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The CCS fan and vacuum system is designed to operate on tractors that have the capability of controlling hydraulic flow rates from the cab (to control vacuum level).
An in-line flow control valve must be used when vacuum system is connected to the following:
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Power beyond circuit.
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Dual vacuum motors are installed and controlled with one SCV.
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Connected to a tractor without the capability of controlling hydraulic flow rates from the cab. See your John Deere dealer.
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