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Model

990054002

Model: 990054002

Series 4 - T-54A cavity, Polyurethane cartridge seal kit

Cavity: T-54A

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Model

990054002

See CAD Files tab below to request images.

Technical specifications

Sun offers replacement seal kits for all cartridge models. These kits include all of the external seals on the cartridge along with installation instructions. Seal kits are available in Buna-N and Viton for all models, along with EPDM and polyurethane for many models. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.

  • The shelf life for this cartridge seal kit is ten years from date of purchase. This date will be printed on the kit packaging.
  • Polyurethane seals have a higher tensile strength, are more abrasion/extrusion resistant, and are well suited for high cycle and high pressure applications.
  • Cavity
  • Series
  • Cartridge Thread
    M48
  • Installation Torque
    350 - 375 lbf ft
  • Valve Hex Size
    1 5/8 in.

What models can this kit be used with?

  • DDHG 3-way, 2-position, pilot-to-shift, directional valve
  • FTHC 4-way, 3-position, meter in proportional directional valve
  • Install back-up rings and O-rings as shown in views.
  • When installing continuous back-up rings, use the same technique and the same care used to install O-rings.
  • When installing cartridge - be sure to torque to recommended value.
  • Part
    Description
    Quantity
  • 500-202-127
    O-Ring
    1
  • 500-202-128
    O-Ring
    2
  • 500-202-129
    O-Ring
    1
  • 500-202-131
    O-Ring
    1
  • 500-202-134
    O-Ring
    1
  • 540-002-127
    Backup Ring
    2
  • 540-002-128
    Backup Ring
    4
  • 540-002-129
    Backup Ring
    2
  • 540-002-131
    Backup Ring
    1
  • 540-002-134
    Backup Ring
    1

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