Need Help with a Postwar Culvert Unloader magnet not lowering

I've had one since I was a boy. The solution was to wrap a piece of lead solder around the base of the magnet assembly, just enough weight to pull down the string.  I think that piece of solder is still on it, and I got it in 1968. No glue required

Jim Waterman

bbsfdl60 posted:

Hello all I have a Lionel Postwar version of the culvert unloader. I had to restring it and replace the missing counterweight. the magnet travels on the beam but the magnet will not lower when it gets above the track. Has anyone had experience with restringing these?  and advice is appreciated.

Here are few ideas. Others may have more:

1. You have to have just the right amount of string between the conveyor assembly and the counterweight. The postwar service manual specifies exactly 11.5 inches for the string on the counterweight side, and exactly 43.5 inches for the main part of the string on the motor side. As the counterweight reaches the ground, that's when the magnetic hoist begins to lower.

2. If you have the right lengths of string set up, then another reason might be a worn out magnetic hoist (part No. 345-65). If it's worn out, the string can get caught up in it. You said you just replaced it. If it's a new reproduction, sometimes the two halves need to be pulled apart slightly to that the string can pass through without getting snagged.

3. If everything else is good, then you may not have just the right amount of weight on the hoist for lowering. Try attaching a few metal washers on each side of the metal weight inside the hoist. Try different washer sizes until you get just the right balance. Too little, it won't lower. Too much, and it won't raise back up before it travels back to the ramp with a culvert.

Don't get frustrated and give up. This accessory is a pain in the ***, but once adjusted properly, it's really cool to watch. And it looks way better than the modern era version with that big motor hanging off the side of the conveyor.