• If you like antique engines, vintage tractors or old iron, please register and join us. When registering, please provide your CITY and STATE as your location!

WK40 McCormick - How Many Are out There?

Titan1020

Registered
Last Subscription Date
10/03/2016
Re: WK40 Mccormick - how many are out there ?

Funny, I sold him one about a year ago. Guess he's had enough of them.
 

Eric Best

Subscriber
Last Subscription Date
07/13/2019
Re: WK40 Mccormick - how many are out there ?

Something like 6,454 6 cylinder W, WA, and WK-40 tractors, per C.H. Wendell were made. I have close to 200 survivors on my serial number search and I suspect I've just scratched the surface. I have 14 of them, myself. Certainly, "hundreds" of them are out there. Not a rare tractor but rare to find operable and with the correct engine and wheels. Getting very difficult to find decent original manifolds. These tractors on Craigslist are probably a good deal, just guessing, assuming the engines are correct. You can't rebuild a stuck rusty one for that.
 

Nick Feltis

Registered
Re: WK40 Mccormick - how many are out there ?

You have 14 of them? I own one that I repaited that looks nice its a late 36 with cut downs on. Mine has the rd450. Do you know where I can find a manifold for a good price. rosewood michineing seems a little steep.
 

gleaner

Registered
Re: WK40 Mccormick - how many are out there ?

I am looking for a W-40 that my Grandfather bought new in 1937. I was told that it did survive the scrappers as it was sold from a junk man in Caldwell, Kansas to someone in Missouri in the 1960's. The serial number is #WKC 5981
Had factory road gear, rubber tires, lights & starter.
 

KrosnicW

Registered
Last Subscription Date
11/14/2013
Re: WK40 Mccormick - how many are out there ?

I've had two, both 36's. One's a runner on full steel and one was a fencerow tractor but had round spokes and road speed, I traded it for something else, then picked up a RD450 and now have nothing to put it in.
It's a nice tractor with a sound of it's own. It actually drives and steers easier than my I-12.
 

Nick Feltis

Registered
Re: WK40 Mccormick - how many are out there ?

Ok, with my RD450 is the manifold the same as a 289 so if I can find an old factory manifold it will bolt right up? And if I do go with a Rosewood manifold, are the gonna be two small to let the 450 breathe like it should?
 

Brian Ahart

Registered
Last Subscription Date
03/28/2015
Re: WK40 Mccormick - how many are out there ?

Dad and I have a late '36 WK40 that my grandpa purchased in the early 1960's. It's always been on rubber since it's been in the family, but was originally on steel (I'm guessing). The fronts are cutoffs but the rears are F&H cast centers with period 15-32 Goodyear Sure Grip tires still in good shape. If anyone can offer some information on the F&H centers, I would appreciate it. The casting number is W288B. I have alot of pictures I've saved over the years but have never seen another set like these. Did F&H offer these just for the 40, as a steel-to-rubber conversion?
 

Mark Schneider

Registered
Last Subscription Date
11/14/2018
Re: WK40 Mccormick - how many are out there ?

And if I do go with a Rosewood manifold, are the gonna be two small to let the 450 breathe like it should?
The common RD450 in the truck application included a 2 bbl. carb with a 4'' exhaust. The exhaust outlet on the FBB 298 kerosene manifold is 2 1/2" ID plus other internal restrictive cast webbing used on the heat riser mechanism.

If all you are going to do is chug through the tractor parade it will probably work out fine. If you are going to pull extended runs with a 4-14 plow and packer your Rosewood manifold will undoubtably change colors on you.
 

Eric Best

Subscriber
Last Subscription Date
07/13/2019
Re: WK40 Mccormick - how many are out there ?

I would think you'd also have an issue with drawing the needed intake through the original K5 variant carburetor (K50-AY12 or whatever it was).
 

Mark Schneider

Registered
Last Subscription Date
11/14/2018
Re: WK40 Mccormick - how many are out there ?

Did F&H offer these just for the 40, as a steel-to-rubber conversion?
The only F&H rear wheel listed in the W-40 parts book (TC-19) is F278 which is the one piece round spoke rim. It may be possible that the F&H wheel combination that you have was a rubber tire option for the late 22-36's. The axle sizes between the two models are the same.

A friend of mine owns 3 W-40 tractors and together we are trying to get a least one unit operable. Does anyone out there know if the 34" rims off a W-9 will fit on the W-40 cast centers (#5587 D)? The originals were 32" with lock rings and I know that the very early W-9's also used this configuration. Has anybody tried this?
 

Eric Best

Subscriber
Last Subscription Date
07/13/2019
Re: WK40 Mccormick - how many are out there ?

Yes, the W9 drop center rims will fit the W-40 cast center. Try to stick with a rim that doesn't move too much of the tire toward the fender or you may not have enough clearance inside. The normal W-9 rims, I do fine with.

