HG engine swap

Kirk-NJ · January 05, 2016, 12:53:01 AM

I might be picking up a 1944 HG. The engine was tore down and a lot of the parts are gone missing. I would like to repower with a ford engine out of an 8n tractor or later hundred series ford tractor. Has another done this swap before? I have a bellhousing out of a jacobsen tractor and could pick up a trans to bolt up to it for an aux trans.

Thanks, Kirk

Doug424 · January 05, 2016, 08:45:00 PM

I know a guy who put a 172 Ford diesel in an OC -3. It was a lot of work, the frame had to be widened and he really just about built a whole new frame for it. It worked out OK, but you have to be real careful with it. The bigger engine has a lot more torque and Hp. I think an 8-n is a bad choice, if you go to all that work, I would use a more modern overhead valve engine. There were some smaller Ford industrial engines that might be a better choice. Also plenty of small diesels around, like Kubota, Yanmar, Isuzu, Perkins. etc.

I'm the type that believes in keeping things original, hacking up a machine often kills the value and unless someone really knows what they are doing, it often doesn't work out well. But I guess to each his own.

Kirk-NJ · January 06, 2016, 10:05:45 AM

Thanks for the reply. I didn't what to get into widening the frame just figure I might be able to use what I had laying around. The machine has been sitting for years outside under tarp. Head is off, engine locked up, it has no head,carb, starter, mag, generator, radiator. Just figure repowering with something I have would be cheaper than buying all the parts and rebuilding the engine. Maybe I'll just look around for a running HG/OC3 engine.
Thanks, Kirk

myownbossman · January 08, 2016, 12:27:55 AM

I had a 251 chrysler out of an Oliver combine in mine. Governed at 1500 rpm it still had twice the power as the original. the only frame mod I did was extend it so I had a place to mount the rad

Blake Malkamaki · January 08, 2016, 04:52:10 AM

We have the original experimental tractor for developing the OC-6. It's an HG with an Oliver 77 engine. Fit fine in the frame. Used the Oliver bell housing. They had to cut the gas tank in half so it's flat in the front and almost up against the engine. This tractor handled the power fine. They don't really have enough weight to hurt themselves.

Blake Malkamaki · January 08, 2016, 04:57:36 AM

There is a member on here Jim W who has an HG that has a Mercedes diesel engine that I originally sold to another guy. As far as I know, the project was never finished, but it could be by now. Do a search for Mercedes in the search command on this forum.

Blake

kiwiHG · January 08, 2016, 05:44:27 AM

I'm in the final stages of fitting a Datsun A15 and Vanette gearbox to mine. I have had it running and driving, it feels great.

It fits in the chassis with a couple of notches, nothing too serious.

Doug424 · January 12, 2016, 08:11:05 PM

I often thought of using an Oliver 66 motor. That makes a lot more sense than using an Oliver 77 6 cylinder and having it hang out way too far in front. I still say watch the HP and torque, the finals in those machines are weak as it is with a little IXB motor. The other major issue with these machines is the frame to transmission housing mountings. They were a major weak spot and were failing due to torque. If you double the horsepower and torque that point is going to fail even quicker. Over the years Oliver improved that area, but I still see frame mounting failures even in the later machines. If you are going to use the machine with a dozer or loader the excess power will be a factor. To take it even a bit further, if you add an extra transmission, you increase the torque further. If all you are going to do is drive it around with no load, engine size wouldn't be a factor.

Kirk-NJ · January 25, 2016, 10:12:38 AM

Ran across this interesting engine swap. Nice to look at but I thought the stand HG engine was under powered can't image one with a cub engine.
http://antiquetractorblog.com/2015/12/28/one-of-a-kind-cub-crawler/

Blake Malkamaki · January 25, 2016, 03:10:07 PM

I think a Cub engine would be a waste of time. Maybe an H engine if one wanted to go IHC?

kiwiHG · January 29, 2016, 05:35:48 AM

I think it's been done to look nice, not to do work.

Jethrow · January 29, 2016, 04:18:46 PM

I agree with Blake, not much power. I had a 1950 Farmall Cub. Other than mowing and cultivation, it could barely pull it's own weight.

A quick look at the TractorData site shows you would be giving up half the horsepower of a IXB3:

Farmall Cub Power:
Drawbar (claimed):   10 hp [7.5 kW]
PTO (claimed):   11 hp [8.2 kW]
Belt (claimed):   9.76 hp [7.3 kW]
Plows:   1 (12 inch)
Drawbar (tested):   9.87 hp [7.4 kW]
Belt (tested):   10.39 hp [7.7 kW]

Oliver OC-3 Power:
Drawbar (claimed):   22 hp [16.4 kW]

Jethrow

Doug424 · January 31, 2016, 01:54:19 PM

Farmall A motor would be a better choice. The originals were 113", then 123" The later versions were 135" that were used in the 340 tractors and many industrial applications. Great engines and easy to get parts for.

Blake Malkamaki · January 31, 2016, 06:45:45 PM

The A is a pretty small engine too. From the experimental tractor we have, we know it held up with the Oliver 77 engine, so I would opt for more power than the Farmall A. The thing is, the tractors are so light more power is not likely to cause damage because they will just spin out.

art · February 02, 2016, 02:42:03 PM

I recently put a MH22 engine in my OC4. The original was trash and I didn't want to spend the number of dollars it would take to rebuild it. In looking for something that would fit in the HP range, I decided that a frame tractor like the MH, Allis Chambers, Olivers would work the best, rather than trying to adapt to the Cletrac bellhousing. I ended up using the MH engine and bellhousing. It fit within the frame with newly fabricated engine mounts. Even used the original radiator.