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

Technical Features [ + ]

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 twenty years from date of purchase. This date will be printed on the kit packaging.
Technical Data [ + ]
Series 4
Installation Torque 350 - 375 lbf ft474 - 508 Nm
Cartridge Thread M48M48
Valve Hex Size 1 5/8 in.41,3 mm
Cavity T-54A
Used With [ + ]

What models can this kit be used with?

  • DDHC 4-way, 3-position, pilot-to-shift directional valve
  • DDHG 3-way, 2-position, pilot-to-shift, directional valve
  • FTHC 4-way, 3-position, meter in proportional directional valve
  • FTHH
    3-way, 3-position, proportional directional valve with center bleed down
Notes [ + ]
  • 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.
Additional Resources [ + ]