VALVE,CHECK W/THERMAL RELIEFSpecifications Item Description The Cartridge Check Valve (4641390) is a hydraulic component designed for the Lift Cylinder Assembly on JLG 450AJ and 450A aerial work platforms. This check valve cartridge controls directional flow within the main boom cylinder system, preventing backflow and maintaining system pressure. One cartridge is required per installation and is compatible with machines from serial number 0300201991 forward. Skyworks is an
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