Re: Overdrive wiring issue
Posted by Jim Kavanagh On 2019/4/17 12:18:11
Following up on the solenoid I installed and which failed almost immediately. It was a rebuilt sold by a Packard shop.
When I pulled the cap off the solenoid, the plunger shaft had extended all the way to the top of the cap, and the force of the plunger action had actually moved the two point contacts to either side of the shaft. It was still extended when I pulled it apart. The shaft can be moved (under pressure) beyond what should be its resting position. I am not sure what should prevent this, other than the operation of the solenoid. Is there an actual hard stop?
This resulted in bending the arms that hold the points to an extent that they no longer both break when the shaft moves inward and also close the small points that I think turn off the dash light.
This solenoid worked only two or three times when I installed it, and that was it. I assume at that point, the shaft shorted by contact to the cap, you can see the burn marks in the cap in one of the pictures.
I am not sure, but I think the shaft is just a bit shorter than in my other solenoid, because I can install my other solenoid without energizing it after I pull out the pawl, but this one I must energize. Unfortunately, I did not measure the length on my other solenoid before I re-installed it.
Is this just a bad rebuild, or is there possibly something else going on?
Attach file:
(243.66 KB)
(148.83 KB)
(119.52 KB)
(210.17 KB)
When I pulled the cap off the solenoid, the plunger shaft had extended all the way to the top of the cap, and the force of the plunger action had actually moved the two point contacts to either side of the shaft. It was still extended when I pulled it apart. The shaft can be moved (under pressure) beyond what should be its resting position. I am not sure what should prevent this, other than the operation of the solenoid. Is there an actual hard stop?
This resulted in bending the arms that hold the points to an extent that they no longer both break when the shaft moves inward and also close the small points that I think turn off the dash light.
This solenoid worked only two or three times when I installed it, and that was it. I assume at that point, the shaft shorted by contact to the cap, you can see the burn marks in the cap in one of the pictures.
I am not sure, but I think the shaft is just a bit shorter than in my other solenoid, because I can install my other solenoid without energizing it after I pull out the pawl, but this one I must energize. Unfortunately, I did not measure the length on my other solenoid before I re-installed it.
Is this just a bad rebuild, or is there possibly something else going on?
Attach file:
(243.66 KB)
(148.83 KB)
(119.52 KB)
(210.17 KB)
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