info on p.56 and is available on Renntech as a pdf.
With Engine compartment temp under 122°F
Extends at 75 mph
Retracts at 37 mph
With engine compartment temp over 140°F
Extends at 50mph
Retracts at 19mph
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