Maintenance Manual
09/16 Model 6518.2FR Page 5 of 9
TROUBLESHOOTING
PROBLEM
REPAIR CHECKLIST
5.
Continuous bubbler flow.
5.
a.
Insure that push button is not obstructed
and springs back to normal position.
b.
Remove four screws, which secure
plastic diaphragm block to brass valve
body. Pull plastic and rubber diaphragm
assembly out of valve body. Locate tiny
hole in rubber diaphragm just under lip
of plastic part. Clean debris from this
hole. Inspect valve seat for grooves. If
seat is worn, replace with stainless steel
seat (newer models) or replace valve
(older models, integral brass seat).
c.
If valve seat was OK and diaphragm
holes were free from debris, inspect
rubber button located at center of
floating steel disc in valve diaphragm
block assembly. If button is worn, turn
disc over or replace disc.
d.
If diaphragm and seats are in good
condition, stretch spring slightly. Spring
is located behind floating stainless steel
plate.
e.
Insure that air bleed port on valve
plastic block assembly is not plugged.
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