Andy Morris used his keyboard to write :
Hi, I just wondered if anyone knows the answer to this one?

I have a 4043H1056 valve that does not automatically shut when power is
removed.
The spring return seems to have failed. - Does this require a whole new
valve unit, or can just the actuator be replaced?
I mean is the spring part of the valve, or part of the drop on actuator
block?

The head (actuator) can be replaced by itself, this is a fairly common
failure. The actuator will be fixed on the valve by a couple of screws
and from past experience, it is likely that removing it from the valve
will allow it to spring return to its proper location.

It should be possible to turn the valve spindle fairly easily with just
your fingers, as a check that the valve is not the cause of the
problem.

--


--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org