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Post by ChessieFan1978 on Sept 29, 2024 10:39:16 GMT -8
So I purchased several pairs of Tangent ASF N-11 100-ton Trucks and went to replace the stock trucks on several pieces of rolling stock and the screws to attach the trucks simply slipped through the holes. So I thought well I'll order the Tangent screws they offer on their parts website thinking that would work. NOPE, the screws slip right through the hole in the truck and it falls off. Does anyone know what screws to use? It seems that there is no lip to keep the screw from going all the way through. It was the same for the other pairs of trucks.
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Post by TBird1958 on Sept 29, 2024 11:35:36 GMT -8
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Post by drsvelte on Sept 29, 2024 11:53:23 GMT -8
These little flat washers from Moloco should do the trick for you.   You may have to tease them a bit to lay flat on that little lip, but they work.  |
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Post by ChessieFan1978 on Sept 29, 2024 13:41:36 GMT -8
Thanks guys
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Post by azrailfan on Sept 29, 2024 20:27:05 GMT -8
So I purchased several pairs of Tangent ASF N-11 100-ton Trucks and went to replace the stock trucks on several pieces of rolling stock and the screws to attach the trucks simply slipped through the holes. So I thought well I'll order the Tangent screws they offer on their parts website thinking that would work. NOPE, the screws slip right through the hole in the truck and it falls off. Does anyone know what screws to use? It seems that there is no lip to keep the screw from going all the way through. It was the same for the other pairs of trucks. Matt, Just curious, and wanted to make sure I understood your question. Replacement Tangent trucks and screws on a Tangent car? |
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Post by ChessieFan1978 on Sept 30, 2024 3:53:12 GMT -8
So I purchased several pairs of Tangent ASF N-11 100-ton Trucks and went to replace the stock trucks on several pieces of rolling stock and the screws to attach the trucks simply slipped through the holes. So I thought well I'll order the Tangent screws they offer on their parts website thinking that would work. NOPE, the screws slip right through the hole in the truck and it falls off. Does anyone know what screws to use? It seems that there is no lip to keep the screw from going all the way through. It was the same for the other pairs of trucks. Matt, Just curious, and wanted to make sure I understood your question. Replacement Tangent trucks and screws on a Tangent car? |
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Post by edwardsutorik on Sept 30, 2024 8:53:34 GMT -8
I believe that the MDC cars use the NMRA RP-23 type of truck bolster (small hole), where the head of the screw is larger than the hole diameter, which should be .089".
I don't have the Tangent truck handy, but I am guessing that it's the Irv Athearn-style truck bolster (large hole). THAT hole is something like .128" (measured from one of Irv's products).
If your screw head is smaller than .128" diameter, it won't hold the Irv-style truck on, even though it held a small-hole truck on.
Irv designed his truck mounting system to use/need a "boss" projecting out from the face of the body bolster. This provides a landing point for the screw head to tighten against, while NOT locking the truck to the bolster. With the NMRA style bolster, you either lock the truck up solid or you have a loose screw, to provide some slop. Loose screws tend to rattle out, especially if the head is placed downwards and the object rattled around a lot. This tends not to happen with modern HO models, as they use sheet metal screws into plastic. The plastic is sort of gluey, and kind of bonds to the screw, keeping it in place. DON'T expect this bonding if the screw goes into metal (some HO models used to have metal body bolsters).
The Classic Solution for mounting Irv-trucks on non-Irv-body bolsters is to add a boss. Happily, just such a thing is provided on Kadee's typical coupler pockets. Remove the boss from the coupler pocket, and place it on the body bolster--glueing optional. I've done it LOTS of times. You MIGHT have to ream the truck bolster hole a bit.
By the way, all this stuff is based on American Standard measure, not Metric. Thus you should be using a #2 screw for mounting. A 2mm screw is a bit smaller, which MAY cause a problem.
Ed
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Post by nebrzephyr on Sept 30, 2024 8:54:12 GMT -8
Had the same problem several years ago with the replacement Tangent truck screws. The "replacement" screws were a different head size (and apparently still are) compared to the screws on the factory assembled cars. In taking to David at the time he didn't realize the difference in screw head size. I just used some #2 washers from McMaster-Carr. No Moloco in existence at that time.
Bob
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