Unknown 6-400-175A 79966 Seals & Packings Kit Repair (Inspect Pictures)

The item shown is a Seal & Packing Repair Kit labeled as 6-400-175A / 79966, intended for hydraulic cylinder or actuator repair. These kits are typically used to restore sealing integrity in heavy-duty hydraulic equipment by replacing worn seals, O-rings, and packings that prevent fluid leakage and maintain system pressure. Technical Specifications: Part Number: 6-400-175A (alternate marking 79966) Product Type: Hydraulic Cylinder Seal & Packing Repair Kit Components Included: Multiple O-rings, wear rings, backup rings, and sealing elements (as shown in second image) Application: Hydraulic cylinders in construction equipment, industrial machinery, and heavy-duty mobile hydraulics Material Composition: O-rings: Nitrile (Buna-N) or Viton (depending on kit specification) Backup rings: PTFE or nylon for extrusion resistance Wear rings: Reinforced polymer or composite material U-cups / lip seals: High-performance polyurethane or nitrile rubber Operating Pressure Range: Designed for high-pressure hydraulic systems up to 3000–5000 psi (depending on equipment application) Temperature Range: -30°C to +120°C (-22°F to +248°F) depending on material selection Fluid Compatibility: Mineral oils, water-glycol, synthetic hydraulic fluids, and fire-resistant fluids (depending on seal material) Function: Restores proper sealing performance of hydraulic cylinder rods and pistons, preventing leakage and ensuring smooth operation Service Life: Designed for extended durability under severe duty cycles, reducing downtime and maintenance costs Manufacturer: Unknown (custom kit packaging, possibly aftermarket or distributor-assembled) Country of Manufacture: Not specified (likely USA distributor kit based on packaging style) Please review pictures carefully and let us know if you have any questions!