Preventive maintenance
122 811390 Operator Manual DynaMAX 550P/560P/575P Waterjet Pump
7. Use 13/16-inch open-ended wrench to loosen the high-pressure fittings attached to the
bleed-down valve body.
8. Remove the bleed-down valve assembly from the pump.
9. Remove the outlet adapter from the valve body.
Assemble the bleed-down valve
1. Put high-pressure antiseize lubricant on the seal.
2. Put the flow reducer into the outlet adapter.
3. Put the seat into the outlet adapter.
4. Install the outlet adapter in the bleed-down valve body. Torque the adapter to 95 N∙m (70 lbf∙ft).
Refer to Steel JIC 37° on page 183
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
1. Tighten the gland nut on the high-pressure collar at the high-pressure fitting of the valve.
Refer to Fittings on page 182 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.
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