Re: '55 Torsion Level System Trouble Shooting

Posted by HH56 On 2018/12/25 17:32:23

It sounds as if the voltages are all there as long as the 12v measured on the solenoids was on the buss bar connected between the two large terminals as well as on the small terminals. The problem could now be electrical or mechanical. If the motor tries to move and nothing happens it is probably mechanical in the compensator box but if the motor never moves and you have voltage to the control box and solenoids then electrical past that point. Make sure brushes are making good contact with the armature and there is still a good ground to the control box via the mounting bolts. If that is good there is a possibility the contacts inside the box have oxidized and cannot bring in the relays. That seems to be something that can happen with age and even with a NOS box that has sat on the shelf for years. If nothing else is found you might drill the rivets and remove the control box cover. Clean the contacts with a point burnisher. Just be very gentle with them as the arms are somewhat delicate. The cover can be reinstalled using screws and nuts.

On a 55 the limit switches are combined in a single box mounted on the bracket with the solenoids. The transverse bars will contact a part on the switch and move it to one side or the other to activate the limit switch for the direction moving.

Here are some photos of the limit switch setup courtesy of Stewart and his 55 now under restoration. The control box was the same internally 55-56 with the difference being on the outside with how and where the terminals were mounted.

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