Hypertherm HyPrecision Predictive P-15 Operator's Manual page 101

5 – Preventive maintenance
Remove the high-pressure cylinder assembly and the check valve assemblies
Replace the check valves every 2,000 hours.
Replace the high-pressure cylinder assemblies:
• every 3,000 hours
• if the cylinder is chipped or cracked
1 2 3
1 1-11523 Check valve assembly
2 1-11018 High-pressure hoop
3 1-11024 High-pressure water seal
1-14792 Low-pressure poppet 
4
(for HyPrecision P-15/P-30/P-50 pumps)
or
1-11526 Low-pressure poppet 
(for HyPrecision P-15/P-30/P-50 pumps)
Parts, tools, and materials
Clean towels
Isopropyl alcohol
Seal installation tools (refer to page 72)
Rubber mallet
1. Remove the high-pressure cylinder and the check valve from the plunger.
2. Remove the check valve by rolling the cylinder and tapping the check valve with a rubber mallet. Tap at an
angle away from the cylinder.
3. Tilt the cylinder so that the low-pressure poppet comes out.
4. Put the cylinder on the seal-locating ring.
5. Put the stepped end of the push tool against the seal and tap on the end of the push tool with a rubber mallet
to push the bottom seal and the hoop out of the high-pressure cylinder.
6. Turn the cylinder over and put it on the locating ring.
Prevent the spacer tube from sliding out when the cylinder is turned over.
7. 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.
HyPrecision Predictive waterjet pump Operator Manual 810120
6
4 5
7
5 1-11520 Low-pressure poppet basket
6 1-11521 Spacer tube
7 1-11522 High-pressure cylinder
3 2
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