Hypertherm HyPrecision 15, Operator'S Manual

Page: 109 / 194

HyPrecision15/30/50 Operator Manual 808240 109
5 – Preventive maintenance
Preventive maintenance
1. Slide 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.
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Alternate sides so that the tool pulls the housing straight out of the high-pressure end cap.
3. Pull the seal housing and the high-pressure seal backup off the plunger.
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If the rod seal does not come out of the end cap with the seal housing, use a dental pick or other strong, narrow
tool to pry it out.
4. Remove the high-pressure seal backup from the seal housing.
5. Examine the high-pressure seal backup for damage. Make sure that it fits tightly on the plunger.
6. If this preventive maintenance interval includes replacing the high-pressure seal backup and the O-ring, remove
these parts from the seal housing.
7. Install 2 socket-head cap screws in the threaded holes in the plunger bearing. Use the screws to pull the plunger
bearing out of the end cap.
8. Remove the plunger bearing from the plunger.
9. Clean each part with a lint-free towel and isopropyl alcohol.
10. Examine all parts for deterioration, corrosion, or damage.
11. Clean and examine parts that will be replaced to identify wear patterns or damage that can signify other problems.
Do not use soap, detergent, or solvents.