Hi everyone. First i would like to thank you for reading my post and
answering my question. I have a lionel 6466W tender and it works a
little too well. It runs really strong, so strong in fact it doesn't
shut off. I am very mechanical but before I start tearing it apart I
wanted to find out what might be the problem. I wonder if its actuated
by an electromagnetic means or what. Any ideas on a strait forward
This is not an uncommon problem. There is a special relay inside that responds only to the DC voltage that the transformer's whistle controller superimposes on the usual AC voltage. Its pole piece can get magnetized a little, causing the relay armature to stick to it after it operates. A very easy fix is to put a little piece of masking tape between the pole piece and the armature, to create the tiniest gap between them.
See there Stangboy,
I told you over in Classic Trains to come here, and that Bob would know the answer. He is our own resident Expert on all things electrical. He has solved more problems here than I care to think about.
Hey Bob, just a thought,
Sherriff Joe / Bob Nelson 2012!!!!
Two of the Greastest Problem solvers that I can think of, probably do this country more Good than it would be ready for.
May your flanges always stay BETWEEN the rails
Yeah Doug you were right. He is a quick responder too.
Bob, thank you for your prompt and informative response. My other question would have to be where do I find the pole peice and armature? Do I have to do any further dissasemble or is simply removing the initial plastic body enough? I wish there was an online schematic of the tender so I could see what parts are where. Any help you can give exactly where to put the masking tape would be most appreciative. Thanks!
You can see the whistle relay easily with the tender's shell removed. In the link below it is part number WSR-1. The "armature" is the thin piece at the lower left of the picture. There are two electrical contacts facing eacj other (one above the other) one above the other. They stick out beyond the body of the relay. Blow the whistle and watch the contacts move. The lower one will be pulled up until it touches the upper one. When you stop pressing the whistle control button, the armature should drop back. Yours is balky.
Sometimes there is a thin layer of grease or oil that has accumulated on the fixed or moving pieces. Try genly cleaning cleaning them with a piece of thin cardstock soaked with a little mineral spirits. Be sure it evaporates before trying thw whistle again. Sometimes that will fix it.
The main body of the relay is an electromagnet. As lionelsoni says it sometimes retains a little residual magnetism. Slip a small piece ot ordinary tape in so that it keeps the armature separated from the bottom of the magnet by just a hair.
You may need to use a pair of tweezers to get the tape into place. Use a tiny (1/4" square) dot of tape. It should end up positioned with the adhesive side UP adhered to the shiny stationary piece in the center of the relay. Don't let the tape interfere with the movement of the armature. Don't get any adhesive from the tape on the moving part. (You don't want to make things worse by adding some adhesive gunk that would tend to make the armature literally stick to the bottom of the magnet.) Don't bend any parts.Don't put the shell back on until the relay is working smoothly and reliably. Sometimes a second layer of tape is necessary, but not usually.
If all else fails, you may have to consider buying a new relay of the same electricro-mechanical type, or substituting an electronic version.
You may clean the electrical contacts very gently. This is part of regular maintenance and is not related to your specific problem. Do not get any tape or adhesive gunk on the electrical contacts themselves.
Check out this link.
Let us know whether it works. Good luck.