User Guide

Service
Normal cleaning is accomplished by purging with a solvent appropriate
for the material being dispensed. .
To thoroughly clean valve chamber and replace needle packings:
1. Remove the fluid inlet fitting and tip adapter/needle seat assembly
from the fluid chamber.
2. Remove the fluid chamber from the cylinder body by turning
counterclockwise until free. Then remove the O-ring from the fluid
chamber.
3. Remove the needle packings from the fluid chamber, using tool
#7803 supplied with the valve. Insert through outlet end of fluid
chamber and push out the packings. See Figure 1 .
4. Remove any remaining packings and the packing spring from the
needle.
5. Clean the needle with a cloth dampened with solvent.
6. Lubricate the needle with Nye Lubricants #865 grease and reinstall
the needle packing spring and a new packing kit. See Figure 2.
7. Install a new O-ring (#7517) on the fluid chamber. Screw the
cylinder onto the fluid chamber. Hand tighten only. The chamber
can be turned back out up to 1/2 turn to orient the fluid inlet
fitting to the desired position.
8. Reinstall the tip adapter/seat assembly.
Piston and needle
assembly #7805-SS
Fluid inlet fitting
#7543BP
Cylinder cap
#7529
Nylon thrust
washer #7809
Piston return spring
#7413
Nylon thrust washer
#7809
Snap ring #7526
Bail hanger
#7412
Cylinder and lever
assembly #7410A
O-ring #7517
Needle packing
assembly #7810
O-ring #7806
O-ring #5148RV
Retaining washer #7807
Packing spring #7808
Tip adapter /
seat assembly
#7404
Fluid chamber
#7402
To replace the piston and needle assembly:
1. Remove the cylinder cap by turning counterclockwise until free.
2. Remove the piston return spring, thrust washers and snap ring.
3. Pull the piston and needle assembly out of the air cylinder, using
small pliers on the spring pilot at the top of the piston.
4. Clean the cylinder body wall and lubricate with Nye Lubricants
#865 grease.
5. Lubricate the needle with Nye Lubricants #865 grease, then
reinstall in the cylinder.
6. Reinstall the snap ring.
7. Reinstall thrust washers, spring and cylinder cap.
See Figure 3.
Maintenance Tools:
packing extraction tool (part #7803)
snap ring pliers (customer supplied)
small pliers (customer supplied)
6” adjustable wrench (customer supplied)
Figure 1
Needle packing
assembly
Packing seat
Stainless steel
packing expander
O-ring
Retaining washer
Spring
Cylinder body
Piston and needle
assembly
Cylinder cap
Nylon
thrust washer
Piston return
spring
Nylon
thrust washer
Snap ring
Spring pilot
Packing
extraction tool
#7803
Fluid chamber
O-ring
Needle packings
Figure 3
Figure 2
CAUTION: Check the reservoir pressure gauge prior to performing
any maintenance to assure that pressure is zero (0). To confirm this
on EFD tanks: slide the shutoff valve on the air hose away from the
tank, and open the pressure relief valve on the tank.
For assistance, please call 800-556-3484.