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Showing results for tags 'fuel pump'.
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Hi All, hopefully this post is in the right forum - engines or general IH tech? I have a '71 444 tractor, and have been having a heck of a time with the float needle sticking and flooding. If I can get to it in time when it starts to sputter, I can rap on the float bowl with a wrench and it will sort itself out. But too often, it will die before I can do that and then it's a bear to get started again. I have installed an electronic ignition to replace the points since they seemed to get burned easily when trying to start it when it's flooded. Two years ago I rebuilt the carb, and it worked great for a few months after that. All I can think of is that some kind of grit is getting into the carb and causing the needle valve to stick open. For its age, it wouldn't be surprising if the tank has some rust. Haven't really been able to tell very well by looking inside, I probably need to drain it to get a better look. Anyway, I don't know how effective the sediment bowl is. I've thought about adding an automotive type fuel filter, but was advised that this might lead to other problems because the filter is too restrictive. However, I noticed that my shop manual shows a fuel pump on this tractor. Mine doesn't have one. When or where it would have been removed I have no idea. If I replaced the pump, would I be able to put a better filter on - downstream of the pump - without worrying about fuel starvation? Does it sound like that would help the situation? Or is the only remedy cleaning out the fuel tank and the whole fuel system to make sure there's no dirt or rust? And if a pump is worth trying, would I be okay just getting an aftermarket electric fuel pump that's rated for the right pressure output? And what is that? I guess I'd never thought about it back when I had cars with carburetors, but what keeps the fuel pump from overwhelming the float valve and just pushing fuel in and flooding it? (Motorcycles are easier - gravity-fed and no pump). Is it just matching the right pump pressure to the carb/float valve? Thanks for any help. It's warming up here in Minnesota, and it'll soon be time to that that tractor working again!
I'm in need of some help. I have a 1966 706D that's giving me some issues. It first would having issues with power slightly going up and down when just idling and even worse when I am driving and hitting bumps. That has me to think the governor is going bad. Then the engine just shut down. I had something clogging the line and blew it open with an air hose back to the tank. The fuel then ran great through the line. Pulled the tractor with another to get it started again. It ran great but wanted to check the tank. I then drained the tank completely and also changed the fuel filters. Checked the tank and there was nothing in there as it must have washed out when I drained all the fuel. Got everything put back together and again pulled it to bleed the system and the tractor fired right up. It was still doing the same surging issue as before as I did not do anything with the governor. I was doing some simple mowing with it that our other 706D has no issue with and after a while this one just starts to bog down. If I pushed the clutch in it would idle back up. This happened a couple of times until it just died and now will not start. Doesn't even smoke when cranking like I am not getting fuel to the system. Questions I have: is the pump bad as well? Is the governor bad or could it just be the pump? Are the injectors bad? Is there something I am missing? Any help would be greatly appreciated.