Maintenance Manual

09/16 Model 6518.2FR Page 4 of 9
TROUBLESHOOTING
PROBLEM
REPAIR CHECKLIST
1.
Bubbler Flow Control.
1.
Adjust pressure regulator:
a.
Loosen the locknut.
b.
Rotate the knob clockwise to increase
flow or counterclockwise to reduce flow.
c.
Tighten the locknut.
d.
Lower the valve assembly back into the
casing.
e.
Repeat the above steps until the
bubbler flow is correct.
f.
Replace pressure regulator if
necessary.
2.
Insufficient bubbler flow.
2.
a.
Check that the main shut-off valve is
wide open.
b.
Verify minimum 30 psi supply pressure.
c.
Clean inlet strainer screen located in the
valve body.
d.
Adjust Pressure Regulator (Refer to
Step 1).
3.
No flow.
3.
a.
Check for leaks in the air tubing going
from the push button to the valve.
b.
Make sure the air tubing compression
nuts are hand tight.
c.
Disconnect air tube from push button
assembly. Blow into tube to verify valve
function. Replace valve if necessary.
d.
Disconnect air tube from push button.
Place finger over air outlet. Push button
to test diaphragm. Tighten diaphragm
cap screws. Replace diaphragm if
necessary.
4.
Continued insufficient or varied height
of bubbler flow.
4.
a.
Check for kinks in the tubing.
b.
Adjust Pressure Regulator (Refer to
Step 1).