I have worked on many a Montgomery Hydro, and I d not think this is a Mongomery.

Maybe the tank and valve are Montgomery, what do they look like?

In 1969 Montgomery was using Potter Brumfield relays on their hydro's. The terminal block markings do seem like Montgomery though. Very odd.

Ya, the terminals and relay names are pretty similar to Montgomery but I'm stumped on it... I hope someone out there know what it is.

So, I have seen tanks like this in confined type spaces. You do have a Montgomery there. Have you tried Spares with the job number? I have looked and have nothing similar at all.

I have not, you think that serial number off the cross head data tag would work? I did end up finding 3 prints that are similar. They have a K relay for doors closed anyway, the terminals are all C3, C4, etc but maybe if I ignore the C. My problem is simple, there are no relays picked in the controller except the alarm bell relay when you push a hall button so probably safe, door locks, or gate. This may be enough to go back with but I’d feel a lot better with a print that matched. I thought maybe Montgomery had put their name on another manufacturer’s controller that someone might recognize. I’ve seen US IBM relay controllers that Montgomery painted dark grey and put their name on.

The crosshead number should work as a job number.

Montgomery almost always had a C before their job numbers, but this could have been an earlier controller. These relays look like old Haughton Hydro relays. I must say you always come up with interesting problems.

Here are the prints I found

The numbers aren't close. I only count 29 field wires. You are going to have to get into the junction box in the hoistway and hand-wire this puppy.

Dirt send an email to [email protected] I have 1968 and 1970 prints