STATIM Solenoid Exhaust Valve maintenance

Several STATIM cycle faults can result from a solenoid exhaust valve that is stuck open or closed, so annual maintenance is key.

There are two simple methods for removing the plunger tube without the special solenoid plunger wrench if you do not have one.

First very easy method:

You can use two nuts 🔩 tightened on the plunger, and then loosen the plunger with a wrench on the bottom nut. The top nut works to keep the bottom nut in place as a jam nut.

Remove the nut then the yoke and coil from the solenoid plunger valve.
Then screw on two nuts on the plunger tube. (should be 11/16 OD – 3/8 ID at 2/64 thread)

Tighten the top nut, then loosen the plunger tube with the wrench on the bottom nut turning the opposite direction.

Solenoid plunger valve two nuts on a plunger tube instead of a spanner

Alternatively, you can use two wrenches:

Tightening the top nut until with one wrench until you can loosen the plunger by turning the yoke of the valve the opposite direction.

See my below video for how to open the plunger tube in under 30 seconds for STATIM solenoid exhaust valve maintenance.

How to open the plunger tube in under 30 seconds with two wrenches.
Solenoid exhaust valve parts
Old solenoid plunger, spring, bronze disk and flange seal will patina with time and need to be cleaned or replaced annually.

Plungers can be cleaned, but work better when replaced.

New plunger kit on left. Note the difference.
Open and ready: clean the plunger tube before replacing the plunger kit.

Found an obstruction?

Small wires or particles could stick in the valve, preventing it from closing or opening.
Cleaned and ready for a new plunger repair kit.

Get a new Solenoid plunger repair kit

Is the coil weak or not functional? Replace it.

The entire valve assembly is available as well

Just in case, here is the solenoid plunger wrench

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