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I have had this Joshua Lionel Cowen series for some time now, and now have tries to replace. The instruction booklet does not give a real clear cut instruction as to how to change the tire. Right now I am concerned with the rear engine assembly that needs the tire(s). The grooved wheels have the rods  in the way (much less the cross heads), of the screws; and it looks to me like I will have to unscrew all the rods including the main rod. Can someone help me with this problem? Any tips?? Thank you. Happy Holidays.

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I am attaching two photos of the problem. As you will note, the nut driver cannot fit over the nut on the driver because the crosshead is in the way. It was hard to capture the rods as far down as they go before coming up. Also the main rod, crank, what type of tool is there to take these off? The connecting rods are pretty much one long piece therefore Everything must come off. This is quite the design flaw.

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  • N&W Y6b rods: what tool to unscrew this?
  • N&W Y6b rod clearance: connecting rod can't go any further thus crosshead is in the way

It's not that bad.  Just follow what was posted in the other thread.  Remove the side rods from the other three wheels and thread the rod connected to the front wheel through the traction tire.  Yes you will need a couple of picks to help in the process.   You will need to remove the eccentric bolt and rod.  Take a photo prior to your start to help remember the orientation.  No need to remove the castings or wheel sets, etc.

Without the tires, your engine will slip if pulling any amount of load, going up an incline, etc.

Dave’s got it right, …and I’ll add, ….to make your job go smoother, do one side at a time. My advice, first thing to do, run the engine very slowly, and place the crank pins (rod bolt screws to you ) at the 6 o clock position, ….you’ll thank me later!….plus it makes orientation of the rods simpler with a photograph,…..at every 6 o’clock position, you’ll notice the eccentric follows the trajectory of the main rod,….

Pat

Last edited by harmonyards
@harmonyards posted:

Dave’s got it right, …and I’ll add, ….to make your job go smoother, do one side at a time. My advice, first thing to do, run the engine very slowly, and place the crank pins (rod bolt screws to you ) at the 6 o clock position, ….you’ll thank me later!….plus it makes orientation of the rods simpler with a photograph,…..at every 6 o’clock position, you’ll notice the eccentric follows the trajectory of the main rod,….

Pat

Yes I have noted that position of the crank doing other locomotives.

Yes that is why we have the problem, you cannot get to the entire head of the screw as the head is in the way. And one person said that when he backed out the screw using a different wrench, the head hit the rod before it could be extracted.

Ugh, that sounds like the CC2 or the Cab Forward, both much more ugly traction tire installations!

I've replaced tires on so many of these Y6B's. These have removable drivers since the chassis design is similar to a brass model. The bottom of the frame can be remove to allow you to drop the driver set enough to remove the bolt. The drivers can then be removed to install tires. Might seems like a task, but it is much easier than using a bunch of tools to try and get the tire on. Just my take on this tire replacement.

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