HyPrecision Predictive waterjet pump Operator Manual 810120 125
5 – Preventive maintenance
Preventive maintenance
5. Put the needle through the needle guide and the valve seal. Make sure that the point of the needle faces the
seal.
6. Put high-vacuum grease on the red O-ring on the valve seal. Make sure that the red O-ring on the valve seal
faces away from the needle.
7. Put the needle-and-seal assembly into the valve body until the needle guide is even with the top of the bore.
8. Install the actuator on the valve body. Tighten the actuator by hand.
Install the bleed-down valve
Parts, tools, and materials
1. Tighten the gland nut on the high-pressure collar at the high-pressure fitting of the valve.
Refer to Special fittings on page 189 for torque values.
2. Connect the water drain tube to the bleed-down valve.
3. Connect the compressed air hose to the fitting on top of the actuator.
4. Turn on the water to the pump.
5. Monitor for leaks.
5/8-inch open-ended wrench
3/4-inch open-ended wrench
13/16-inch open-ended wrench
1-inch open-ended wrench
Torque wrench
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