SOR Weatherproof Pressure Switch - Manual (Page 2)

2/4 Form 557 (05.13) ©SOR Inc.
None of the metal parts (nor the micro switch) can be replaced, nor can the body be
loosened without affecting the factory-adjusted overtravel. Diaphragms and o-rings can
usually be replaced without affecting factory adjusted overtravel.

Relieve range spring pressure by unscrewing the adjusting nut all the way toward the
switching element (micro switch). Failure to relieve range spring pressure before
disassembly may also damage internal parts.

Remove the pressure port.
Threaded pressure ports should be removed by placing the housing in a vise and
applying a 1-1/8” wrench to the pressure port.
Bolted pressure ports should be removed by placing the housing in a vise and
removing the bolts.

Remove all internal parts from the sensing assembly and discard the diaphragms and
o-rings. It is not necessary to disassemble the piston assembly.

Thoroughly clean all metal parts in a quick-drying solvent that leaves no residue. Blow
completely dry with clean, dry air or gas.

Place the piston assembly back into the body making certain that stepped portion of
anti-friction washer engages the spring(s).

Install new o-rings and diaphragms with the body face up. Follow these instructions:
a. Place the back-up diaphragm against the piston. Depending on the piston size and
the diaphragm option, the back-up diaphragm may be one or more diaphragms of
transparent
material.
b. Install the metal back-up ring on the back-up diaphragm. Center the grey secondary
diaphragm inside the ring. (Note: N6, R1, S1, S2 and Y1 diaphragm systems will not
have these parts.)
c. Lay the primary diaphragm over the back-up diaphragms. The primary diaphragm
may be black, transparent or metallic, depending on the diaphragm option.
d. Place the o-ring over the primary diaphragm.

Reassemble the pressure port.
For threaded pressure ports, spread a drop of lightweight lubricant on the face of the
pressure port that seats against the o-ring. Tighten the port to the body with 70 – 80 ft/
lbs of torque.
Carefully read these instructions BEFORE attempting to replace diaphragms.
If this procedure is not followed or the same type diaphragm and o-ring is
not installed, the warranty is null and void.
Failure to relieve range spring pressure may cause personal injury to the
diassembler.