• Piston fish scale retainer plate replacement for Massey Ferguson MF1839 and MF1840 small square hay balers, compatible with 2008‑2025 production years, matches original bale chamber mounting specification.
  • Made of high-grade 65Mn spring steel with stamping forming and blackening rust-proof surface, excellent elasticity, wear and fatigue resistance, withstands high-frequency reciprocating extrusion friction during compression cycles.
  • Standard mounting hole positions and tooth angle match original bale chamber inner wall, direct installation without extra modification, adjustable angle to fine-tune bale density and squareness.
  • Mounted on both sides of the bale chamber, allows straw to pass through during forward piston stroke, and engages to hold straw and prevent backflow during piston return stroke, ensures tight and uniform bale filling.
  • Ideal substitute for worn, deformed or failed retainer plate to fix straw backflow, loose bales and uneven bale shape issues, restores bale chamber non-return performance and improves overall bale quality.






    • Huarui-Machine

    Huarui-Machine is a professional manufacturer and supplier of aftermarket agricultural machinery spare parts based in China.
    We focus on producing high-performance replacement components for farm tractors, combine harvesters, balers and tillage equipment.

    Our wide product range covers engine parts, hydraulic components, wear parts, transmission parts, seals, filters, bearings and other agricultural consumables.
    Our spare parts are compatible with agricultural machines from AGCO, New Holland, John Deere, Case IH, Claas, Massey Ferguson, Valtra, Kubota, Yanmar, Deutz-Fahr, Kuhn and Lemken.

    Equipped with complete machining, casting, forging and heat-treatment workshops, we implement strict quality inspection procedures throughout production.
    All products are manufactured according to standard dimensional specifications to ensure stable performance and long service life under tough farming working conditions.

    We support bulk wholesale, customized processing and flexible order solutions for global agricultural dealers, repair workshops and farming contractors.
    With competitive factory-direct pricing, stable supply and reliable after-sales support, Huarui-Machine strives to provide cost-effective aftermarket spare parts solutions for farmers all over the world.

    Notice    : All items are aftermarket replacement parts. We are not affiliated with the above-mentioned machinery brands.
    All brand names are only used to indicate compatibility.