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Old style 4000, 4 cylinder diesel - injection leak off


 
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Tom in TN
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PostPosted: Thu Feb 08, 2018 2:43 pm    Post subject: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote

I have an old style Ford 4000, 4 cylinder, diesel tractor. I was getting fuel oil into the engine crankcase oil, so, based on advice from guys on this forum, I decided to replace the seals on the injector pump drive shaft. I removed the timing inspection cover from the side of the pump and a very large volume of fuel poured out of side of the pump. I had turned off the fuel shutoff valve at the tank, but way too much fuel came out of the timing inspection cover area.

I broke into the fuel line from the tank to the filter and no fuel was coming out of the line so I know that the shutoff valve on the tank is working. I then removed the injection leak off line that goes from the pump up the tank. Lots of fuel came out. I ended up draining the whole fuel tank out through the injection leak off line.

I don't know anything about the fuel tank stand pipe, but it seems like it must be broken, thus allowing fuel to flow freely out of the tank.

What do you think? Is this something I need to fix? The stand pipe is no longer available from New Holland, but I haven't checked any of the after market places.

Any advice would be greatly appreciated.

Tom in TN
 
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showcrop
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PostPosted: Thu Feb 08, 2018 3:13 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote


Yes, that is it. The standpipe is maybe four inches Long. I had the same thing going on. I drained the tank down and removed the valve and fitting. The standpipe was not broken but it had come unsoldered and was wobbling around in there making the gap bigger and bigger. To repair it I drilled the fitting out large enough for the tubing to slip all the way through, then mixed and applied a little epoxy to glue the standpipe to the fitting. I have put some 25 hours on the tractor since then.
 
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showcrop
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PostPosted: Thu Feb 08, 2018 3:14 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote


Yes, that is it. The standpipe is maybe four inches Long. I had the same thing going on. I drained the tank down and removed the valve and fitting. The standpipe was not broken but it had come unsoldered and was wobbling around in there making the gap bigger and bigger. To repair it I drilled the fitting out large enough for the tubing to slip all the way through, then mixed and applied a little epoxy to glue the standpipe to the fitting. I have put some 25 hours on the tractor since then.
 
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stevob671
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PostPosted: Thu Feb 08, 2018 3:19 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote

The standpipe is ported two ways, the tall pipe part is ported to the injectors and the "short" portion is the line to the pump. This line ports near the bottom of the tank while the standpipe from the injectors should be above the normal fuel level. The line to the pump will pretty much drain the tank if hose is pulled at the pump. (At least that's how it's plumbed on our 961)
 
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TinCan
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PostPosted: Thu Feb 08, 2018 4:16 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote

CVPost-Tom in TN wrote:
(quoted from post at 15:43:23 02/08/1Cool I removed the timing inspection cover from the side of the pump and a very large volume of fuel poured out of side of the pump.


Question. When I removed the timing cover on my pump a bunch of fuel ran out. It had sat for 15 yrs before I got it, and I don't remember if the fuel was shut off. Is it normal for fuel to run out, and if so, how much?

Sorry for the Question on your thread.

Thanks, Pat
 
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Tom in TN
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PostPosted: Thu Feb 08, 2018 5:23 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote

Pat,

Your question is part of my dilemma. It was my understanding that with the fuel valve on the tank turned off, when the timing cover is removed, less than a gallon of fuel should run out. The filter will partially drain and the fuel in the injector pump will drain, but it was my understanding that amount is all that should drain out. For whatever reason, multiple gallons came out of my pump. That's when I disconnected the injector leak off line from the pump and ended up draining the whole tank of fuel into a couple of gas cans.

I don't think that is normal, but I'm not sure at this point.

Tom in TN
 
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TinCan
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PostPosted: Thu Feb 08, 2018 5:43 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote


When I got around to removing the cover on mine, I had already removed the tank, which I don't believe the fuel valve was ever turned off, and still had 15-yr old fuel in. I had removed everything before removing the cover. I had the head off the engine, I had all the fuel lines off the pump. I only remove the cover to check the timing, before I removed the pump, so that I could clean the engine to paint it. This is my first diesel to work on, and I did not expect fuel to run out of the timing cover at all.

Thanks, Pat
 
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Destroked 450
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PostPosted: Thu Feb 08, 2018 8:12 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote


Even with the fuel lines and return lines disconnected when you remove the timing cover from the pump it will still empty out the fuel in the pumps cavity.
I always drain the tank before working on the fuel system on these tractors.
 
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riveroadrat
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PostPosted: Thu Feb 08, 2018 8:43 pm    Post subject: Re: Old style 4000, 4 cylinder diesel - injection leak off Reply to specific post Reply with quote

CVPost-Tom in TN wrote:
(quoted from post at 02:23:52 02/09/1Cool Pat,

Your question is part of my dilemma. It was my understanding that with the fuel valve on the tank turned off, when the timing cover is removed, less than a gallon of fuel should run out. The filter will partially drain and the fuel in the injector pump will drain, but it was my understanding that amount is all that should drain out. For whatever reason, multiple gallons came out of my pump. That's when I disconnected the injector leak off line from the pump and ended up draining the whole tank of fuel into a couple of gas cans.

I don't think that is normal, but I'm not sure at this point. The return line from the pump will drain the fuel if you open the window. The stand pipe should be fixed, i think it may have something to do with the way the injectors return the fuel.

Tom in TN

 
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