Husky Unify - Replacing the Hydraulic and Pneumatic Seals; Removing and Installing Valve Stems; Removing a Valve Stem

6.8 Replacing the Hydraulic and Pneumatic Seals
The life of hydraulic or pneumatic actuator seals will decrease if the system operates outside of
the operating limits.
The following options are available if hydraulic or pneumatic actuator seals need to be replaced.
Contact Husky for more information.
• Order new pre-assembled actuators, which have been fully tested, from Husky.
• Husky can refurbish the actuator.
• Husky can replace the seals or a seal kit that includes new seals can be ordered from Husky.
NOTE:
It is recommended that Husky performs the actuator seal replacement.
Instructions on disassembling the actuator and installing the new seals are included in the seal
kit.
Actuator Type Part Description Part Number
Small Hydraulic Seal Kit 7296393
Large Hydraulic Seal Kit 6735248
Small and Large Hydraulic Tool Kit - Not included in the seal kit 6618499
Small Pneumatic Seal Kit 6990407
Large Pneumatic Seal Kit 6990408
Small and Large Pneumatic Outer Piston Seal 6718718
O-ring Piston 212808
Outer Rod Seal 671824
O-ring Rod 642805
6.9 Removing and Installing Valve Stems
The following procedures describe how to remove and install the valve stems.
6.9.1
Removing a Valve Stem
To remove a valve stem, do the following:
v 2.2 — March 2021 Unify Manifold System
78 Replacing the Hydraulic and Pneumatic Seals