Hypertherm DynaMAX 550P, Operator'S Manual

Page: 110 / 224

Preventive maintenance
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110 811390 Operator Manual DynaMAX 550P/560P/575P Waterjet Pump
1. Examine the seal housing and the high-pressure seal backup. Make sure that the weep holes
and the inner grooves are clean.
2. Put O-ring lubricant on the backup ring and the seal housing O-ring.
3. Put the seal housing O-ring backup and the seal housing O-ring on the seal housing. Put the
O-ring on the side nearer the narrow end of the seal housing.
4. Put the plunger bearing on the plunger. Push the plunger bearing into the hydraulic end cap.
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2
1 Weep holes
2 Grooves
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2
1 O-ring backup, -035
2 Seal housing O-ring, -035
The seal housing O-ring backup has a flat side and a concave side. Make sure the
flat side of the O-ring backup faces the wide end of the seal housing. The O-ring fits
into the concave groove on the O-ring backup.
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