Quick view Add to Cart Overhaul Instructions with Parts Breakdown for Four-Way, Two-Position, Manual Control Hydraulic Valve - Part 28500 Document Part Number: NAVAER 03-30ET-510 Number of pages: 4Part Number: NAVAER 03-30ET-510Revision Date: 15-Sept-1955Description: Mfg By: Hydraulic Research MSRP: Was: Now: $15.00