Needle
stroke
control
#780SR-KIT
Thrust
washer
#7809
Thrust
washer
#7809
Piston
return
spring
#7802
O-ring #7519
Piston and needle
assembly #7805-SS-3
Air inlet fitting #78518M
O-ring
#7806
Air motor
assembly
#7860
Air inlet fitting #78518M
Fluid body #7875
Fluid inlet fitting #7543BP
O-ring
#7517
Needle packing assembly #7810
Retaining washer #7807
Air cylinder body #7811
Snap ring
#7526
Packing spring #7808
1
5
7
10
11
13
14
15
17
16
10. Lubricate the needle with Nye
Lubricant #865. Reinstall the
needle packing spring and a new
packing kit.
11. Install a new O-ring (#7517) on the
fluid body.
12. Reassemble valve in reverse order.
Replacing piston and needle
assembly or piston O-ring:
13. Remove needle stroke-control
knob.
14. Remove piston return spring and
thrust washers.
15. Remove the snap ring.
16. With small pliers on the spring
pilot, pull the piston and needle
assembly out of air cylinder. The
piston and needle assembly is one
unit and cannot be disassembled.
17. Clean air cylinder body wall and
lubricate with Nye Lubricant #865.
18. Reassemble the valve in reverse
order.
General Maintenance Kit
#780S-RK
Includes O-rings, needle-packing
assembly and lubricant.
Maintenance Tools:
6” adjustable wrench
5/16” open-end wrench
snap-ring pliers
packing extraction tool #7803
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.
