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Some time ago I picked up a Williams 773 diecast Hudson. Didn’t pay a lot for I was mainly interested in its tender for another project. This version came with a prototypical cab number and a full scale, what some might call a 700T tender, instead of the smaller 2426 tender that the 773s came with.

This engine did suffer from jack rabbit starts that most Williams Post War reproductions seemed plagued with. It came with a 9:1 gearbox and despite cautions by master craftsman Harmonyards that a replacement motor would not solve this problem I decided to try a few that I had found along the way. That included a 24 volt motor and 2 12 volt motors spec’ed at 2000 rpm vs the typical 5000 RPM.

I used a ERR Cruise Commander set at one speed step and 100 speed steps to drive all the motors.

Here is what I started with.

This is the slowest the engine would run with any of the six that I tried though one smaller Buehler Motor rated at 2000 RPMs did turn slower it did not have enough torque to start a train.

I came to the conclusion like Pat did that no motor was going to solve this problem and the fix was going to be a new gearbox with a higher (numerically) gear ratio. I was able to find a NWSL idler gearbox on the Bay with a 23:1 gear ratio, closer to the 18-20:1 found in most MTH and Lionel scale steam engines.

I also settled on a Pittman 8700 series motor as it was small enough to fit in the boiler freeing up the cab after milling out some metal.

This is the final setup showing one speed step and flat out. I lose some top speed but it seems fast enough if not 100 mph.

This is the mod to the boiler.

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And how the cab looks now.

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Now back together awaiting detailing.

Pete

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Last edited by Norton
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The mill work inside the boiler, with the attention to detail is what catches my eye,….obviously beautiful chassis work as usual, and way to go taming the wild horse that is a Williams, …but I’ve got to get to get to that level on how you did the boiler casting,…..fantastic!….this is why you still wear the master’s jacket ,….I remain second fiddle,….😌

Pat

Very nice pete.   Ever wonder why Williams had all the weird 44:1,  42/1, 9:1 gearbox ratios. I do have some Williams with sane gearboxes but they seem to be in the minority. Their PRR B6 had a 21:1 which is just right for a mainline locomotive but a bit high for a switcher.  Lucky their 42:1 gearbox has the same gear on the drive axle and will swap with the 21:1 so I took the 21:1 from the B6 and put it in my N&W J and put the 42:1 from the J in the  B6. Both are happier for it.            j                      

The 42 & 44 to 1 gear boxes aren’t that miserable to fiddle with, ….usually the right Pittman motor will make them ….let’s say reasonably descent runners,….the fist fight with the diecast Williams Hudsons is the horrible 9:1,……there’s just no where’s to go,…you just can’t get a motor to spin that slow and make it smooth,….Pete’s certainly tamed it, so hats off to him,….I surrendered on my Williams Hudson and it now resides as a static display on the layout with little workers trying to fix something I couldn’t …..it would be nice if the gear boxes Pete found were more readily available as this would open a new frontier in modifying Williams Hudsons into nicer models worthy of adding more & more details,…..IF the gear boxes were easier to obtain, modding a Williams Hudson into a nice scale model would be a far cheaper endeavor than cutting up the old Lionel Pulmor Hudsons,….cause if you want a big can motor in a Lionel, step one is chop off the whole back of the chassis and cry cause you ain’t turning back!!…..I might be letting the cat out of the bag, but I got to watch every other evening as Pete wrestled this thing,….one thing he did that’s neat is he’s scooted everything forward, so now he can add important parts, like a full backhead, and judging by the depth of the motor, it ain’t gonna be stuck out the back like a Lionel,…..impressive work,…

Pat  

..

NWSL is back in business after a few years off line during a change in ownership.

I had ordered a 25:1 Mod .5 gearbox for this engine from them just a few days before I found this one on eBay as it typically the case. They are built to order so may take a few weeks.

Anyone wanting to do a similar swap can use either a mod ,5 or mod .6 25:1 and 23:1 respectively. This engine has a 5mm axle. A driver has to be pulled to remove the gear and axle bearings then requartered.

I could have just gone with a Cruise board as it does a lot to slow down the engine but wanted to take it to the next step.

