background image

Motor mount / gear shroud 
#7863

Pinion gear
#7862

Nozzle
extension
#7841-3

Nozzle #7841

Spur gear
retainer
#7847

Rotor
bearing,
large  
#7844B

Rotor
#7842-3

Rotor  
bearing,
small  
#7844A 

Gear cover
#7864

Screw #H2-56X1/4PH

Nut #7842A

Bearing seal #7852

Spur gear #7845

Screw
#H2-56X1/4FH

4

2

3

Valve maintenance

To thoroughly clean the fluid body and
replace needle packings:

1. Remove needle stroke control knob

and spring.

2. Remove the gear cover.

3. Remove the rotor retainer nut, then

the rotor, nozzle, fittings and motor
from the fluid body.

4. Remove the motor mount and

motor assembly.

5. Remove the fluid body from the air

cylinder body. Remove the O-ring
from the fluid body.

6. Clean the fluid body, rotor and noz-

zle in appropriate solvent.

Note:

Rotor bearings can be soaked in

light oil for one hour to penetrate past
the seals. Replace bearings if rotor does
not rotate smoothly.

7. Use tool #7803 to remove needle

packings from fluid body.

8. Remove any remaining packings

and the spring from the needle.

Note:

The lower cylinder needle O-ring

is held in place by a flat retaining washer
that also serves as the packing-spring
seat. The washer may come out with
the spring. Ensure that it is back in place
before reinstalling the packing spring.

9. Clean the needle with a cloth

dampened in solvent.

Valve Disassembly 
and Reassembly Procedures

www.efd-inc.com   [email protected]

USA 800-556-3484   44 (0) 1582 666334   Asia +86 (21) 5854 2345 

Sales and service of EFD dispensing systems are available worldwide.

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