Troubleshooting: Piston Disassembly And Cleaning - Bradley EFX 25 Manual Del Usuario

EFX 25/S19-2100

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
push rod and then the 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 and into the
B
piston overheat chamber. 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.
2. Unthread the liner from the cap (it is glued
C
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
D
and 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 S65-175).
8 12/7/2017
Top Cap
Thermostat
Pushrod
The second mark
should be 1/2"
7/16"
higher on the rod
Rod
than the first mark.
Bradley • 215-1290 Rev. R; ECN 17-09-009
Installation
Piston Overheat
Chamber