I'm helping someone that has a Ford 3000 gas tractor that hasn't been started in several years. I found that the carb wasn't getting fuel. Traced back to a corroded fuel pump and so I replaced it. But before installing new fuel pump, I noticed the fuel pump push rod wasn't moving freely in the engine block (goes up and down when engine cranked but sticks badly). I cleaned the pushrod and engine opening, and it now moves freely. However, after installing the new fuel pump with only the fuel line from the gas tank connected, cranking the engine, I don't see any fuel coming out of the pump. Is it possible that the pushrod is worn down and not pushing the fuel pump to it's min-max stroke. Does anyone know the proper length for the pushrod? Is there any other reason why the fuel pump wouldn't push fuel out even with fuel present at its supply side?
- Thread starter spetlak
- Start date
Ultradog MN
Well-known Member
- Location
- Twin Cities
Usually there is a small bolt on the top of
the pump. Remove the bolt and CAREFULLY
remove the cover so as not to ruin the
gasket/seal. Underneath is a screen.
It is probably clogged.
I have an NOS pushrod here and just measured
it.
It is 2.104" long.
Sean in PA
Well-known Member
Disconnect the fuel line at the shutoff valve and open the valve to see if any fuel is flowing there. If it has sat a while, there may be gunk in the tank clogging the screen on top of the shutoff valve. If you have good flow there, do the same at the other end of the line where it connects to the pump, as there could be something blocking the line itself.
Sean: The tank had been removed from the tractor and thoroughly cleaned, including the internal filter at shutoff valve. A new inline filter had been installed between the shutoff valve and the fuel pump. But I admit that the lines themselves had not been cleaned and so it's possible that some old gunk may still be present in the lines. I'll try and flush the lines leading up to the fuel pump, reconnect the line to the pump, and see what happens. I can only work on this on weekends and so I'll post what I find as soon as I can.
Sean in PA
Well-known Member
Why add an in-line filter when there was none originally? There should be 3 or 4 filters in that fuel system already, the first one is the screen above the shutoff valve inside the tank, the second one is the screen inside the fuel pump, the third one is inside the sediment bowl assembly and the fourth one, if yours has it, is inside the fitting where the line from the sediment bowl enters the carb. Lots of in-line filters are designed for gravity feed systems and do not work well in a system with a pump. If you insist on continuing to use an in-line filter, make sure it is the proper type.
Sean: Understood. The tractor had been owned and worked on by a previous owner. It has no sediment bowl assembly, and so the previous owner must have replaced it with an in-line filter (between tank and fuel pump). This tractor has a filter inside the fuel tank (at shutoff), then the in-line filter that I mentioned, then one inside the fuel pump, and finally one coming in at carb. I'll try to eliminate the in-line filter and eventually get a sediment bowl back into the system. By the way, do you know if the fuel pump pushrod rides directly on the eccentric inside the engine? In other words, if I remove the fuel pump, then pull out the pushrod from the engine, is there yet another part down in the pushrod shaft to be removed such as a spring? I was told that there is a spring down in there but that was from a questionable source and I don't want to spend time chasing this unless I know for sure.
Sean in PA
Well-known Member
I've never had my fuel pump out, but according to the parts site and service manual, there should be 2 springs and a seat. From the service manual, it looks like the springs and seat should be connected to the push rod by a circlip at the bottom end. Here's a link to the parts drawing, but it doesn't show the same order of assembly as the service manual. The service manual shows the circlip being at the bottom, below the seat:
Fuel pump parts drawing
If you're missing any of those parts, either of the springs, the seat and/or the circlip, then that may be why the pump's not working properly.
Fuel pump parts drawing
If you're missing any of those parts, either of the springs, the seat and/or the circlip, then that may be why the pump's not working properly.
I'm not talking about the pushrod that's inside and part of the fuel pump (I have a brand new fuel pump that isn't pumping fuel). I'm talking about the 2" pushrod that goes from the bottom of the fuel pump and into the engine. I'm asking if there are supposed to be other parts inside the engine between the pushrod and the eccentric (inside the shaft where the pushrod travels up and down).
Sean in PA
Well-known Member
I found the rod you're talking about in the drawing for the entire gasoline fuel system. Part labelled 22 in the drawing at the link below. The only thing it shows besides the rod under the fuel pump is the gasket, so I don't think there's any additional spring down in there.
Gasoline Fuel System
Similar threads
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.
Copyright © 1997-2024 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy