IH 785XL Bosch pump

[ed574]

I'm looking for a bit more grunt from my 785. Nothing too over the top, just enough so it hangs on a bit better with a load on the back. I've heard that you can alter the fuel screw on the pump for more power, but looking around the internet I can only find information for the Bosch VE pumps, whereas mine is a VA. Our 4230 has a VE pump and I can see the fuel screw quite easily on it but on my 785 I can't work out where it is. Is it internal or behind a plate or does it need to be taken off and sent to a specialist?

 

[Lofty]

I'm in no way advocating tweeking the pump but I can tell you that the max fuel screw is the screw the stop lever sits against in the run position (forward). This screw should have a lead seal on it. If not its already been opened up.

 

[Lofty]

I'll just add that you should make sure that the stop lever is actually on its stop when the button in the cab is pushed in as a poorly adjusted stop cable can prevent this and hence reduce the power.

 

[ed574]

Thanks, I'll have a look in the morning and see what's what and check the stop cable's adjusted.

 

[ed574]

Well you were right, the stopper lever was slightly off, only by 4mm or so but enough to make a noticeable difference. Also given it a small turn on the adjuster just for good luck and it seems to be a lot better now. Not that I can test it much in this horrendous weather. Anyway thanks for the help.

 

[Lofty]

Glad you got sorted. I'd have thought 4mm would make a vast amount of difference. I've known 1mm make the difference between one gear and the next one up ploughing with a 1056.