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I talked to a guy that did this, he said its the bolt by the throttle linkage, Turn that bolt out a few turns, that sounds right?
skidsteer.ca
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The bolt on the throttle screw would be you high and low rpm setting. Not the fuel adjustment. It would not change power only rpm.
Ken
I know what your thinking, but thats not it. It just to the side of the throttle rod. The bolt is maybe 1 1/2'' long, has a cap over it, but its not a solid cap, there are holes in it
The bolt under that cap i think they call "torque rise" If you change it too much you sill start blowing black smoke. This is factory set and really shouldn't be changed. I have never actually seen info on how to adjust this to factory spec, even with a repair manual.
I don't see how adjusting this could give you more power either, the more fuel you add the more power you generate (to a limit). Its not like a petrol engine, a diesel draws in a full air charge every time, the only difference is how much fuel is added. Thats all that bolt does, it touches the governor arm to adjust the fuel flow from the injector pump.
thetool
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The fuel is set at the factory for optimum performance from seal level to 5000'. When I worked at Bobcat, we could not pry off the caps or mess with them on a machine under warranty unless we had permission from the factory. We didn't have any trouble with engines unless we started seeing 8000' and up.
I don't believe you can get any more power unless you're working at altitude.
Turned the screw out around 1 1/2 - 2 turns it has a lot more power now
skidsteer.ca
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It might be prudent to pick up a pyrometer from someplace like genosgarage.com and install it to see what your exhaust gas temps EGT's are.
1300f is about the limit pre turbo (in the manifold) and about 1000 f downstream from the turbo for the Dodge cummins pickups.
Is there any smoke or does it burn relatively clean yet?
Ken
Yeah i'm not sure what a safe EGT is on the bobcat engine. I know on my truck i necer go over 1,300 pre turbo. Yes it does burn relatively clean, It only smoke if i rev it (smoke when it wasn't turned up) Or it will smoke a little if i'm really making it work. A guy figured it adds 20-25 hp
skidsteer.ca
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Increasing the fuel flow can make a tremendous difference in the power output. Thou at some point engine life can be greatly reduced. (especially if pistons get too hot)
A friend of mine run 5 740 JD skidders that were always underpowered with the 170 (my est) hp. They were running 6 hours long on a 200 litre (50 gal) tank. Being the warranty was long go the dealer turned them up to the point where they only an 5.25 to 5.5 hours on the same tank. After that I'd estimate them to have 225 hp as we had simular size machines with 225 and 250 hp engines and the 740 were right there. The one machine burned it fuel in about 5 hours and could be spotted easily by the dark black smoke that rolled out of it. It had in excess of 250 hp as it would climb hills in 8th gear on the road at speed our 250 hp machine would not think of. He later had that one turned back down, I am surprised it didn't burn a piston but it never seemed to hurt it.
