110 HyPrecision Predictive waterjet pump Operator Manual 810120
5 – Preventive maintenance
Preventive maintenance
Install the seal housing assembly and the plunger bearing
Parts, tools, and materials
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.
Replace the plunger bearings:
• every 3,000 hours
• when replacing the high-pressure cylinder
Replace the seal housing assemblies every 6,000 hours.
CAUTION
Water can enter the hydraulic system if the weep holes in the dynamic seal backup or the seal
housing are blocked. Make sure that there is no debris in the weep holes.
1
1-11610 High-pressure seal backup (bronze)
2
1-11609 Seal housing
3
1-11090 Hydraulic rod seal, 1 inch
4
1-11608 Plunger bearing
1-17437 HyPrecision premium high-pressure seal
repair kit
1-11608 Plunger bearing
1-11609 Seal housing
1-13969 Petroleum-based O-ring
lubricant, 56 g (2 oz.)
Antiwear (AW) mineral oil or synthetic hydraulic
fluid, ISO viscosity grade (VG) 32 or 46