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Model

990431007

Model: 990431007

Series 1 - T-31A cavity, buna-N, cartridge seal kit

Cavity: T-31A

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Model

990431007

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.
  • Cavity
  • Series
  • Cartridge Thread
    M20
  • Valve Hex Size
    7/8 in.
  • Valve Installation Torque
    30 - 35 lbf ft

What models can this kit be used with?

  • DNCA 4-way, 2-position, solenoid-operated directional spool valve with closed transition
  • DNDA 4-way, 2-position, solenoid-operated directional spool valve
  • DNDAS 4-way, 2-position, soft shift, solenoid-operated directional spool valve
  • DNDC 4-way, 3-position, solenoid-operated directional spool valve
  • DNDM 4-way, manually operated, directional spool valve
  • DNDF 4-way, 2-position, solenoid-operated directional spool valve (740 Series)
  • 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
    View
  • 500-001-014
    O-Ring
    2
    D,E
  • 500-001-015
    O-Ring
    1
    C
  • 500-002-017
    O-Ring
    1
    B
  • 500-101-116
    O-Ring
    1
    A
  • 515-002-014
    Backup Ring
    4
    D,E
  • 515-002-015
    Backup Ring
    2
    C
  • 515-002-016
    Backup Ring
    1
    B

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