I think the first speed step is close to Vision Hudson speed now.

Pete

Last edited by Norton

Those results are impressive. I have one of these Williams that I detailed a la 700E, and in which I installed a Cruise Commander/pre-RS Sound Commander. This made it useable. I have been happy with the now-steady running speed and slow-speed performance - at least until seeing yours. Gee, thanks.

I've posted this photo of it before; the valve gear still needs to be corrected/completed. That sand dome is a separate piece, as I recall - I was tempted to do a square sandbox/B&A J2 treatment.

HudsonWms-b

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D, the catch with simply swapping the gearbox is its much shorter than the existing one. With parallel shafts the offset is 3/4” requiring a belt drive. No room to tilt the big motor being so close to the cab roof. I had to grind the roof to be able to tilt that smaller motor.

BTW, very nice detail work. I will be adding details over time.

Pete

Last edited by Norton
@coach joe posted:

Gentlemen, how does the performance of the Williams 773 Hudson with the 2426 tender compare with a Lionel 18002 785 Hudson

It’s two different worlds Coach, ……the Williams 773 is a high geared can motor, and the 785 is an old school Pulmor AC open frame ….now, you want the best, have a 785 converted to a Pittman, and your jaw will hit the floor, ……even conventional, smooth as silk, run for hours on end, and never let out a whimper, no matter how many cars you toss behind it, ……the only limiting factor, put too many cars behind it and she’ll slip the drivers, ……but she won’t stall the motor,…😉

Pat

Thanks Pat.  I've been wanting a 785 for a while.  Thought it would require larger radius than I'll have but I've been told it will run 0-31.  I was at a train show today, 2 785s but for more than I want to spend.  The Williams 783 looked similar, black not gray, with spoked drivers and was only $250.  Now I don't need it to creep but sounds like it's it's a road runner and with a smaller layout I'll never be able to load it down.

@coach joe posted:

Thanks Pat.  I've been wanting a 785 for a while.  Thought it would require larger radius than I'll have but I've been told it will run 0-31.  I was at a train show today, 2 785s but for more than I want to spend.  The Williams 783 looked similar, black not gray, with spoked drivers and was only $250.  Now I don't need it to creep but sounds like it's it's a road runner and with a smaller layout I'll never be able to load it down.

The785 is a bit of an oddball mechanically Coach, …..beware,….to get the gauging to work at the factory, Lionel added a plate to each side of the frame, ……the gauging of a 785 is a touch wider than some of the others,……it’ll probably go through O31 ok ( ish ) but best suited on O42,……

Pat

Pat is correct, I have an old stock 785 and it runs nicely around 042 curves. You need to make sure it has that non scale small wheel front truck. My warhorse atsf hudson with scale front truck will also go around my 042 but it makes a ton of noise, might be some of that wider gauging Pat mentioned. I’m just surprised Williams put a 9:1 in their version lol

The 785 will run on 031.... But, it doesnt look right to me. She seems angry on 031 radius.  I run mine on 054 and it runs nicely. It was a shelf queen all it's life. Boy, talk about break in period with that bad boy. But, it isn't the quietest around. I like it as I only pull 3 plastic passenger cars. I don't want to overload it. She is a beautiful engine with the spoked wheels. I can run it slow enough to annoy me, so that's good enough. However a pittman swap doesn't sound all that bad.  🤔

The 785 will run on 031.... But, it doesnt look right to me. She seems angry on 031 radius.  I run mine on 054 and it runs nicely. It was a shelf queen all it's life. Boy, talk about break in period with that bad boy. But, it isn't the quietest around. I like it as I only pull 3 plastic passenger cars. I don't want to overload it. She is a beautiful engine with the spoked wheels. I can run it slow enough to annoy me, so that's good enough. However a pittman swap doesn't sound all that bad.  🤔

Same basic engine, my Warhorse from 1996. You can here it slip, but handles six aluminum cars easy even forcing the scale pilot truck around 042 curves. I think my warhorse is tighter on the gauge than my 785, but is the same thing Pat mentioned. Even two chuffs would make this wnging sound so much better lol.

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