Preventive maintenance
11 2 811390 Operator Manual DynaMAX 550P/560P/575P Waterjet Pump
Install the high-pressure hoops, the high-pressure water seals, the high-pressure cylinders, and the
check valves
Parts, tools, and materials
1. Put the seal installation spacer tool on a clean, dry surface.
Do not put grease or lubricant on the check valve face or in the cylinder bore. These
components are designed for dry contact.
Repair the high-pressure cylinders and the check valves every 500 hours.
Repair the high-pressure hoops and the high-pressure water seals every 500 hours.
Replace the check valves every 2,000 hours.
Replace the high-pressure cylinders:
• every 3,000 hours
• if the cylinder is chipped or cracked
Install a new plunger bearing when replacing the high-pressure cylinder.
1 Check valve assembly
2 High-pressure hoop
3 High-pressure water seal
4 Low-pressure poppet
5 Low-pressure poppet basket
6 Spacer tube
7 High-pressure cylinder
DynaMAX premium high-pressure seal repair kit.
DynaMAX poppet repair kit
Check valve assembly
Low-pressure poppet basket
Spacer tube
High-pressure cylinder
High-pressure antiseize lubricant such as
Blue Goop or PURE Goop
Seal installation tools (Refer to 1-12084
DynaMAX 5-series standard Tool kit).
Rubber mallet
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