Section 8
High Pressure Water System
20479291
2-2012/Rev 04
8-9
High Pressure Cylinder Assembly Removal
Prior to removing electrical power or any high or low pressure piping, start the machine and
extend the plunger on the end to be serviced to allow full exposure when the unit is disassembled.
1. Turn the machine off and observe the appropriate Lockout/Tagout procedures.
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.
2. Disconnect the high and low pressure water piping, following the procedure, High and
Low Pressure Water Piping.
Due to the weight of the cylinder assembly, adequate support must be provided to
prevent damage to the plunger or seals during removal and installation. See Figure
8-7, Specialized Maintenance Tools for tools available to support the high pressure
assembly for this procedure.
3. Position the vee block cradle tool under the cylinder assembly. Unthread and remove the
assembly from the hydraulic cylinder head and plunger. The assembly can be rotated with
the cylinder wrench or by hand.
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