EFD 782RA MAINTENANCE GUIDE

782RA Spray Valve

MAINTENANCE & PARTS GUIDE

IMPORTANT!

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Maintenance or

Tool Crib

Supervisors

Electronic pdf files of EFD®manuals are also available at
www.efd-inc.com/manuals.html.

For EFD sales and service in over 30 countries,
contact EFD or go to www.efd-inc.com/contact

EFD, Inc.

East Providence, RI USA
800-556-3484; [phone] (outside the USA)
[e-mail] www.efd-inc.com

EFD International Inc.

Dunstable, Bedfordshire, UK
0800 585733 or [phone]
Ireland 00800 8272 9444
[e-mail] www.efd-inc.com

EFD, Inc., Asia

China: [phone]
[e-mail] www.efd-inc.com/cn
Singapore: [phone] [e-mail]

®

A NORDSON COMPANY

42

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 noz­zle 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 [e-mail] USA 800-556-3484 Europe [phone] Asia [phone]

Sales and service of EFD dispensing systems are available worldwide.

Bearing seal #7852

Screw #H2-56X1/4PH

Nut #7842A

Rotor

Gear cover
#7864

bearing,
small
#7844A

Rotor
#7842-3

Rotor
bearing,
large
#7844B

Spur gear #7845

Nozzle #7841

Spur gear
retainer
#7847

Pinion gear
#7862

Motor mount / gear shroud
#7863

Screw
#H2-56X1/4FH

Nozzle
extension
#7841-3