Preventive maintenance
102 811390 Operator Manual DynaMAX 550P/560P/575P Waterjet Pump
8. Put the nonstepped end of the push tool against the spacer tube and tap on the end of the push
tool with a rubber mallet to push the seal and the hoop out of the high-pressure cylinder.
9. Take the spacer tube out of the cylinder.
10. Disassemble all of the parts.
Remove the plunger bearing and the seal housing assembly
Parts, tools, and materials
Replace the plunger bearings:
• every 3,000 hours
• when replacing the high-pressure cylinder
Replace the seal housing assemblies every 6,000 hours.
Remove the proximity switch from the hydraulic end cap to make this procedure easier.
1 High-pressure seal backup (bronze)
2 Seal housing
3 Hydraulic rod seal, 1 inch
4 Plunger bearing
Clean towels
Isopropyl alcohol
Two 10-32 stainless steel screws
(to remove the plunger bearing)
Seal housing removal tool
1/8-inch hex wrench
(for the seal housing removal tool)
O-ring pick (or similar tool)
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