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I'm going to do a series of videos on the Kadee coupler for O scale. This is part one, explaining the basics of the coupler and the tools required to convert your cars or engines. The 3RS guys are already well aware of these couplers so I will post it here for the Hi-Rail guys like myself. If you want to learn about Kadee couplers for O scale, or maybe just curious, check them out. Many people feel that it's a waste of time, money, and energy because we have a center rail. It's a part of our hobby that I really enjoy doing, and it's really NOT that big a deal for an extra $5 per car.  

 

PART 1

 

 

PART 2

 

 

PART 3 

 

 

Converting 3R Freight Cars

 

 

 

Last edited by Former Member
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Originally Posted by AMCDave:

Good solid info.

I used and use them in HO for all my stock.

But for O 3R I'll stick with the claw...

 

That's about how I feel.  I used nothing but Kadees when I was working in HO and N, but I feel no great need to start converting my 3Rs equipment.

 

But I do thank the OP for his videos.  I have no video equipment myself, but I wish I'd had it when I installed full 700E valve gear on my Lionel 783.  It might have saved other modelers a lot of trouble to see how someone else dealt with the problems involved.  Video tutorials are a great idea for those who have the equipment.

 

 

Originally Posted by trainnut56:

This is very helpful as I've been wanting to do this for quite some time, very informative.  Thanx Jim

Jim that is exactly why I decided to do the videos on the Kadee couplers. I have met several people, and read many posts, where guys want to do it, but don't know much about them and the process. Hopefully these videos will help the guys on the fence to make the decision to jump to the other side.

 

Originally Posted by Ron H:

Do you think the 740s switch better than the 805s ? And do the 740s mate up well with the 805s ?

Are the shank length the same?

 

I've done about half my cars with the 805s and could readily go forward with the 740s.

 

Thanks, Ron

Ron, this is where I myself am still on the fence. I haven't spent a lot of time switching cars with the 740 or the combo 805 with 740. My initial findings are that (IMO of course) the 805 "works" better for switching, and that the 740 does not couple up with the 805 that easily when switching. There is a noticeable difference in the "amount" of movement in the knuckles of the 2 different types of couplers. The 805 knuckle opens quite a bit further, and from what I can see, it's because of the difference of the external knuckle spring of the 805 versus the internal spring of the 740.

 

If you are just running trains (no switching) they mate up just fine, no issues at all. I will be doing a video in the near future to compare the 740 and 805 for switching purposes.

 

The shank lengths, or at least the total length of the 2 couplers LOOKS to be the same. I have not checked the specs on the Kadee website for an exact comparison, but they look the same to me. If they are not the same, they would only be off by a few thousandths.

 

I stopped buying the 805's, just because I like the looks of the 740 so much better because of the hidden spring. 

 

Originally Posted by AMCDave:

Good solid info.

I used and use them in HO for all my stock.

But for O 3R I'll stick with the claw. 

200 locos, 500 cars times $5 AND the time....some well over an hour each.....I'd never finish!!!

Dave, it's definitely a hassle when trying to start from behind. I decided to do it when I had only about 40-50 cars. When you do 1 car at a time, it takes forever. I did groups of cars that were of the same type. The thing that takes the longest is finding the correct depth of your shim/spacer for the different types of cars. That is trial and error, no way around it. Once you know what shims a specific car takes, they go quick.  

 

It's definitely not for everyone in the 3 rail market, but there are people who would like to do it, so hopefully my videos will help make the jump for those on the fence.

Very well done video, Doug. Keep 'em coming.

 

Like you, I switched over to the 740 series for my conversions. The 745 is necessary ONLY if you have a brass freight car and operate on 2-rail to completely electrically insulate the car from its brass neighbor. The only engines I can think of that require the 743 short box/short shank are the 44-ton (pilot is very shallow) and the MTH GP35 (rear pilot is very shallow, but you could grind down the truck block coupler mount and use a 740).

Originally Posted by AMCDave:

Good solid info.

I used and use them in HO for all my stock.

But for O 3R I'll stick with the claw. 

200 locos, 500 cars times $5 AND the time....some well over an hour each.....I'd never finish!!!

I started with my Weaver cars as they're an easy switch. Already drilled for Kadee couplers and changing out the wheels is easy if desired. I go out and get a batch of couplers and do the cars in batches of two to five. I also switched over to scale-wheeled cars on my new Atlas purchases as they work fine on flat-top track at 36" radius (O-72) or larger.

 

Another thing that has defrayed some of the cost is I got on a "buddy system" with a couple of forum members -- swapping hi-rail trucks/couplers for their scale counterparts (I'm converting a pair of new cars for one of them right now).

 

Originally Posted by marker:

Part 2 was excellent.  Although I've installed a lot of Kadees, I have never come across the punch trick to hold the box together when mounting.  That's a good one!

I can't even remember where I learned that. Maybe in the instructions, but I don't remember ever reading those either.

Originally Posted by Laidoffsick:
Originally Posted by marker:

Part 2 was excellent.  Although I've installed a lot of Kadees, I have never come across the punch trick to hold the box together when mounting.  That's a good one!

I can't even remember where I learned that. Maybe in the instructions, but I don't remember ever reading those either.

Part 2 was great. I've been slightly squeezing the boxes to keep the lids on -- not enough to misalign the screws, but enough to snap the lid on. Your way is much better and more precise. Atlas cars are set up for 2mm screws, but 1-72's will work without drilling.

 

Hadn't thought about enlarging the holes, but that's a great idea as some cars are a bit "uncooperative" aligning the boxes.

Originally Posted by Laidoffsick:
Originally Posted by marker:

Part 2 was excellent.  Although I've installed a lot of Kadees, I have never come across the punch trick to hold the box together when mounting.  That's a good one!

I can't even remember where I learned that. Maybe in the instructions, but I don't remember ever reading those either.

Laidoffsick your correct it's in the directions

 

clem k

Hey Clem, thanks very much for the tip. My grinder doesn't normally set there on "that" work bench. I just put it there for a better angle/view for the camera. I have another bench where all the "bench top" tools sit on, and it has a non slick surface for everything to stay in place. Just too many tools on there for a clear camera view while I was doing the video. My wife puts those rubber mats under all of our rugs on the tile floor    

Last edited by Former Member

Just watched part 3, another very informative video. Looks like very good ways to overcome some of the conversion problems. Have you ever thought about sending your ideas/methods (or a link to your excellent videos) of modifying the couplers and doing the conversions to Kadee? You never know, they might just start making some like that. That was just a thought, but might be worth a try, they might just be interested. If not, I'm sure they would be impressed.  

Hi Doug,

 

When you put the original coupler and the Kadee next to each other, there is such a noticeable

difference. The Kadee looks a million times better and so realistic. The same goes for the fixed pilot, it looks so much better and realistic. Thanks for taking the time to post these very informative video's, keep them coming.

 

Also looking forward to your next video Layout update

 

Alex

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