Section 8
High Pressure Water System
20479291
2-2012/Rev 04
8-20
Figure 8-15: Hydraulic Cartridge Seal Removal
9. With the cartridge removed, the plunger can now be removed with the hydraulic cylinder
head in place. The plunger is held in position by six retainer pins. The pins close around
the plunger button to retain the plunger, and retract to release the plunger.
Clean the plunger and the ID of the collet with alcohol or a similar solvent. Partially
thread the collet into the plunger removal tool and slide the removal tool over the plunger
with the lobed end toward the plunger button. Note the orientation of the retainer pins on
the plunger button. Align the lobes on the tool with the retainer pins as shown below.
Tighten the collet and rotate the tool slightly, causing the pins to retract and release the
plunger. Remove the plunger from the hydraulic piston.
Figure 8-16: Plunger Retainer Pins
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