Mechanical timer not toggling power on and off

CarlosHRNYC

Hi guys,

I have a Torx 7200 and, while the main wheel turn and the switch "clicks" each time the pins hit, the power doesn't toggle on or off. Is this an easy (cheap) fix or do I need to buy a new timer? By the way, it is controls my pool pump.

Thanks

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Code05

It looks like both on and off pins are right next to each other. There should be a timed separation.

Push the the on switch down and see if you have power.

If yes, the pins need reset, they can become loose.

Code05

Is the ground wire missing?

CarlosHRNYC

Hi Code,

They actually were set apart. I took the photo after I had loosened them up and shut the breaker.

I would manually push the on and off switches and the pump would still run. Maybe a connection is stuck together or something wrong with the wiring?

zappa

My guess is that the switch contacts are stuck together due to arcing or normal wear. How long has this timer been running the motor? Is the timer hp rating large enough to run this motor?

CarlosHRNYC

The timer seems to be in good condition. I pulled the mechanical out of the box and took a few more pics of the back connections. The first is while engaged in "on" position. The second is "off". I also threw in the diagram on back of the door.

It's raining today so I don't think I'll be testing the circuit today. Maybe this weekend.

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a7ecorsair

I don't see the black wire that enters at the lower right connected to the timer.

joed

Tell us what wires are what in there. I see blue and red and two whites connected together. Blue should be power and red should pump.

It's hard to tell from the pics but it looks like the points might not be opening in the off position.

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a7ecorsair

Some additional info.
After looking at the pictures and diagrams, this timer must be in a switch loop. As pointed out, maybe the contact is going bad. BUT there are contacts for two loads. You could move the blue wire over one to the right and the red wire one to the right.

CarlosHRNYC

The black wire comes from the main going into the sub panel next to the timer. One breaker goes to the pool lights, and the other to the timer then to pool pump.

In the timer: The blue and white wires go from pump breaker to timer.

The red goes from timer to pool pump.

From the sub panel: the red (from the timer) , white and green (from the breaker) go to pump.

Code05

Is the timer stuck in the on or off position?

Code05

The motor run off the blues current position, but you could jumper over if those contacts work.

CarlosHRNYC

A7corsair: I think you may have something there.

The way the wiring is set up, when I toggle on and off, the connection above the blue stays put. It's the one over that connects and disconnects when I toggle. This may be the problem. I'll check it out over the weekend. Thanks for pointing that out!

joed

If too large a load was put on the timer the contacts could be welded together.
You must have a power wire on the first terminal and a neutral in the center for the timer motor run.

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a7ecorsair

When cars had points in the distributor, we used to use a point file once in awhile to clean them up. You may have carboned-up points or some pitting so cleaning up the points may fix this. It is best to use a file but some use emery cloth which can leave particles on the points preventing them from closing. Alcohol and a strip from a manila folder will work well for cleaning up after filing.
If you try the other contacts, you will need a jumper as mentioned.