As for the F&H cast center for 40s, I have seen several sets. The parts book doesn't mention them and I am sure they were available after market. They make a nice looking wheel on the 40s and they use the 162 F&H weights, no starter weight (161) required.
 

Brian Ahart

Registered
Last Subscription Date
03/28/2015
Re: WK40 Mccormick - how many are out there ?

Thanks for the information. I agree, they make a nice looking package on the 40, of course I'm somewhat biased. Thanks to the Admins for allowing this newbie a little 'leeway' with my rubber-tired discussion on the steel-wheeled forum. I've always been intrigued with the 40. I have alot of good memories as a kid with dad and grandpa running the 40 on the sawmill. That's where I sharpened my sawdust-shoveling and slab-carrying skills. :) You could hear that 40 under load a mile away. At one time, we had three in the family between my grandpa, great-grandpa, and great-uncle.

Just to clarify, here's a picture showing the cast centers in question.

 

Eric Best

Subscriber
Last Subscription Date
07/13/2019
Re: WK40 Mccormick - how many are out there ?

Bahart - Your cast centers are even different from my F&H cast centers. Mine have no casting number and the F&H is stamped rather than cast into a flat place on the hub. The part number may have been there at one time but rust has long since helped it disappear. One other difference is that my F&H cast centers take full drop center 8" x 32" rims. Yours appear to take the semi-drops like those used on the standard 40 cast wheels. Interesting. Even with all of these tractors I have and have seen, I learn something new all the time!
 

Mark Schneider

Registered
Last Subscription Date
11/14/2018
Re: WK40 Mccormick - how many are out there ?

What model trucks did the RD450 engine come out in?
The Red Diamond engine was a popular IHC heavy truck motor.
The most common models locally include the KB series 8 and larger and the R series....R185, R190, R210. There are other models also. A internet search may be of value.

A brief history on the Red Diamond engines:

The FBB-298 engine was improved on and became the popular RED engine during WW2 in military trucks. This engine evolved into the well known RD engine which IHC used in their heavy trucks until 1974. These engines came in a wide variety of displacements from 318 to 450 cu. in. all using the same basic motor block configuration. The RD 501 was the largest engine of this family but the block casting has a relocated camshaft centerline due to the increased length of stroke.
 

D40Inter

Registered
Re: WK40 Mccormick - how many are out there ?

What's involved in making one of these RD engines fit in a W40 do they just bolt in or do you have to change things Eg Manifold governor flywheels etc
 

Eric Best

Subscriber
Last Subscription Date
07/13/2019
Re: WK40 Mccormick - how many are out there ?

Actually, what's involved depends on how much you want it to look like a W-40 at the end of the process. To use the front engine hanger from the W-40, you will want to change the timing cover. This also means you will be able to use the W-40 and magneto drive so that's a plus but you will either have to plug the top center bolt hole in the timing cover or drill and tap a very shallow hole in the front of the block to accept a short bolt in this position. The nose on the 450 crankshaft will not accept the W-40 fan drive pulley without machining and if you do this, you will want to do it so the fan pulley tightens against the crankshaft gear, not a step left on the crankshaft (I made this mistake but caught it before the engine was assembled.

The flywheel housing will bolt on the 450 block and depending on the block casting, the bolt holes may or may not be the same size. The crankshaft in the 450 does not have the felt wick provision for lubricating the pilot bearing for the clutch so you will have to find a way of addressing that. You can use the W-40 oil filter base on the 450 block, I'm pretty sure. I can't remember if something needs to be done to the W-40 flywheel. The 450 uses bolts to secure the crankshaft and at least some of the 40 cranks use studs with nuts. I seem to recall someone saying that the holes had to be drilled out on the flywheel but don't quote me on that. In any event, you will want to use the 40 flywheel, and, trust me, it's more than heavy enough for the 450 engine.

The manifold from a W-40 will bolt right on the 450 head but earlier entries in this thread have already raised the appropriate issues with operating the restrictive manifold on the larger engine. Finally, the water outlet on the 450 head will interfere with the W-40 manifold so some customization will be required there.

I think that should cover most of what is involved but hopefully others will chime in if I have missed something. Incidentally, if you can find one, the RED450 looks a little less modern than the RD450 (generally 3 frost plugs instead of 5) and makes for an engine that looks a little closer to the FBB-298.
 

Brian Ahart

Registered
Last Subscription Date
03/28/2015
Re: WK40 Mccormick - how many are out there ?

Bahart - Your cast centers are even different from my F&H cast centers. Mine have no casting number and the F&H is stamped rather than cast into a flat place on the hub. The part number may have been there at one time but rust has long since helped it disappear. One other difference is that my F&H cast centers take full drop center 8" x 32" rims. Yours appear to take the semi-drops like those used on the standard 40 cast wheels. Interesting. Even with all of these tractors I have and have seen, I learn something new all the time!
Eric, yes these are split rims. Attached is a close-up.
 

Attachments

Top