Ford 7610 - No fuel at injectors

[Percy Veer]

I changed the fuel filter on my 7610. The engine started and ran briefly afterwards.

Fuel is getting to the lift pump and there is no air in the filter.

Looking at the shop manual, I have a Simms Injector Pump with a self-bleeding line and it says pump bleeding for this type is unnecessary.

The problem is that no fuel is getting to the injectors as I've loosened the unions at 3 of the injectors and cranked the engine over but nothing comes out.

I've googled online and searched the pump for a bleed screw to no avail.

Can anyone help?

Thanks

 

[2wheels]

always had to bleed the pump back in the day.

 

[bobk]

always had to bleed the pump back in the day.

Yes , crack a couple of injectors and get pumping

 

[Alchad]

OK - at the risk of stating the obvious - either the lift pump isn’t working, or you’ve got an air lock!

You said there’s no air at the filter, is that because you opened bleed screw at the filter and had fuel coming out when you operated the lift pump or turned the engine over? If you’re getting a good squirt of fuel out at the bleed screw on the filter then it has to be an air lock in the section from the filter to the injectors. First try cracking a joint on the injection pump and check for fuel there, then proceed to do the same at the injectors.

Not trying to teach grandma etc

 

[bobk]

OK - at the risk of stating the obvious - either the lift pump isn’t working, or you’ve got an air lock!

You said there’s no air at the filter, is that because you opened bleed screw at the filter and had fuel coming out when you operated the lift pump or turned the engine over? If you’re getting a good squirt of fuel out at the bleed screw on the filter then it has to be an air lock in the section from the filter to the injectors. First try cracking a joint on the injection pump and check for fuel there, then proceed to do the same at the injectors.

Not trying to teach grandma etc

Fastracs aren't easy machines to bleed , you're not supposed to pump it by turning the engine over

 

[agrimax]

Haven't seen a Simms or Minimec pump on a 7610 that hasn't got bleed screws yet. There should be a bolt head at each end but above the side cover plate that says Simms or Minimec (or even CAV) on it. Loosen one of them with a 1/2" AF socket or ring spanner and pump til fuel runs out clear and tighten. Then open an injector pipe and crank.

 

[bobk]

Fastracs aren't easy machines to bleed , you're not supposed to pump it by turning the engine over

Sorry wrong thread . oops

 

[forblue]

If your pump has a small black plastic pipe attached to a bleed screw then it is self bleeding, first ask yourself if it was running before you changed filter then it's you that has done something wrong, when filter was changed did you also fit the sealing rings that came with it of sling them in bin, if you fitted them did you remove the old ones first also when when moving lever on lift pump did it have some resistance to it if not crank engine slightly as pump maybe on cam if ok as stated crack off bleed screw on filter head 9/16 a/f and pump until fuel flows out.

 

[Percy Veer]

OK - at the risk of stating the obvious - either the lift pump isn’t working, or you’ve got an air lock!

You said there’s no air at the filter, is that because you opened bleed screw at the filter and had fuel coming out when you operated the lift pump or turned the engine over? If you’re getting a good squirt of fuel out at the bleed screw on the filter then it has to be an air lock in the section from the filter to the injectors. First try cracking a joint on the injection pump and check for fuel there, then proceed to do the same at the injectors.

Thanks

There is no air in the filter because when I loosen the bleed screw fuel runs out and when I operate the lift pump an extra squirt of fuel comes out there.

I agree there is an airlock. I just haven't managed to find the bleed screw(s) on the pump

 

[Netherfield]

A picture paints a thousand word.

 

[Netherfield]

Used Injection Pump fits Ford 5000 5600 5610 5900 6600 6610 6700 6710 7600 7610 7700 7710 E4NN9A543DA E4NN9A543DB E4NN9A543DC fits Simms P5498A

Injection Pump for Ford Tractor(s) 5000, 5600, 5610, 5900, 6600, 6610, 6700, 6710, 7600, 7610, 7700, 7710. Replaces Ford OEM Number(s) E4NN9A543DC, D9NN9A543GA, E4NN9A543DA, E4NN9A543DB, Replaces Simms Mfg Number(s) P5498A, P55982E.

www.tractorpartsasap.com

Does you pump look just like this?

 

[Percy Veer]

If your pump has a small black plastic pipe attached to a bleed screw then it is self bleeding, first ask yourself if it was running before you changed filter then it's you that has done something wrong, when filter was changed did you also fit the sealing rings that came with it of sling them in bin, if you fitted them did you remove the old ones first also when when moving lever on lift pump did it have some resistance to it if not crank engine slightly as pump maybe on cam if ok as stated crack off bleed screw on filter head 9/16 a/f and pump until fuel flows out

Thanks.

I changed the 2 large 'O' rings and removed the old ones first. It would have leaked with an extra 'O' ring in place

I shall look for the black plastic pipe.

There is resistance when I move the lever on the lift pump.

Fuel does flow from the bleed screw on the filter head when opened.

 

[Percy Veer]

It looks similar to the black and white photo.

Here's mine. It is difficult to photograph as the front-end-loader structure blocks access.

 

[5020man]

It looks similar to the black and white photo.

Here's mine. It is difficult to photograph as the front-end-loader structure blocks access.

Have you pushed the excess fuel buttn in ?.

 

[Percy Veer]

Have you pushed the excess fuel buttn in ?.

Where, what is that?

 

[forblue]

Excess fuel button will make no difference as it moves the rack and if there is air in system it's still no go, crack off a couple of injector pipes on the pump, you can also spray brake cleaner into air intake, NOT easy start and just a little will keep it running that will get rid of any air.

 

[Alchad]

OK, just for peace of mind….have you checked the fuel stop valve is in the correct position - ie open and not closed.

I had a situation on my old DB 1390 few years back where the cable/wire controlling the on/off lever on the injection pump had become loose, so when I pushed the knob in the cab thinking it was opening the valve the lever didn’t move….

 

[Percy Veer]

OK, just for peace of mind….have you checked the fuel stop valve is in the correct position - ie open and not closed.

Yes it is in the open position. Thanks

I've an engineer coming tomorrow as I've other things to do.

I'll post what the problem was and the remedy.

 

[forblue]

Did you ever state that it was ok before you touched it.

 

[Percy Veer]

Thanks everyone for trying to help.

Even though the manual says pump bleeding is unnecessary this is not the case as it does require it.

There is a bleed screw on the black plastic pipe on the pump. I had loosened it and tried to bleed it, but didn't seem to be getting anywhere.

The mechanic said the lift pump had seen better days and wasn't pumping as much as it should. That's my excuse.

It took about 5 minutes for him to start it up.

Thanks again