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Hatz Z790 Diesel

diesel hatz hatz z790 diesel repower

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#1 Utah Smitty OFFLINE  

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Posted July 16, 2013 - 12:46 PM

I've come across a lot of Hatz Z790 diesel engines for sale in the local area... turns out a local AFB has them for sale on auction.

 

The engine is air cooled, 2 cylinder, and puts out between 18 to 26 hp or so, depending on how they're set up.  They're pretty tall--approx. 27", so I'm wondering how they'd work to repower my JD420, and maybe, ultimately, my Dayton 3Z678 (MTD 995).

 

I searched the forum and couldn't find any information... has anyone used these in a repower, or have experience with them?

 

There's a YouTube video listed below that shows one running.

 

Thanks,

 

Smitty

 

http://www.google.co....48705608,d.dmg

 


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#2 olcowhand ONLINE  

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Posted July 16, 2013 - 02:18 PM

Man, that's a huge engine!  Hard to put it into any GT I'd say.


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#3 Utah Smitty OFFLINE  

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Posted July 16, 2013 - 02:21 PM

Yeah, that's my concern as well...

 

Smitty


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#4 jd.rasentrac OFFLINE  

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Posted July 16, 2013 - 02:39 PM

Hi Smitty, these HATZ Diesel are real high quality engines. Here they were used in plate vibrators for example. Up to the 1960's HATZ build tractors, too.


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#5 Cvans OFFLINE  

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Posted July 16, 2013 - 03:57 PM

At 425 lbs that would definitely be a mouth full for a garden tractor. They are probably built to last forever like the Listers 

Do you have any idea what they go for on the auctions?


Edited by Cvans, July 16, 2013 - 04:01 PM.

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#6 UncleWillie ONLINE  

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Posted July 16, 2013 - 04:14 PM

Wow what are those selling for. It give me all kinds of bad ideas.


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#7 Cvans OFFLINE  

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Posted July 16, 2013 - 04:23 PM

I did a little digging into these engines and came up with some interesting information. Olcowhand  was involved in a discussion about these back in 2007 on another forum and some good information was brought up by people involved with the maintenance of these engines. First off, it would seem they are designed to operate only at 3000 rpm or idle. Sounds like you flip off the idle switch and hang onto your hat.  :smilewink:  As mentioned above they are very heavy. It looks like the opening bids on the Gov. auctions starts at $25.00. The highest bid I saw was $200.00. Hill AF base seems to have a bunch of these things available. 

Now if we can convince Smitty to pick one of these up and give us an update ............ :thumbs:


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#8 olcowhand ONLINE  

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Posted July 16, 2013 - 04:50 PM

I did a little digging into these engines and came up with some interesting information. Olcowhand  was involved in a discussion about these back in 2007 on another forum and some good information was brought up by people involved with the maintenance of these engines. First off, it would seem they are designed to operate only at 3000 rpm or idle. Sounds like you flip off the idle switch and hang onto your hat.  :smilewink:  As mentioned above they are very heavy. It looks like the opening bids on the Gov. auctions starts at $25.00. The highest bid I saw was $200.00. Hill AF base seems to have a bunch of these things available. 

Now if we can convince Smitty to pick one of these up and give us an update ............ :thumbs:

 

Now after 6 years, I have totally no recall of that discussion at all!   :(   

 

  But yeah Smitty....they'll fit in there easy as pie!  :smilewink: 


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#9 JDBrian OFFLINE  

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Posted July 16, 2013 - 04:53 PM

27" tall, that will require major surgery to fit in a 420.  It's pretty wide and deep as well with air cooling.  A nice engine for a belt driven gen set or some other stationary application. Just checked out the video. It's biggg!!


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#10 larryd OFFLINE  

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Posted July 16, 2013 - 08:46 PM

Sounds a nice engine for maybe an articulated stiener

 

larryd



#11 Utah Smitty OFFLINE  

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Posted July 16, 2013 - 09:25 PM

At 425 lbs that would definitely be a mouth full for a garden tractor. They are probably built to last forever like the Listers 

Do you have any idea what they go for on the auctions?

Varies a little, but seems to be from $150-$350.

 

Smitty



#12 Utah Smitty OFFLINE  

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Posted July 16, 2013 - 09:30 PM

I did a little digging into these engines and came up with some interesting information. Olcowhand  was involved in a discussion about these back in 2007 on another forum and some good information was brought up by people involved with the maintenance of these engines. First off, it would seem they are designed to operate only at 3000 rpm or idle. Sounds like you flip off the idle switch and hang onto your hat.  :smilewink:  As mentioned above they are very heavy. It looks like the opening bids on the Gov. auctions starts at $25.00. The highest bid I saw was $200.00. Hill AF base seems to have a bunch of these things available. 

Now if we can convince Smitty to pick one of these up and give us an update ............ :thumbs:

 

Yep, Hill AFB is two miles north of me.  Plus, as a DoD civilian, I have ready access... just show em my CAC card.  I'm tempted to bid on one, though I've frivolously spent my money on JDs, CCs, and Song... that darn song is going to get me yet!!!!  :bigrofl:

 

I'm going to see if I can go see them tomorrow... give me an idea of their condition.  Any specific things to look for besides the obvious--blocks with daylight showing, large pools of oil under them, cranks won't turn a full revolution, etc.

 

Smitty



#13 Cvans OFFLINE  

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Posted July 16, 2013 - 10:34 PM

I'm afraid that unless equipped with a compression release your going to have a hard time getting one revolution of the crank. If they are going for as little as I think it is no wonder that there are so many of them floating around in your area. 

These might make an interesting engine swap into something like a B Allis-Chalmers 


Edited by Cvans, July 16, 2013 - 10:36 PM.






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