Hypertherm HyPrecision Predictive P-15 Operator's Manual page 102

5 – Preventive maintenance
8. Take the spacer tube out of the cylinder.
9. Disassemble all of the parts.
Remove the plunger bearing and the seal housing assembly
Replace the plunger bearings:
• every 3,000 hours
• when replacing the high-pressure cylinder
Replace the seal housing assemblies every 6,000 hours.
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2 2
3
1 1-11610 High-pressure seal backup (bronze)
2 1-11609 Seal housing
Parts, tools, and materials
Clean towels
Isopropyl alcohol
Two 10-32 stainless steel screws 
(to remove the plunger bearing)
1. Put the seal housing removal tool into the groove on the seal housing.
2. Use a hex wrench to turn the screws on the seal housing removal tool.

Turn the screws on one side and then the other so that the tool pulls the housing straight out of the
hydraulic end cap.
102
Remove the proximity switch from the hydraulic end cap to make this procedure easier.
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HyPrecision Predictive waterjet pump Operator Manual 810120
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2
3 1-11090 Hydraulic rod seal, 1 inch
4 1-11608 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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