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WK40 Mccormick - how many are out there?


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  #121  
Old 02-09-2014, 12:31:58 AM
Brasherman Brasherman is offline
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Default Re: WK40 Mccormick - how many are out there ?

Yep, these were in service upgrades and the heads are in between a first gen TD-14 and the old TD-40. I am trying to decide if it would be something to pursue for the old vertical head I have.
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  #122  
Old 02-09-2014, 01:20:28 AM
Guy Fay Guy Fay is offline
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Default Re: WK40 Mccormick - how many are out there ?

I gave my service bulletins to the Wisconsin Historical Society, still have a copy of the database. There is a service bulletin S-5401 from 1947 that discuses the replacement of the older pumps with the newer single plunger pumps.
Also 5826 from 1948 discuses field replacement packages.
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  #123  
Old 02-09-2014, 03:42:49 AM
Guy Fay Guy Fay is offline
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Default Re: WK40 Mccormick - how many are out there ?

6334 discusses the A type pump.
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  #124  
Old 02-12-2014, 12:07:42 AM
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Eric Best Eric Best is offline
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Default Re: WK40 Mccormick - how many are out there ?

I have the instructions and parts list for installing the field change single plunger pump conversion packages. The kit was slightly different for each head type and for each application (WD/ID, TD, and PD). The problem for the WD-40 is that the parts list is incorrect. To clear the frame, the correct pump base for the single plunger pump is a two-piece affair and the filter housing bolts to it. For the TD and PD-40 the pump base has the filter base cast with it in one piece. You will sometimes see a WD-40 with the TD or PD 40 kit on it. The frame is generally notched to clear the filter base as it doesn't set in far enough. This is not required when you have the correct pump base. I have two of the correct conversion kits for the WD-40 and these are the only two I have seen so far but I'm sure there are more. Units with this conversion must be tripped by hand like an MD or TD-14, etc., so you lose the fun of the automatic cutover that seems to fascinate people so much. If you get the gas idle speed set right and the governor just so, you can set the diesel throttle ahead just enough that when the old style pump trips, you don't even have to be present for it to run as a diesel! That can be fun for an unsuspecting audience.

As an aside, I recently acquired a Bosch 4-plunger pump attachment for a PD-40. This attachment was only ever available for the PD-40 and was supplied, I'm sure, to meet equipment manufacturer's specifications for tight speed control. It has yet a different pump base. I hope to restore this for one of the 40s I have someday.
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  #125  
Old 02-12-2014, 01:37:47 AM
Sloroll Sloroll is offline
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Default Re: WK40 Mccormick - how many are out there ?

Thanks for the information Eric. It a disappointment that the change-over would be manual rather than automatic. Does there seem to be much difference in value? Personally it wouldn't me as I think they are cool, historic machine regardless. Too it seems parts would be easier to come by.
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  #126  
Old 02-13-2014, 10:30:20 AM
KevinGWeq KevinGWeq is offline
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Default Re: WK40 Mccormick - how many are out there ?

I love to learn about the McCormick gas start diesels,could you please explain the operation of this automatic changeover feature or perhaps point me to some literature??

Thank You

Kevin
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  #127  
Old 02-13-2014, 06:22:22 PM
Brasherman Brasherman is offline
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Default Re: WK40 Mccormick - how many are out there ?

I think that's a post for another thread! Why don't you start a new thread and ask that very question? I know I still haven't got a clue as to what I am missing for my vertical head motor to put it back to stock. I really need to go to Grandma's and look through the barns.....
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  #128  
Old 02-13-2014, 09:22:58 PM
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Craig A Craig A is offline
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Thumbs up Re: WK40 Mccormick - how many are out there ?

^ Great idea........so I DID.......

>>> http://www.smokstak.com/forum/showthread.php?t=130528 .......
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  #129  
Old 02-13-2014, 10:32:29 PM
Brasherman Brasherman is offline
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Default Re: WK40 Mccormick - how many are out there ?

Thanks Craig!
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  #130  
Old 02-13-2014, 11:52:16 PM
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Eric Best Eric Best is offline
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Default Re: WK40 Mccormick - how many are out there ?

Sloroll - You asked about value with and without the original type injector pump. I guess it depends on who you ask. The automatic switchover and the appearance were always important to me so to me, I would say it makes a difference. Maybe $1000 or so in value. The engines also run completely differently on the original vs. the single plunger pump due to the cam profile on the plungers.

That said, I have every intention of restoring one or two with the field change package, just as a part of 40 diesel history. I have a 1937 WD-40 running a single plunger pump that is set a little warm and we got 75hp out of that on an M&W dyno. The single plunger pump is clearly superior and greatly simplified or eliminated cylinder balancing but the 4-plunger pump has a sound all its own and you can't beat the look!

---------- Post added at 09:52 PM ---------- Previous post was at 09:50 PM ----------

Quote:
Originally Posted by Brasherman View Post
I think that's a post for another thread! Why don't you start a new thread and ask that very question? I know I still haven't got a clue as to what I am missing for my vertical head motor to put it back to stock. I really need to go to Grandma's and look through the barns.....
Brasherman - Your aren't that far from me and you are welcome to come take pictures of anything you need for the vertical head parts you are missing.

Eric.
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