MM Power units

Today I found a MM power unit tag on the frame says HUA 67042 the tag on the motor says 4 5/8 x 6 6cyls HEB 161812 runs on gas Any help? Thanks Brad
 
here are some pics
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It is a 605. I didn't know that they made them in gasoline-knew they made LP, natural gas and diesel, other than the fact that they were hellish good irrigation units I don't know a lot except keep the rpms stock(1500-1550) or they don't live long. I imagine the puller guys would love to get hold of it.
 
Only six , 605 power units were made in a diesel version. Some have said that they were put in fishing boats along the gulf of Mexico. clint.
 
I got hold of one too -this engine has positive crankcase ventilation ---look at the picture and you can see the steel lines coming from the cast iron valve covers to the intake manifold ---the radiator has TWIN CITY casted on the top tank-----real neat since it is nearly 60 years plus old----
 
mmoon , Yes it does have Twin Cities on the radiator any pics of yours? Have you found any parts sources? My intake manifold is busted. Thanks
 
Brad--as far as I know the parts are inter -changeable with the 500 series engines --the thing that made these engines different was the stroke ---the heads are the same as other molines except for thickness ---the jugs are the same as a 403 or 336 except for height 6in. ---the manifolds should work off of a six cyl tractor engine -Jeff Garvert 308-946-2146 -the engine I have is in new condition except that it was setting outside and got water in it--it was stuck --we took apart and it does not look like it ever ran ------ lee----410 -398- 6610
 

I posted this pic a few years ago of an HUA Dad has on a well, but it is still good... ha... It was on a place that my grandpa bought in 1947 and still has the same original cast iron pistons in it as 1947 (which I assume had to have been original at that time).

It had an old hand crank on the front of the engine as part of the stand when I was a kid, but also has a starter, which is what we always used. It is natural gas, but we always have to prime it with a little gasoline in the intake manifold petcocks and then it starts like a car.

Not sure why it is quirky like that - none of our 605s or 800s or HD800s are like that...


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Hey Howard---I am not knowledgeable on some of these engines but was this water cool from the well?
 

Yes - you can see the gray water lines along with the natural gas line...

Those 2 lines go to a cooling coil which circulates the engine cooling fluid in copper coils with the irrigation water out of the well flowing over the coils... Works slick as a whistle and doesn't waste any extra hp like running a fan would.

I had an engine on a big well one time that could barely pull it - and I was having trouble with it heating - so I added a fan to help with the cooling - and was surprised to see how bad that hurt me on the barely-enough-power problem. I wound up buying a bigger cooling coil assembly & took the fan back off in that instance.

I also would usually take the thermostat(s) out and just put a plate with a hole drilled in it (5/8" or so) - and that would be about right to keep it at the right temp - and then I didn't have to worry about sticky thermostats or anything. Since the loads stay so constant over long periods, it works fine for irrigating.


HH
 

I never noticed that, Brad, but will look next time I'm out there.

My guess is like in tractors - where there is a engine tag as well as a tractor tag - some of the integrators sticking engines in various applications also put tags on their stationary frame assemblies...


Howard
 
What you have is a very early 605 that was sold just after the merger of the companies that formed Minneapolis-Moline. That is why the "Twin City" radiator. (using up old stock maybe). The gas versions were very low compression; (many 60-120#) and could be hand cranked if you had enough "lead" in your britches. Same basic design that was used thru their history. Just a very early build.
 
Were there ever any brochures or other literature for the 605 diesel power units? My dad had been telling me for years that they existed, but I never believed him until now.

Michael Moeller
[email protected]
 
I guess I am a little suprized that both of these engines show to be two cylinder block engines when I have always heard of 1948 as the year the UT went from one 4 cyl. block to 2-2 cyl. blocks. Guess M/M had perfected the 2 cyl. setup before it went in the tractors.
Bryce
 
The KE or solid block engine was used in the U series tractors until the late 40s. The larger engines were separate; 2cyl per jug design. That is also the case on the Twin City tractors. I do not recall the T/C numbers; but; the tractor replaced by the U series was single block; The tractor replaced by the G series was "split" design. (GTA; GTB; GTC). U is 283 c.i. & G is 403. 605 is same design engine with 2 more cylinders than 403. Jugs; pistons; etc.. interchangeable.
 
i had a earlier model 605 power unit than the ones in the pic that came from a local sawmill. it sat for many years after they quit with it and then they where scraping all the leftover stuff and i got it before it went to scrap. it wasnt stuck from sitting but missing the mag. it had the old big cast pot belly intake and manifold with the primer cups on it but it was busted. it had 4202 heads on it.
 
The "cast in Pairs" engines went back to Twin City, they developed them. MM Continues to make & Improve them, right on up to the HD800. I always heard old-timers say, that the decided it was a mistake to go with the single blocks on the MT & KT, which led to the U, and went back to tractors using the split blocks. That was a MM adv. gimmick, rebuild only the part of the engine that needs it.
 

Hey Brad -

I sent you one, but I've had trouble in the past with messages not making it through the board system...

My email is howardh at opsu.edu if you don't get the one I sent...


HH
 

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