Folks,
List your parts for FREE here!

I thought we'd see more participation on this board. Just use a third party payment system like Paypal or similar to accept payment...

Get $$$ for your old parts, you never know!

Folks,
I'm working on modernizing the obsolete industrial forum... Stand by as I bring the forum up to speed.

Thanks for your support in the past and I'm looking forward to a productive future.

We all understand the difference between digital and analog multimeters. Why not have a little fun, tell us which type of multimeter you prefer...

A cordless drill is an excellent means of checking a tach generator. You can calculate the voltage based on the speed of the cordless drill.

You can also megger each lead to ground and check for resistance.

You can also pull the brushes and inspect them while you're at it. Also shine a flashlight in at the commutator and see what it looks like.

Other than that, I'm not sure what else you can check.

How long did the original bellows last in your timers? Decades? I have seen these things work well for years at a time. I would rebuild if the parts are still available (and I think they are...).

Let us know how you make out with the rebuilding if you go that route.

I've seen some hardened seals with these, but when there is contaminated or oily air, I don't think you're going to avoid hardened seals with any air valve. Ross valves are popular so that typically means something about the brand.

One thing is for sure, the silver colored contact tips aren't pure silver, at some level they are a silver alloy. I don't know enough to elaborate, I just know they are not pure silver.

Some of the contactor brands that I have seen using silver alloy tips are: ABB, Allen Bradley, Cutler Hammer, Furnas Innova, General Electric, Joslyn-Clark, Sylvania, Siemens, Square D, Telemecanique, Ward Leonard, and Westinghouse.

Tach generators can be tested easily. Even though the tach gen was replace in the last 6 months that doesn't necessarily mean it's good. I recommend you remove it from the motor and bench test.

Chuck it up in a cordless drill and use some alligator clips to secure a voltmeter on DC volts. See what kind of output you get.

Agree, typically crane controls would be separated according to function. Shepard Niles is definitely in that league so you should be able to isolate whether one crane motor is causing the arc, and if so, which motor has the high current.

OK, long story short... this is the temporary home of the classifieds section. We plan and expanded more function version of classifieds in the near future, but this should actually work fine for now.

Simply post your ad, whether your looking to buy, or trying to sell. All transactions are on your own, so buy and sell at your own risk.

When our new system is ready to go, we will let you know and we'll take it from there. Good Luck!

If you've been in the maintenance field for a while, you've seen some cool mechanical and electronic gadgets along the way. Many of these have been replaced by better technology.

Take a stroll down memory lane and reminisce about obsolete mechanisms and obsolete electronics. Post some pictures if you have them. They could be industrial machinery or products that have long been retired or any vintage industrial products that are still alive and kicking.

Look forward to seeing and hearing about anything vintage from industry or machinery...

Good to hear from you Alex. thanks for signing up and I also hope to see some participation at the industrial roundtable soon.

This is our attempt to launch a forum style venue for troubleshooting discussion and just about anything that relates to the field of industrial maintenance. So welcome aboard and please take a moment to introduce yourself to the community.

We hope to grow the board in a way that it becomes an asset to those who need troubleshooting advice as well as for those who enjoy sharing their experience in industrial maintenance and engineering.