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Page 13
To Clean The Strainer
Air Release Valve
Troubles
To Inspect Air Release
Unit
2. The flat face against which the “O” ring seats must be clean and free of nicks or dents which
will allow the pressure to leak between the gasket and the metal.
To Clean The Strainer
Remove the strainer cover and pull out the screen. Blow the dirt off screen with compressed air
and rinse in gasoline or kerosene.
FIGURE 15
AIR RELEASE COMPONENTS
Air Release Valve Troubles
Troubles with this unit may arise from:
a) Collapsed ball float allowing vent to remain open.
b) Dirty or worn valve seat.
c) Improper position of float.
d) Sticking back pressure valve.
To Inspect Air Release Unit
1. Remove the Strainer (see Fig. 15).
2. Uncouple the Vent Connection.
3. Remove the cap screws on the air release cover and lift out the mechanism.
4. If the float is damaged, remove by taking out the hinge pins and replace with a new one.
5. If the valve is leaky,
a. Remove the air release unit from the underside of the cover by unscrewing three small
screws.
b. Take off the sleeve with piston seal.
c. Move the ball in the direction of the valve housing as far as possible and remove valve
disc assembly.
d. Inspect piston seal for any obvious deterioration.
e. The valve disc assembly should be taken apart to inspect for dirt or defective pilot valve
seat. A pair of fine nose pliers is needed for this. Replace valve if seats are defective.
f. When reassembling, make sure the piston seal is properly positioned and that the valve
disc assembly moves freely in sleeve.
6. To avoid possible mechanical interference, the support bracket and float linkage should ap-
pear as shown above. If this is not as shown, the framework has been bent out of shape. To
adjust, bend metals back in the direction required.