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Piston Seals

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  • Type 1
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.25, 0
    • Bore Diameter (mm)
      114.30, 0
    • Groove Width - A (± 0.002 in) (mm)
      6.40, 0
    • Seal Shape
      0, Type 1
    • Grove Diameter - B (± 0.003 in) (in)
      0, 3.84
    • Grove Diameter - B (± 0.003 in) (mm)
      97.41, 0
    • Groove Width - A (± 0.002 in) (in)
      0.25, 0
    • Bore Diameter (mm)
      114.30, 0
    Compare
  • Piston Seal Assembly
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0, 0.19
    • Bore Diameter (mm)
      0, 101.50
    • Groove Width - A (± 0.002 in) (mm)
      0, 4.88
    • Seal Shape
      Type 1, 0
    • Height(in)
      0.1, 0
    • Weight (lbs)
      0, 0.1
    • Groove Width - A (± 0.002 in) (in)
      0, 0.19
    • Bore Diameter (mm)
      0, 101.50
    Compare
  • Type 1
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      4.88, 0
    • Bore Diameter (mm)
      0, 76.20
    • Groove Width - A (± 0.002 in) (mm)
      0, 0.19
    • Seal Shape
      Type 1, 0
    • Grove Diameter - B (± 0.003 in) (in)
      62.48, 0
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 2.46
    • Groove Width - A (± 0.002 in) (in)
      4.88, 0
    • Bore Diameter (mm)
      0, 76.20
    Compare
  • Type 1
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      0, 215.90
    • Groove Width - A (± 0.002 in) (mm)
      0, 9.63
    • Seal Shape
      Type 1, 0
    • Grove Diameter - B (± 0.003 in) (in)
      7.51, 0
    • Grove Diameter - B (± 0.003 in) (mm)
      190.63, 0
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      0, 215.90
    Compare
  • Type 3
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.63, 0
    • Bore Diameter (mm)
      177.80, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 15.98
    • Seal Shape
      Type 3, 0
    • Grove Diameter - B (± 0.003 in) (in)
      6.09, 0
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 154.81
    • Groove Width - A (± 0.002 in) (in)
      0.63, 0
    • Bore Diameter (mm)
      177.80, 0
    Compare
  • Type 3
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.63, 0
    • Bore Diameter (mm)
      215.90, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 15.98
    • Seal Shape
      0, Type 3
    • Grove Diameter - B (± 0.003 in) (in)
      7.51, 0
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 190.63
    • Groove Width - A (± 0.002 in) (in)
      0.63, 0
    • Bore Diameter (mm)
      215.90, 0
    Compare
  • Type 3
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      170.00, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 9.63
    • Seal Shape
      Type 3, 0
    • Engineering Design Control Code
      J408
    • Grove Diameter - B (± 0.003 in) (in)
      5.93, 0
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      170.00, 0
    Compare
  • Type 3
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0, 0.38
    • Bore Diameter (mm)
      180.00, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 9.63
    • Seal Shape
      Type 3, 0
    • Grove Diameter - B (± 0.003 in) (in)
      6.32, 0
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 160.62
    • Groove Width - A (± 0.002 in) (in)
      0, 0.38
    • Bore Diameter (mm)
      180.00, 0
    Compare
  • Type 3
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0, 0.63
    • Bore Diameter (mm)
      0, 215.90
    • Groove Width - A (± 0.002 in) (mm)
      0, 15.98
    • Seal Shape
      0, Type 3
    • Grove Diameter - B (± 0.003 in) (in)
      0, 7.51
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 190.63
    • Groove Width - A (± 0.002 in) (in)
      0, 0.63
    • Bore Diameter (mm)
      0, 215.90
    Compare
  • Type 3
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      200.00, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 9.63
    • Seal Shape
      Type 3, 0
    • Grove Diameter - B (± 0.003 in) (in)
      6.88, 0
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 174.73
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      200.00, 0
    Compare
  • Type 1
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      196.85, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 9.63
    • Seal Shape
      Type 1, 0
    • Grove Diameter - B (± 0.003 in) (in)
      0, 6.84
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 173.86
    • Groove Width - A (± 0.002 in) (in)
      0.38, 0
    • Bore Diameter (mm)
      196.85, 0
    Compare
  • Type 4
    Availability
    Brand
    Cat
    • Groove Width - A (± 0.002 in) (in)
      0, 0.63
    • Bore Diameter (mm)
      139.70, 0
    • Groove Width - A (± 0.002 in) (mm)
      0, 15.98
    • Seal Shape
      Type 4, 0
    • Grove Diameter - B (± 0.003 in) (in)
      0, 4.73
    • Grove Diameter - B (± 0.003 in) (mm)
      0, 120.02
    • Groove Width - A (± 0.002 in) (in)
      0, 0.63
    • Bore Diameter (mm)
      139.70, 0
    Compare
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  • Products
Caterpillar is committed to providing our customers with the most reliable piston seals available for construction and mining equipment, diesel and natural gas engines, industrial gas turbines and locomotives. You can count on Cat® Parts to deliver durable and long-lasting seals that will prevent machine damage and assure optimal machine performance.
Over 200 Piston Seals of Various Bore Diameter, Grove Width and Shape Cat® Two-Piece Piston Seals consist of a piston ring and an expander that prevents oil transfer between the rod end of the cylinder and the cap end. The piston seal is usually made of Teflon, with nylon available for pressure greater than 3000 psi (20,670 kpa). The various shaped expanders are nitrile.
Need advice on the best piston seal for your machine? Contact your nearby Cat Dealer for expert advice and 100% support.