Maintenance Tools
6" adjustable wrench
snap ring pliers
packing extraction tool #7803
Caution: Always release the reser-
voir pressure and disconnect the
power before performing any mainte-
nance on the system. On all EFD
tanks, there is a pressure relief valve
that should be activated before open-
ing the tank to ensure that all pres-
sure is bled off.
Valve Maintenance
Normal cleaning is accomplished by purging with
appropriate solvent. The air cap and nozzle can be
removed, soaked in solvent and reinstalled without
demounting the valve. (Refer to Exploded View on page
17.)
To thoroughly clean valve chamber and replace needle
packings:
1. Remove the needle stroke control knob and spring
to prevent damage to the needle and nozzle during
reassembly.
2. Remove the air cap retainer, then the air cap, nozzle
and fittings from the liquid chamber.
3. Remove the fluid chamber from the air cylinder
body by turning counterclockwise until free. Then
remove the O-ring from the fluid chamber.
4. Clean the fluid chamber, air cap and nozzle in
appropriate solvent.
5. Remove the needle packings from the fluid cham-
ber, using tool #7803 supplied with the valve. Insert
through nozzle end of the fluid chamber and gently
push out the packings (see Figure 1).
Do not use sharp instruments to scrape or clean
these components. Scratches may cause the valve
to leak.
6. Remove any remaining packings and the spring
14 / Valve Maintenance
Figure 1
Pushing needle packings
from the fluid chamber.
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