Hypertherm HyPrecision 15, Operator'S Manual

Page: 80 / 194

80 HyPrecision15/30/50 Operator Manual 808240
5 – Preventive maintenance
Preventive maintenance
Repair the check valves
Repair the low-pressure poppets
Replace the low-pressure poppets after every 1,000 hours of operation.
Replace the check valve after every 2,000 hours of operation.
This procedure is for a moderately worn check valve. Severe wear requires replacement.
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To reduce downtime, Hypertherm recommends doing preventive maintenance on both ends of the intensifier at the
same time.
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Refer to the Parts lists section, which begins on page 147, for part numbers and ordering information.
Required tools, materials, and parts
12-micron lapping paper (included in the HyPrecision standard tool kit)
15-micron lapping paper (included in the HyPrecision standard tool kit)
Granite surface plate (included in the HyPrecision standard tool kit)
Clean, lint-free towel
Isopropyl alcohol
Masking tape
1. Disassemble the intensifier to access the parts. Refer to page 104 for instructions.
2. Tape a sheet of lapping paper on a granite surface block. Make sure that the paper is smooth and flat.
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For best results, start with the 12-micron lapping paper and finish with the 15-micron lapping paper.
Repair or replace parts identified in the preventive maintenance schedule or if the parts show signs of
deterioration, corrosion, or damage.
Put the parts on a clean, dry, oil-free surface.
1 2
1 Check valve 2 Low-pressure poppet