4720H not starting

[rasorbackq]

Morning Guys and Gals. Was doing some back hoe work in the field yesterday. Very low on fuel. Needed to move tractor back to barn to move food for animals this morning.
Started it up drove the km back to barn. Moved a couple bins around . Shifted from 1st to second and the tractor died. Was sitting on a little angle to the right side . Thought I may be sucking air from tank. Dumped in 5 gallons of fuel Just cranks over and over and over. Dropped the white fuel bowl full of fuel. Filter looks clean . Did find a washer type disk on top of the filter . Not sure whys it was there?
Dumped the fuel out reattached the bowl and still didn't start. Dropped bowl again. Full of fuel. On the fuel bowl area there is a looks like a fuel shut off. Where should the lever be? When I found it it was down.
What do I do Next??

 

[rasorbackq]

Found my owners manual. . Says to move the lever up throttle on full and crank for 10 secs. Still no luck.
My neighbor says it could be air locked from bowl to motor.
Not sure how to remove air from the injectors. Pouring outside my so not happening now.

 

[LouNY]

Crack loose the nuts on the line and crank till air is gone and fuel squirts out.
There may also be a bleeder on the fuel injection pump.
Does your tractor gravity flow to the injection pump,
or do you have a primer pump (hand) inline.

 

[Roadworthy]

Your owner's manual should give instructions how to bleed air from the system and where the bleed points are located. Many small tractors are gravity fed to the fuel pump and will not suck fuel on their own. They can't pull the air out to put it through the injectors.

 

[rasorbackq]

So the dealer wasn't sure which way the valve should be to run . After removing the fuel line from filter it needs to be down to run. . Now I have a fuel leak at the clamp. Need to buy a new clamp tomorrow.
Here is the write up from book.

 

[rasorbackq]

Crack loose the nuts on the line and crank till air is gone and fuel squirts out.
There may also be a bleeder on the fuel injection pump.
Does your tractor gravity flow to the injection pump,
or do you have a primer pump (hand) inline.

It must pump to the filter as I had the filter off and fuel didn't run all over the place. Didn't see a primer

 

[Cougsfan]

I have a 4720CH which has a smaller 9 gallon fuel tank than the 4720, and it sometimes runs out of fuel on a side hill when there is still 3 or 4 gallons of fuel in the tank. (it only does this when I am as far away as can be from the shop where I keep my fuel.) I have also just flat ran it out of fuel a couple of times. Anyhow, mine always re-primes itself when I dump fuel in the tank and starts right up after cranking it about 10 seconds, so I am not sure what to tell you what is different between your tractor and mine. But I'd follow Lou's suggestion for bleeding the injectors. I have to do that on my old Ferguson when it runs out of diesel. Another thing that works well on the Ferguson is to tow it to start it after it runs out of fuel. Sometimes that is easier than re-priming.

 

[rasorbackq]

Crack loose the nuts on the line and crank till air is gone and fuel squirts out.
There may also be a bleeder on the fuel injection pump.
Does your tractor gravity flow to the injection pump,
or do you have a primer pump (hand) inline.

Dealer told me not to open the fuel lines at the injectors as that works on older tractor but is not required on these new tractors. Before I was told that I craCKED THEM OPEN BUT NO FUEL was sent to the injectors.

 

[rasorbackq]

I have a 4720CH which has a smaller 9 gallon fuel tank than the 4720, and it sometimes runs out of fuel on a side hill when there is still 3 or 4 gallons of fuel in the tank. (it only does this when I am as far away as can be from the shop where I keep my fuel.) I have also just flat ran it out of fuel a couple of times. Anyhow, mine always re-primes itself when I dump fuel in the tank and starts right up after cranking it about 10 seconds, so I am not sure what to tell you what is different between your tractor and mine. But I'd follow Lou's suggestion for bleeding the injectors. I have to do that on my old Ferguson when it runs out of diesel. Another thing that works well on the Ferguson is to tow it to start it after it runs out of fuel. Sometimes that is easier than re-priming.

I did the same thing before in a ditch with low fuel. Just topped it up and off I went.

 

[LouNY]

From the service manual;

Air bleeding: The fuel system runs from the fuel
tank through the fuel filter, fuel injection pump
and high pressure piping, to the injector. Fuel
is not injected if there is air in the fuel system.
Bleed the air according to the following steps.
1) Loosen the air bleeding screw at top of the fuel
filter until foamy. And then put the clothes near
the air bleeding screw for prevent overflow fuel.
2) If fuel doesn’t include bubbles, tighten the air
bleeding screw.

When you loosen the bleed screw on top of the fuel filter do you get fuel flow from it?
Attached is a section of the 20 series manual, it talks about the procedure to bleed the system under various conditions.