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1950T main screw

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gaetan

12-02-2002 18:28:17




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my 1950T as rossa fuel injection pump were is the
main fuel delivery adjustment screw the cover
on top of my pump has only 3 screw i took that off
and look down there never saw the alen screw to adjust fuel delivery. WFE explain to me how to do it but his fuel pump
had 4 screw holding the top cover maybe it is
not the same pump can anyone help thank you




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John

12-04-2002 17:08:06




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 Re: 1950T main screw in reply to gaetan, 12-02-2002 18:28:17  
Hi:

You take that cover off and you see the shaft. The engine has to be rotated to see it, it's very small(5/32" allen head wrench) and then turn it in, clockwise. On my 4020, it only went in 1/4 of a turn and it didn't even help it any. That's where it is.



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WFE

12-04-2002 17:25:21




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 Re: Re: 1950T main screw in reply to John, 12-04-2002 17:08:06  
Try putting a turbo on that 4020 like the 1950-T has. My Deere comrades say that the 4020 needs more air if you give it more fuel; otherwise, all you get is more smoke and no hp. The 1950-T has a turbo so the extra fuel is accompanied by more air for more power and not a great deal of extra smoke.



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John

12-05-2002 04:07:16




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 Re: Re: Re: 1950T main screw in reply to WFE, 12-04-2002 17:25:21  
Huh...I've considered the art of turbocharging but haven't been at complete sense of mind thinking of M&W kits because you have to cut holes in the hood for some and it's not original equipment. Do you know what I mean? I'd hate to detract the value of this beauty by what I install on it. Anyway. I have the pump with the 115 horse leaf spring and the torque screw, three turns out it STILL doesn't smoke nearly at all, a little pulling in the 10,000# class in 4th gear. I have the good (Dry-type) air filter with pre cleaner and it just keeps running and running. I think that it's using that fuel efficiently, the only other thing I know to do is to install a pyrometer and see how hot she gets. Thanks for the suggestions.
JOhn

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WFE

12-05-2002 16:12:15




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 Re: Re: Re: Re: 1950T main screw in reply to John , 12-05-2002 04:07:16  
Know exactly what you mean. Wouldn't start cutting and torching the hood on my Ollies either. I pull against a strong JD 4000 in a 12,500 lb class which is turbocharged and does smoke. I suspect the pump has been more than simply tweaked. Still, my honorable 310 turbo hangs in there and we have great fun competing and he cannot believe I can do what I do with so little motor. I wonder... If your pump is the same as what we use on the 310s (Roosa Master rotary style), when we turn the torque screw out too much, horsepower actually decreases at the expense of a torque curve increase. Have played with my torque screw and the motor just doesn't give up at lower rpms, but with the 310, you want it to maintain hp and rpms so I turned torque screw back in to keep my rpms at about 2700 for rated hp. Sure is fun to play though.

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WFE

12-02-2002 20:44:19




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 Re: 1950T main screw in reply to gaetan, 12-02-2002 18:28:17  
If the pump is still on the tractor, you won't be able to see the screw, but it is down there. If you ask nicely, maybe the wife or someone with dainty and dexterious fingers can feel it. They didn't make it easy to find, probably for a reason. Good hunting! The cap probably does have 3 screws; been a year or so since I've been inside one. Good luck.



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Wrenchbender

12-02-2002 18:39:17




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 Re: 1950T main screw in reply to gaetan, 12-02-2002 18:28:17  

I think you may have to turn the engine to line up the allen screw. It seems like it may even take one that has a bend in it to get past the throttle shaft. Don't take that as Gospel, it's been awhile since I've done one. WB.



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gaetan

12-03-2002 13:14:12




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 Re: Re: 1950T main screw in reply to Wrenchbender, 12-02-2002 18:39:17  
I have another pump that i look in and never
saw that screw but i will look again with
glasses thank you again boys for your time i will find it



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gaetan

12-03-2002 13:14:17




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 Re: Re: 1950T main screw in reply to Wrenchbender, 12-02-2002 18:39:17  
I have another pump that i look in and never
saw that screw but i will look again with
glasses thank you again boys for your time i will find it



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m kuhns

12-03-2002 13:52:22




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 Re: Re: Re: 1950T main screw in reply to gaetan, 12-03-2002 13:14:17  
You will have to turn the engine over to see the leaf adj. screw. Have someone turn it over while watching. The screw is locasted inside the pump just about 1/4 inch behind in refrence to the timing window. Some newer pumps have a slight V in the back of the timing window, which is just enough room to stick in an allen wrench to turn the srew in or clockwise. I wouldn't go more than an 1/8 ot 1/4 of a turn. THe screw is highly sensitive. If you need a picture or two email me. I should be able to dig up something with a picture or two.

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