Hypertherm HyPrecision 15, Operator'S Manual

Page: 160 / 194

160 HyPrecision15/30/50 Operator Manual 808240
7 – Troubleshooting
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A leaking high-pressure seal in the intensifier can force water past the rod seal and into the hydraulic fluid. Hydraulic fluid
contaminated with water has a milky appearance. Contaminated hydraulic fluid can damage the hydraulic pump.
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Water can only enter the hydraulic system if the weep holes on the dynamic seal backup and the seal housing are
blocked. Make sure that the weep holes are free of debris while doing maintenance on the intensifier.
Replace the hydraulic fluid and examine all of the parts, including the inside of the hydraulic fluid tank, the hydraulic
hoses, and seals. Refer to page 94 for instructions. It could be necessary to drain and flush out other areas such as the
shift valve, hydraulic manifolds, and the hydraulic pump.
Short seal life
If the high-pressure water seals have a short life, take these actions.
 Make sure that the mating surfaces are smooth and free of debris.
 Repair or replace the high-pressure cylinder and plunger.
 Make sure that the water quality is within satisfactory ranges. Refer to the Water quality section, which begins on
page 181.
 Check for cracks at the ends of the high-pressure cylinder.
 Replace the high-pressure water seals and hoops.
 Replace the high-pressure cylinder.
If the high-pressure seal backups have a short life, make sure that the plunger bearing is not worn.
Hydraulic fluid leak from Possible cause
Dynamic seal housing weep hole
• The rod seal has failed.
• The O-ring or O-ring backup on the seal housing
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has failed.
Anywhere on the intensifier An O-ring has failed.