The Hendrickson Down/Lock Valve, part number R-017520-00 or R01752000, is a replacement down/lock valve designed for differential lock relay valve applications on heavy-duty suspension and driveline systems. This valve fits within the differential lock relay category and carries the alternate catalog reference HIR-017520-00. Dimensions measure 12.001 inches in length, 3.23 inches wide, and 3.64 inches in height, making fitment verification straightforward before installation. Pro Gear and Transmission carries this genuine Hendrickson part. Call us to confirm proper fit for your specific axle configuration.FeaturesGenuine Hendrickson replacement down/lock valvePart number R-017520-00 or R01752000; alternate reference HIR-017520-00Differential lock relay valve applicationDimensions: 12.001 in. length x 3.23 in. width x 3.64 in. heightSold individually (unit of measure: each)Tech SpecsLength: 12.001 in.Width: 3.23 in.Height: 3.64 in.Application: Differential Lock Relay ValveCross-Reference: HIR-017520-00Unit of Measure: Each