Fordson Major Fuel Leak

DylanP95

Member
I have a 1954 Fordson Major which is leaking fuel. Appears to be around the injection pump. I am fairly certain it is also mixing with the oil. My oil pressure dropped down to 20 today while bush hogging. Checked the oil and it is slightly over full but also very thin. Fuel was also spraying out around the injection pump. It looked dirty, almost oily. Any help would be appreciated. I'm not sure where to start looking
 
If someone can tell how to get the site to quit blocking my pictures as spam, I'll upload some of the leak
 
You have to have a set number of posts before you can post pictures. Try going to the
site Feedback forum and asking Chris or Kim if they will unblock you.

There is no way that a leaking injection pump can put diesel in the sump, The pump has
no connection to the sump. What could happen however is the lift pump diaphragm can
fail and diesel will enter that way. Another possible cause is the leak off pipe from
the injectors under the valve cover, sometimes the soldered joints fail with old age.

On a 1954 Major an oil pressure of 20 psi when hot is pretty good, what oil are you
using? Should be 30W or 29/30W diesel engine oil.
 

I am running 15w-40. I used to have 40 on the pressure gauge. would a bad diaphragm cause fuel to leak out around the injection pump?
 

cvphoto52826.jpg

Here's a picture of the leaking area
 
If you have diesel getting into the oil from the lift pump it could be thinning down
the oil and causing the injection pump auxiliary drive shaft seal to leak.

In my experience 15/40W oil contains additives which affect the gaskets and seals in
these older engines, not saying that it is a bad or poor quality oil just that it
can give problems of gasket and seal leakage in some of these older engines.

It looks like some of your problems are due to leaks on the front plate gasket. this
could also be caused by retaining bolts coming loose. On your age of tractor there
were no dowels to locate the front plate to the block so movement was a common
problem back in the day.
 
Thank you! I will look into that and swap the oil out for SAE30. And check that front plate. I will probably end up torquing all the bolts just to make sure none are coming loose. I also have a question about batteries. This tractor came to me with 2 batteries ran parallel. Being that the compartment is tiny, they are 2 small car batteries. I live in South Central Indiana. And it will not crank in the winter time. I think the batteries are the culprit
 
The bolts you need to tighten are not easy to get to as they are inside the timing
cover and behind some of the timing gears. I did a repair guide some many years ago for
another site I was involved with and will see if i can get some of the pictures from
that.

Battery-wise you need at least 120 ah capacity battery. I have the Fordson battery
specs but cannot lay my hands on them at the moment.
 
Hey MajorMan, I changed the crappy battery setup, replaced connections, starter solenoid, did SAE30 oil change, and it's running like a champ. Im not sure if there is actually a diesel leak. Might have just been thinned out motor oil. But the injector pump auxiliary shaft does seem to drip some oil out of it.
Did some bush hogging got her hot and under a load the oil pressure was 35-40PSI. At idle it was 15-20PSI. Are those decent numbers? I am fairly new to this tractor. I've had it for 4 years but never missed with it a whole lot. Trying to get it running like it should.
 
(quoted from post at 16:59:03 08/08/20) I have a 1954 Fordson Major which is leaking fuel. Appears to be around the injection pump. I am fairly certain it is also mixing with the oil. My oil pressure dropped down to 20 today while bush hogging. Checked the oil and it is slightly over full but also very thin. Fuel was also spraying out around the injection pump. It looked dirty, almost oily. Any help would be appreciated. I'm not sure where to start looking

If your injectors are located under the valve cover, the return lines could leak into the crankcase. For that matter, so could the high pressure line connection.

It seems to me that there was an old Ford tractor of that vintage that did have the nozzles under the valve cover.
 

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