AgTalk Home
AgTalk Home
Search Forums | Classifieds (136) | Skins | Language
You are logged in as a guest. ( logon | register )

Adding turbo to 766 IH
View previous thread :: View next thread
   Forums List -> Machinery TalkMessage format
 
HuskerJ
Posted 11/26/2021 11:22 (#9342764 - in reply to #9341555)
Subject: RE: Adding turbo to 766 IH



East of Broken Bow
cornfever43 - 11/25/2021 18:43

My dads old 766 needs to be redone and i was wondering what was needed if I had it rebuilt to add the turbo to it ? Wanting a little more power and thought it might make it a tad more quiet. Im assuming oil nozzles? And a bigger oil pump?
What about injectors and pump set up?


Dad's 766 Diesel developed a knock last year, after several years of having blow by equal to the exhaust flow, we figured it was pretty well had.
We also had an old 1460 combine, with a perfectly good engine that started and ran really well, that we were trying to sell, and our best offer after 2 years was $1500 to a scrapper (sad, really, as it had a LOT Of life left in it and was essentially field ready save for one tire).
Long story short, we took the engine out of the 1440, and had it transplanted into the 766. We do not have splitting stands, so we hired it done. We did as much of the little stuff as we could ourselves as we were working with a little mom & pop repair shop who had no problem with that. Basically, we stripped the tractor down as bare as we could, and still be able to drive it, they did the engine swap to get it drivable again, and we finished it up.

Cost was $4100, which included a new clutch.

Long story short, it fit right in there, no problems, with a couple little things to note.
When sliding the combine engine into place, the lifting eye on the combine engine hit the fuel tank before it was all the way back. The combine engines are installed/removed via a hoist (or loader in our case) using lifting ears. Those had to come off.
All bolt holes were there for the swap, the front of the engine sits 3-4 inches farther forward, but everything, and I mean everything bolted up as far as mountings and such. The exhaust even fit through the factory hole in the 766 hood. This is a non-turbo engine off a 1440. They tell me a turboed engine may have a different location.
The longer engine required removal of the fan spacer from the tractor fan, and a different radiator shroud. It might have 'worked' with the 766 shroud, but it just didn't look right. Shroud off a 966 was the ticket.
Ditto the air cleaner off a 966. The 766 air cleaner was the wrong size (as in hose size) to connect to the combine engine intake, again 966 one went right in.
Other little things to consider are that the fuel lines were too short because of the longer engine block, and also the throttle linkage was a bit short, too. Went back to the salvage 966 for the piece of throttle linkage that connects to the throttle arm on the injection pump, and redid the fuel lines. The only lines too short were flex lines, so we just cut new ones long enough to fit. After 45+ years, the lines were probably due a replecement anyway.
Lastly, the combine had a digital tachometer, the 766 was mechanical. Cured that with a universal fit electronic tach. The combine didn't even have the attachment point for the drive gear, and we would have had to remove the injection pump to install it. The universal tach was $20 and a little wiring. Lastly, we turned down the idle speed a bit because a 1440 idles around 1100-1200 RPM

All in all, it works pretty well, and everything looks right (unless you'd park it next to another 766 and notice the longer engine block). Power wise, it is now on par with a 966, but we don't work it hard enough anymore to worry about twisting anything off. With the idle turned down, it doesn't have much torque at idle - to the point of being gutless under 1000 RPM. We called a diesel shop, and they said that is because a combine is not calibrated for any kind of low RPM torque, but rather to run a constant full load RPM. We decided to leave it be, to keep the costs down, and after driving it around a while, you just learn not to take off with any kind of load at idle, open it up to 1000 RPM or so first.
Overall, very happy with the engine swap considering the cost. The Mom & Pop shop had a salvage 966 in the weeds that they got the little odd & end parts from, the $4100 was our total out of pocket. Oh, and we got $500 for the combine less the engine.
Top of the page Bottom of the page


Jump to forum :
Search this forum
Printer friendly version
E-mail a link to this thread

(Delete cookies)