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EFX 120/S19-2350
Troubleshooting: Piston Disassembly and Cleaning
To prevent injuries, use proper protective equipment
for eyes and skin when using a propane torch.
Remove the valve's top cap and pull out the
A
thermostat. You may use a needle-nose pliers
to remove the thermostat from the valve body if
desired.
Insert a 7/16" dia. rod into the valve until it touches
the top of the pushrod that is attached to the
B
piston. Mark the length of the rod inside the valve.
Push the rod until the piston stops and mark the
new length.
If the rod travels less than1/2", the piston is not
moving freely within the liner and they must be
cleaned:
1. Remove the control section assembly, top cap
and thermostat.
C
2. Unthread the liner from the cap (it is glued
together; the o-rings must be removed and heat
should be applied to melt the glue and loosen
the liner).
3. Clean the piston and liner with any cleaner
suitable for brass and stainless steel (400-grit
sandpaper may be used to polish and hone the
piston and liner).
Push the mechanism up and down several times
to make sure the piston moves smoothly and
D
consistently. If it is not consistent, repeat Procedure
C until it moves freely, or replace. Contact your
Bradley representative and ask for Piston/Liner Kit
(part number S65-422).
8
1/11/2016
Top Cap
with Pushrod
Thermostat
The second mark
7/16"
should be 1/2"
Rod
higher on the rod
than the first mark.
Bradley • 215-1818 Rev. A; ECN 14-09-024C
Installation
Piston Overheat
Chamber
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