SE MT | dmax2001 - 3/10/2017 19:54
I hear a lot about adjusting the aneroid on 30 series fuel pumps to give them more low end grunt. What needs to be done and are there drawbacks.
On the later 30 series pumps that had a vacuum aneroid on them you can thread out the hex head plug on the back of the aneroid (rear of the pump) and look inside the hole. you'll see a star wheel that you need to turn down with a flat screwdriver (clockwise as I remember). It'll take a couple turns at least. if you go too far, it'll just smoke more. I found a happy medium where it smokes lightly on the low end, but as rpms pickup to around 1400 it really livens up and gets full fuel.
I talked with a highly recommended diesel shop that I buy pump parts through down in North Platte about this, and he actually recommended removing the aneroid off the top of the pump, then removing the rod between it and the rack, and re-installing the aneroid. this will delete it completely. I tried this, and it REALLY rolls the coal at any rpm. He told me he had no concerns about it sooting up the rings at all and has done this on many pumps. It was a little too much smoke for me, so I put the rod back in and adjusted the aneroid down to where I felt comfortable I was getting maximum low end power without clouds of smoke.
I know some of the earlier 30 series had mechanical air fuel ratio controls on them and I have no idea on how to adjust them. |
Deere aneroid
