John Deere 755 Turbo
- Thread starter Nick359
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I did some more work on the turbo today. When I pulled the valve cover I thought someone might have been in the engine before. When I pulled the oil pan, some was definitely in the engine before. The oil pan gasket is no longer available. The pan was RTVed without a gasket and the bolts were loctited. I broke one, so tomorrow I will have to fix that. Anyways here is todays progress.
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I finished the exhaust today. I don't think it is that much louder than stock. I turned the fuel up a half a turn or three flats. The turbo really woke up the tractor. I was doing some loader work today, and the engine was starting to bog a little. I looked down and I had it in high range. It runs better now in high than it did in low.
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I finished the exhaust today. I don't think it is that much louder than stock. I turned the fuel up a half a turn or three flats. The turbo really woke up the tractor. I was doing some loader work today, and the engine was starting to bog a little. I looked down and I had it in high range. It runs better now in high than it did in low.
Can you explain 'the turning up the fuel'. What/where is the adjustment and did you turn it in our out?
The adjustment is under the "cap nut" for lack of a better term. I turned the nut that is to the right of the picture away from the other. I turned the inside nut a half turn to start. Pulling the shaft out of the pump turns up the fuel. There is also an idle adjustment, but I did not touch that. It is under a cap nut above the main fuel or on the top of the pump depending on model.
The nut that is on the left was locktighted. I could not move it, so I put a slim washer between them, I cut part of it out to get it on the shaft, then backed the inside nut against it. I will try it tomorrow to see how it works. It will be a little over one turn.
It wasn't rollin' coal with a half turn, but had some light smoke. I still had 3 psi boost in high range full throttle full hydro pedal.
The nut that is on the left was locktighted. I could not move it, so I put a slim washer between them, I cut part of it out to get it on the shaft, then backed the inside nut against it. I will try it tomorrow to see how it works. It will be a little over one turn.
It wasn't rollin' coal with a half turn, but had some light smoke. I still had 3 psi boost in high range full throttle full hydro pedal.
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The reason I ask is I have the same engine and pump on a f935 mower. I turned the adjustment out and all it seemed to do is pour black smoke when it started to pull down. In fact it seemed to bog once the smoke started. I turned it back in some and it seemed to have more power without the excessive smoke and bogging. Seems to be a very fine adjustment. That adjustment is also spring loaded. There is a spring loaded pin inside that small screw with the 2 jam nuts.
moship
Veteran Member
Thanks for posting the video and the details of the installation along the way.
Did you do any before and after performance measures, such as time it takes to climb a hill?
What is the max boost set at? It looks like 5 psi on the video, but there is a bit of camera shake.
Did you do any before and after performance measures, such as time it takes to climb a hill?
What is the max boost set at? It looks like 5 psi on the video, but there is a bit of camera shake.