Diesel fuel pump

[Bob NY]

Is this fuel pump strictly for bleeding the system, or does it also push fuel to the injector pump when the engine is running? This one leaks really bad when I pump it. Will a leaky pump allow air into the system? I haven't found any exact replacements online. Can it be rebuilt?
Thank you.

 

[farmersamm]

I have the same setup on an Allis 190XT. It's for priming the system if you have to drain the lines. Mine started to leak, so I simply plumbed around it. Never saw one that worked anyways.

About the best way to prime a system is to crack a line, and gently GENTLY pressurize the tank. I use a cutout piece of an inner tube with the shrader valve intact. Hold it over the tank opening, and give it a tiny bit of air. Try not to exceed around 5psi. (You can also use a rag, and an air gun, to do the same thing..........the rag is actually a good safety valve)

Whatever you do, don't use ether to run the motor to draw fuel. Ether kills engines.

 

[Dieseltech]

Is this fuel pump strictly for bleeding the system, or does it also push fuel to the injector pump when the engine is running? This one leaks really bad when I pump it. Will a leaky pump allow air into the system? I haven't found any exact replacements online. Can it be rebuilt?
Thank you.View attachment 92761

You can remove it, Stanadyne/Roosa pumps don't need that hand primer and most later models never had it anymore. A FULL fuel tank will help with bleeding.

 

[Bob NY]

Thank you for the replies.

 

[random_farmhick]

I have the same setup on an Allis 190XT. It's for priming the system if you have to drain the lines. Mine started to leak, so I simply plumbed around it. Never saw one that worked anyways.

About the best way to prime a system is to crack a line, and gently GENTLY pressurize the tank. I use a cutout piece of an inner tube with the shrader valve intact. Hold it over the tank opening, and give it a tiny bit of air. Try not to exceed around 5psi. (You can also use a rag, and an air gun, to do the same thing..........the rag is actually a good safety valve)

Whatever you do, don't use ether to run the motor to draw fuel. Ether kills engines.

I replaced the guts of the pump on my 2-135 twice, and each time it lasted about 5 years. Well I went and got an electric lift pump from such as a 9500 deere combine(used from a 3300-9610 at least), and plumbed it up and it works great. Your last comment i'll both agree and disagree, Ether doesn't necessarily kill engines, but improper use will kill one, and using ether to "run" an engine while you are trying to get it primed up can kill them. Although, with that being said, some Deere tractors actually tell you in the book to use ether while cranking to help prime the system when changing filters, and I've never heard of those models having issues with ether.

 

[farmersamm]

I replaced the guts of the pump on my 2-135 twice, and each time it lasted about 5 years. Well I went and got an electric lift pump from such as a 9500 deere combine(used from a 3300-9610 at least), and plumbed it up and it works great. Your last comment i'll both agree and disagree, Ether doesn't necessarily kill engines, but improper use will kill one, and using ether to "run" an engine while you are trying to get it primed up can kill them. Although, with that being said, some Deere tractors actually tell you in the book to use ether while cranking to help prime the system when changing filters, and I've never heard of those models having issues with ether.

I borrow this guy from time to time. Had to use it to get this yr's hay off the field.

Nicest little tractor I've ever run. 5425. I did the service on it a couple years back as a return favor for borrowing it at that time. I remember having some difficulty priming the fuel system after changing the filter, but I can't remember how I got it to run. I'm pretty sure the pressurizing trick didn't work. Seems it was a matter of cranking it over for extended periods. I'm pretty sure I'd never use ether on a guy's tractor that wasn't mine. It's a matter of trust when someone lets you use an expensive piece of equipment. Same when working on it.

I think these have a lift pump? The tank is low on the frame, so they must have one. I do remember cracking a line IIRC. I'm thinking that just repeatedly energizing the pump finally pulled the fuel up to where it belonged. It's been years.

IIRC that it's a 90's model. I remember ordering the left side cab door glass for it at the time I serviced it. (One of his guys left it open, and hooked a corral gate post). I'm sure they've changed over the years. I about died when I got the price on the glass. I wouldn't be sure if the fuel system changed over the years. (The glass is made in Sweden IIRC).