Section 8
High Pressure Water System
20425618
5-2005/Rev 0
8-34
Figure 8-22, Pneumatic Valve Seal Tools, illustrates the special seal tools recommended for this
procedure.
Figure 8-22: Pneumatic Valve Seal Tools
Pneumatic Control Valve
For reliable operation, it is recommended that the valve seat, seal assembly, brass backup ring and
stem always be replaced at the same time. The SST backup ring can be reused.
Severe injury can result if the machine is not properly locked out. Observe
electrical Lockout/Tagout procedures before proceeding.
Ensure all pressure is relieved or blocked from the hydraulic and high pressure
circuits before proceeding.
1. Turn the air supply off.
2. Remove the air supply hose, and the electrical connection to the solenoid valve.
3. Loosen and remove the high pressure gland connection and the drain connection.
4. Remove the valve and actuator assembly from the machine.
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