Help Identifying this truck

I acquired eight of these electrocoupler Lionel trucks recently, and only two of them work, and they work just barely. They appear to have a bad design where the plunger won't go in far enough to release the knuckle. Clearly Lionel and mad ein China - can anyone ID this truck?

They also have a mystery silver wheel mounted on the splined axle - what is this for? Looks like some sort of flywheel...

Original Post
romiller49 posted:

Try raising the voltage. The silver wheel is most likely the magnetic sensor used for activating early railsounds rev up.

Rod Miller

20 volts wouldn't do it. But I did find that the solenoid, spring & plunger was just a bad match - the coil doesn't pull the plunger away from the knuckle quiiiiite far enough to rekease it. After playing with it a while, I clipped the spring, about 1/3 of a turn at a time - tried it, and if it didn't work, I pulled it out and clipped another 1/3 turn. It took somewhere around 1.5 to 2 turns clipped the spring so that the plunger was pulled back far enough to release the knuckle. Works like a charm now - just finished modifying the third one and they all work great!

You are right, the little flywheel doohickey is a magnet. Totally unclear to me how that could trigger a pulsed signal to send to a sound board????

Any idea on where this truck was used and/or what it's part number might be?

BobbyD posted:

Can't tell in the images, do they have rub mark on the axles where someone has removed the metal roller pick-up attachment?

Previous owner told me they were all new, just had a LOT of defective ones, so no rub marks and no roller pickup attachments. They appear to be factory fresh with absolutely no signs of running on tracks.

610-9845-160.

The truck frame was made to accept a roller pick-up assembly, grounding strap and hall-effect sensor for the magnet on the splined axle.

It was used on the TMCC Aquarium Cars (6-19845 Whale and 6-19868 Shark) and Animal Cars (6-19846 Giraffe and 6-19850 Lion).

TRW

GeoPeg posted:
BobbyD posted:

Can't tell in the images, do they have rub mark on the axles where someone has removed the metal roller pick-up attachment?

Previous owner told me they were all new, just had a LOT of defective ones, so no rub marks and no roller pickup attachments. They appear to be factory fresh with absolutely no signs of running on tracks.

Was the "previous owner" Lionel? Can't believe they would knowingly allow defective parts out the door.

BobbyD posted:
GeoPeg posted:
BobbyD posted:

Can't tell in the images, do they have rub mark on the axles where someone has removed the metal roller pick-up attachment?

Previous owner told me they were all new, just had a LOT of defective ones, so no rub marks and no roller pickup attachments. They appear to be factory fresh with absolutely no signs of running on tracks.

Was the "previous owner" Lionel? Can't believe they would knowingly allow defective parts out the door.

Yep! Having repaired 5 of them now, I would say the root cause was a vendor who supplied improper springs. Some springs would require remotal of only a half turn, while others required about 3 turns. Of course it could have been variation within the coils, but they all ohmed out exactly the same - seems more likely the springs were the culprit. Also i doubt the chinese suppliers scrutinized piece parts the same as they would product - just my guess.

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