injector pump

[[email protected]]

2020 1955, have fuel to pump but cannot bleed, nothing comes out at injector.

 

[Jim.ME]

The 2020s I am thinking of were built 1965 to 1971, and I think yours is a 1966-1967 vintage from a previous post, if it is that same one.

Are you cranking the engine over with the lines loose at the injection nozzles? The primer pump can't bleed to the nozzles.

The rest of the story might shed some light as well. Was it running and you just changed the filter(s), or are you trying to start it after it has set an extended time?



This post was edited by Jim.ME on 09/26/2021 at 04:24 pm.

 

[Al Baker(pumpman)]

The 2020s I have been around had the CB (Charlie Brown) pump. If it is, and has sat any extended period of time the plungers are most likely stuck. If you have this pump dont fool to much with it, parts are very hard to find, and even more expensive. Get ahold of someone who has some experience with this style. They will be able to walk you through what can be done to make it run again. Some shops dont even want to fuss with them anymore. I still do about half a dozen each year. Al

 

[[email protected]]

Has been about six months since last ran. Replaced rear PTO seal and steering column seals. I have good fuel pressure to Injector
pump but cannot get fuel to injectors

 

[Jim.ME]

The hand throttle shuts the fuel off on yours, doesn't it? Have you moved the hand throttle to about 1/2 throttle position prior to cranking the engine over to bleed the injection lines?

 

[[email protected]]

yes moved hand throttle about half way and all way. I had a combine with same engine about 30 years ago. It stopped running in field
and I could not get fuel to injectors. I replaced valve under return line that had a spring and ball. That fixed it, but on the tractor
that part does not have spring and ball. It is open all the way.

 

[Al Baker(pumpman)]

6-8 months is very common for pumps to start getting sticky. I have at least one a week here on my bench. Kind of a new problem. Never saw it until they invented ultra low sulfur diesel. Then throw in some bio diesel and the problem just gets worse. Al

 

[fdt860]

If it just a stuck delivery valve, you may release it by moving throttle very quickly like if you hated it, from low to high idle.
Removing top cover should work also. No parts will fly if a db pump. Cav pumo.is more difficult to disassemble.
If piston are stuck, i have unstuck one pump by pulling tractor so engine runs full rpm. Centrifugal action unstuck the plungers.