Lincoln Welder - a little help needed

Gecko

Gecko

Well-known member
errrr ... fair question.
It pumps well when manually operated, but I haven't checked it while cranking.
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
errrr ... fair question.
It pumps well when manually operated, but I haven't checked it while cranking.
👍🏻 if the oil had not been changed for a while, it could be the lever on the back of the pump has worn through on the cam, or it’s been fitted wrongly underneath the cam.
 
Gecko

Gecko

Well-known member
👍🏻 if the oil had not been changed for a while,
The oil is clean (golden), so no hints what it was like before the change. Same as the fuel filter - spotless inside the element and the glass bowl ... and yet there was water in the pump.
👍🏻 if the oil had not been changed for a while, it could be the lever on the back of the pump has worn through on the cam, or it’s been fitted wrongly underneath the cam.
Moan .... I did that once - Snapped the leaver off - had to drop the sump to get it out. A mistake only made once!
I haven't checked it while cranking.
With no back-pressure, it's hard to tell if it's pumping- only a dribble out the bleed nipples (fuel can be heard returning to the tank with manual pumping).
 
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V8Druid

V8Druid

do it as well as you can,but learn to do it better
The oil is clean (golden), so no hints what it was like before the change. Same as the fuel filter - spotless inside the element ans the glass bowl ... and yet there was water in the pump.

Moan .... I did that once - Snapped the leaver off - had to drop the sump to get it out. A mistake only made once!

With no back-pressure, it's hard to tell if it's pumping- only a dribble out the bleed nipples (fuel can be heard returning to the tank with manual pumping).
taking the path of least resistance ... can you squeeze off the return to tank line or plug it at a fitting somehow, then try priming the injector pump at the bleeds, followed by priming the injector lines at the injectors, cranking ... try for a fire up once bled up, but the return line is gonna have to get connected if it fires up or it risks over fuelling and a run away even ('praps)
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Take the mechanical lift pump out make sure it all works on the cam lever! Buy yourself a an electric fuel pump! Pipe from tank to lift pump outlet pipe!
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Take the mechanical lift pump out make sure it all works on the cam lever! Buy yourself a an electric fuel pump! Pipe from tank to lift pump outlet pipe!
think if OP can hear it going to tank, he really needs to stop the return temporarily to pressurise everything else and see if it'll get up to injectors ... I'm guessing the injector pump will be above the filter housing so likely to always have air, unless it is forced out by stopping the path of least resistance to the tank and force filling everything else -- once the High pressure side is full it should stay that way ... only bleed off will be the return rail on the injector heads
 
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Gecko

Gecko

Well-known member
I keep a stock of electric pumps, so that is certainly an option.
There is a tractor wrecker not far, so I'll visit tomorrow and see if I can find a MF filterhead with the non-return/over-pressure valve present.
 
Gecko

Gecko

Well-known member
There is a tractor wrecker not far, so I'll visit tomorrow and see if I can find ....
Hmm .. that didn't go well. Since my last visit, they scrapped 960t of machines and parts, now they have an empty warehouse and yard :( .
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Hmm .. that didn't go well. Since my last visit, they scrapped 960t of machines and parts, now they have an empty warehouse and yard :( .
Money in the bank, all your bits will be in India somewhere!
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
If you undo the Pipework either side of the mechanical pump, push some fuel pipe on and loop in the electric pump see what you get at the filter head👍🏻
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
If you undo the Pipework either side of the mechanical pump, push some fuel pipe on and loop in the electric pump see what you get at the filter head👍🏻
or just take the feed pipe out at the filter from the pump and see if you're getting a strong flow with each stroke ;)
 
Gecko

Gecko

Well-known member
Is that an original pink glass bottom filter😊
Just realised what you are eluding to :ROFLMAO:
We've never had Red Diesel here.
All diesel is sold with a full tax load and it is up to the user to prove to the tax dept. that is was "used off road" and therefore exempt from the excise.
 
Gecko

Gecko

Well-known member
Back to the Lincoln today and more confused than ever (can happen).

I bought a complete filter assembly from a used parts place to get the non-return valve.
When it arrived, I was surprised to see the head only had three ports - oh well, pull the valve and see if it fitted the original - it did ... but.
The banjo bolt supplied with the (used) filter is drilled up the center, but no transverse hole. I can see no path for fuel from the filter head to the banjo.

Getting more than a little skeptical at this point, I pulled the equivalent 'banjo' bolt from the equivalent filter on my MF135. Once again, it's hollow, but no transverse hole and no apparent path between the filter and the banjo coupling.

Anyone prepared to pull the equivalent bolt and confirm?
 
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