480C Construction King Loader Backhoe fuel issue

[meterwoman]

1972 480C Construction King Loader Backhoe

I need some advice please. My backhoe has a fuel issue that we can not figure out. Any help would be appreciated. When the problem started the backhoe would be running fine then it would cut off like it was out of fuel. It started out a once in a while thing, would cut off, wait a few minutes, it would crank up and run fine, then you could crank it, it would run for a minute then die.
We washed out the diesel tank, changed the filters, got new injectors, spent $1100.00 dollars getting pump rebuilt. Will only run on starter fluid now.now it will only run on starter fluid. We are so frustrated with this backhoe.

 

[used red MN]

No sir I don't know how to bleed lines

Hello meterwoman, welcome to YT! In this link look at pages 64-67, Manual that is out of a manual for a 530 but I am going to believe what you have is similar. That will be part of the bleed process. Depending on the type of injection pump you have it may have a bleeder that also needs bled. They are not showing that in the manual because the process they are covering is only for when the filters are being changed and not the pump. Does the pump have a tag does it say Roosamaster or CAV? Were steps taken to time the pump properly to the engine when it was removed and reinstalled? You will also have to bleed the injector lines themselves. This is done by loosening the lines at the injectors backing the nut off a half turn. Then crank the engine with the starter intermittently for 15 seconds then wait about 45 seconds to a minute between the next 15 second crank. If you don’t do this you will burn up your starter. When the lines start pulsing spirts of fuel then retighten the lines.
(To others, the reply quote is from an old post she had tacked a reply onto on the Case board. Jim.ME suggested she create her own thread which she did here)

 

[Jim.ME]

Hello meterwoman, welcome to YT! In this link look at pages 64-67, Manual that is out of a manual for a 530 but I am going to believe what you have is similar. That will be part of the bleed process. Depending on the type of injection pump you have it may have a bleeder that also needs bled. They are not showing that in the manual because the process they are covering is only for when the filters are being changed and not the pump. Does the pump have a tag does it say Roosamaster or CAV? Were steps taken to time the pump properly to the engine when it was removed and reinstalled? You will also have to bleed the injector lines themselves. This is done by loosening the lines at the injectors backing the nut off a half turn. Then crank the engine with the starter intermittently for 15 seconds then wait about 45 seconds to a minute between the next 15 second crank. If you don’t do this you will burn up your starter. When the lines start pulsing spirts of fuel then retighten the lines.
(To others, the reply quote is from an old post she had tacked a reply onto on the Case board. Jim.ME suggested she create her own thread which she did here)

I hadn't seen this and gave here info on that post she tagged onto on the Case Forum.

 

[meterwoman]

I look at it. I am sorry I posted it in the wrong place.

 

[used red MN]

First question that really needs addressed is about the timing of the pump. That means it has to be in time or correct point of rotation by its drive gear with the pistons and valves to make it work properly. I should probably read the service manual to see what the timing process is on that particular engine/pump set up. In some cases there is just a key slot in the gear when you pull the shaft out it can really only go back in one way. In some cases it case be installed a half a turn off in a “tanged” drive like inserting a flat screwdriver into a screw slot. In other configurations you have a couple dozen gear teeth around a gear and it can easily be placed in the wrong position in that setup.
No real problem posting here, just kind of a “pet peeve” of some of us that have been here a while when a post on the same subject gets replies spread onto a couple different forums. I am curious what lead you to post in the Tractor and Farm Talk section as opposed to the Case and David forum. I did look for the first time I see when you click the Post Thread button on the home page it takes you to the “Forum” list and T&F Talk is the one at the top. I suspect that is why you chose it.

 

[meterwoman]

I am sorry sir that I posted on the wrong forum for the second time. I guess I posted it here because we use it around the farm. We have the "tanged" drive. Since reading all the post my boyfriend and I are learning a lot as we go along. We actually have a parts book and a manual book for the backhoe.
I do apologize for posting in the wrong forum again. I was in our shop it was 95 degrees today and sweat was running in my eyes in humid NC (45 minutes from Pinehurst).

 

[used red MN]

There is absolutely no need to apologize about where you posted. We have made it through far worse things than this on these forums. The main thing is that you obtain helpful information to get your machine back in operation.

 

[caterpillar guy]

Ok did this problem arise before or after the pump work and tank cleaning. I'm out on a limb here guessing it has come about since the pump was off for work. If so which it sort of sounds like the problem was before the pump was off. Since you cleaned the tank. Did you also blow out the lines to make sure they are clear so fuel can flow freely through them? I don't remember if that model is a gravity fed or has a lift pump if gravity forget about the lift pump. Bleed the lines from tank to filters then to the pump. You could put a rag around an air hose to put a bit of pressure on the fuel at the tank to help persuade it to flow a bit faster if it already is flowing though usually not needed. Once you have accomplished the bleeding it should start right up. I'm going to guess possibly the pump is out of time either by the pump drive , drive gear or timing marks. I would doubt the shop would have sent it out out of time from their stand point . Though mistakes do happen. if there is a lift pump does it have a jack pum/hand pump on it so you could pump it up by hand to bleed it. I don't believe those did.

 

[meterwoman]

Ok did this problem arise before or after the pump work and tank cleaning. I'm out on a limb here guessing it has come about since the pump was off for work. If so which it sort of sounds like the problem was before the pump was off. Since you cleaned the tank. Did you also blow out the lines to make sure they are clear so fuel can flow freely through them? I don't remember if that model is a gravity fed or has a lift pump if gravity forget about the lift pump. Bleed the lines from tank to filters then to the pump. You could put a rag around an air hose to put a bit of pressure on the fuel at the tank to help persuade it to flow a bit faster if it already is flowing though usually not needed. Once you have accomplished the bleeding it should start right up. I'm going to guess possibly the pump is out of time either by the pump drive , drive gear or timing marks. I would doubt the shop would have sent it out out of time from their stand point . Though mistakes do happen. if there is a lift pump does it have a jack pum/hand pump on it so you could pump it up by hand to bleed it. I don't believe those did.

The problem started gradually. For example we took it down the highway to do some work when in high gear with fuel wide open it would die like it was out of fuel, but would have plenty of fuel. We would let it roll off the highway, sit for 5 minutes, it would crank right up and take off again, drive it down the road 1/4 of a mile then it would repeat the same thing. We started to investigate the problem then it started to start right up then die after a minute. We flushed the tank, lines, and changed the filters. Nothing helped. We took the fuel pump off and had it rebuilt, bought new injectors. Yesterday we checked the timing but we have not took the valve cover off yet to check the TDC.
Thank you all for your help.

 

[meterwoman]

The problem started gradually. For example we took it down the highway to do some work when in high gear with fuel wide open it would die like it was out of fuel, but would have plenty of fuel. We would let it roll off the highway, sit for 5 minutes, it would crank right up and take off again, drive it down the road 1/4 of a mile then it would repeat the same thing. We started to investigate the problem then it started to start right up then die after a minute. We flushed the tank, lines, and changed the filters. Nothing helped. We took the fuel pump off and had it rebuilt, bought new injectors. Yesterday we checked the timing but we have not took the valve cover off yet to check the TDC.
Thank you all for your help.

Also I was wrong about model. It's a 1976 Case 480C