Section 8
High Pressure Water System
20425618
5-2005/Rev 0
8-24
Slide the removal tool over the plunger with the hex shaped end toward the plunger
button. Note the orientation of the retainer pins on the plunger button. Align the hex flats
on the tool with the retainer pins and force the tool, by hand or with a dead blow hammer,
under the pins. Rotate the tool slightly, causing the pins to retract and release the plunger.
The plunger can now be removed from the hydraulic piston.
Figure 8-15: Plunger Retainer Pins
Plunger Maintenance
Plunger surfaces can become streaked with longitudinal scratches or flaws, and discolored or dull
in appearance. If any of these conditions become severe, the high pressure seal assembly and
possibly the hydraulic cartridge seal will leak.
Accumulation of debris on the surface of the plunger can be removed by polishing in a radial
direction with 600-grit sandpaper. However, plunger surface flaws usually cannot be repaired on
site. The plunger can be returned to KMT Waterjet for reconditioning.
Figure 8-16: Plunger
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