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  9. Additel ADT927 Technical specifications

Additel ADT927 Technical specifications

Maintenance Instructions
(ADT927)
Preparation for maintenance or repair service.
1.Open vent valve and isolation valve,(Counterclockwise) push the
liquid out of piston cavity by turning the pre-pressurization wheel
clockwise until it is completely in.
2.Drain the liquid media out of the pump.
3.Close the isolation valve by turning clockwise until closed.
4.Close vent valve by turning clockwise until closed.
Isolation Valve
Vent Valve
Pre-pressurization
wheel
High-pressure
pressurization handle
Repairing pre-pressurization piston unit
1. Loosen the Allen screws by turning all three screws counterclockwise 5 to
8 turns.
2. Turn out the pre-pressurization wheel to about half way out.
Allen Screw
Pre-pressurization
wheel
3. Turn the feed screw nut counterclockwise and completely remove the
feed screw nut and back holder
4. Pull the pre-pressurization piston out of the chamber. (Warning: Be careful
not to damage the liquid reservoir during procedure)
feed screw nut
Liquid Reservoir
Back Holder
5. Replace the O-ring (9.12mm X 3.53mm).
6. Assemble all parts back in revise order.
Repairing high-pressure pressurization piston unit
1. Turn the high-pressure pressurization wheel counterclockwise to about
half way out.
O-ring (9.12mm X 3.53mm)
Pre-pressurization piston
2. Turn the hex nut counterclockwise until completely out.
Hex Nut
high-pressure
pressurization wheel
3. Hold the high-pressure pressurization wheel and pull the piston unit out of
piston chamber.
4. Turn the hex nut cover counterclockwise and completely remove it.
High-pressure
Pressurization
Wheel
Hex nut cover
5. Replace the O-ring. (6mm X 3mm)
6. Assemble all parts back in reverse order.
O-ring (6mm X 3mm)

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