-
Posts
4,109 -
Joined
-
Last visited
-
Days Won
3
Hot Plug's Achievements
Advanced Member (3/3)
928
Reputation
-
Hello,
You helped me with my SMD pump settings many years back. Are you still active on here? I'd love to ask you a question if possible.
Thanks,
Dan
- Show previous comments 1 more
-
-
Hello,
Sorry for the delay, I was out of town for work. I have a question regarding the plunger and low end fueling on my SMD. I do know that the lack of low end fueling is inherent to these cast iron pumps. That said, I was told my an old(now deceased) IH pump guy that to get the best low end fueling, it is important to have 1/8" between off and low idle. I'm assuming he is talking about getting the rack adjusted to the sweet spot in the plunger. I have several pump manuals and they all state to run the tractor on gas, turn the injection pump to off and adjust the rack until the fuel just starts injecting out of a spare injector and then back the rack off 1.5 turns to set the proper positive fuel shutoff. With that said, I do not have a spare injector so I started turning the rack in 1 flat at a time looking for just the slightest bit of white diesel smoke while running on gas and having the pump throttle set at low rpm. This definitely seemed to help my low rpm governor action after just the first flat or two adjustment. I ended up turning the rack in a total of 7.5 flats or about 1.25 turns and thought everything would be good to go. I ran the tractor a couple of hours and towards the end of my test run, I did a wide open run up a hill in 5th and it acted like it couldnt fuel enough and started to die, so I backed the rpm down a few hundred and it pulled the hill ok. I'm now thinking the plunger must have a window of fuel delivery and while I advanced it to fuel sooner at low rpm, I must have advanced it too far because the top end seemed to really its ability to fuel.
Now, I suppose it could be filters and I did not see the fuel pressure gauge while this happened, but it has new filters in it and this happened just after adjusting the rack, so I'm thinking I need to find a happy medium. I feel like a spare injector would be best to set it per the book, but I cant find anything reasonably priced, so I guess I'll just have to play with it.
Do you have any tips for my issue?
Thanks,
Dan
-
Well Dan , you've got all the right info there as far as I can tell .I unfortunately did all my pump work by trial and error .... the biggest bonus that helped me was when I changed the fuel plunger in my pump . I put a plunger out of a TD 14 pump into my SWD9 so I went from fueling 350 inches to haveing fuel available from 461 inches ..... WOW ! So the only thing one has to becarefull of it over HEATING!!!! You have to be carefull the BIG problem is the head design isn't good when you over fuel ...... 3 valve head ...... sounds like you've just adjusted a bit out of range ....
Regards HP
