MD Fuel priming issues

[bud from bc]

Having a problem getting diesel to the cannister filters. Have tried the gravity method as the manual states
but can only get fuel to sediment bowl bleed screw. Tried priming, running engine on the gas side but still
no fuel to the cannister bleed valves. Any ideas what i'm missing?

 

[rustred]

How full is the fuel tank ? And how are you bleeding it ?

 

[Powered By IH]

Having a problem getting diesel to the cannister filters. Have tried the gravity method as the manual states
but can only get fuel to sediment bowl bleed screw. Tried priming, running engine on the gas side but still
no fuel to the cannister bleed valves. Any ideas what i'm missing?

Just going through the bleeding process again:
The fuel tank should be 1/3 tank or fuller. Open up the petcock on the bottom of fuel tank (1). Crack bleeder on top of water separator until a steady flow of diesel flows out (2). Tighten it, then crack loose the primary (right) filter hold down bolt (3). You hopefully should have fuel to the water separator and the primary filter with the engine off since they are both gravity fed.

Once the primary filter fills, then start the engine and run on gas. Crack the final fuel filter bolt (4), and once you get diesel there, open the throttle all the way to bleed the injectors (5&6). Switch the switchover lever to diesel and you should be good if it's working properly (if I remember correctly).

When you say sediment bowl are you talking about one under the fuel tank or the actual water trap? So you can get fuel to the water trap but not after? More information is needed so we can hopefully help you.

 

[rustred]

Just going through the bleeding process again:
The fuel tank should be 1/3 tank or fuller. Open up the petcock on the bottom of fuel tank (1). Crack bleeder on top of water separator until a steady flow of diesel flows out (2). Tighten it, then crack loose the primary (right) filter hold down bolt (3). You hopefully should have fuel to the water separator and the primary filter with the engine off since they are both gravity fed.

Once the primary filter fills, then start the engine and run on gas. Crack the final fuel filter bolt (4), and once you get diesel there, open the throttle all the way to bleed the injectors (5&6). Switch the switchover lever to diesel and you should be good if it's working properly (if I remember correctly).

When you say sediment bowl are you talking about one under the fuel tank or the actual water trap? So you can get fuel to the water trap but not after? More information is needed so we can hopefully help you.

there is no sediment bowl under the tank on these diesels. its behind the pump.

 

[Powered By IH]

there is no sediment bowl under the tank on these diesels. its behind the pump.

I have occasionally seen them added later under the fuel tank even though it's not factory. That's why I was asking for clarification.

I'm assuming he's talking about the water trap, just incorrect terminology, and that's totally ok

 

[bud from bc]

Ya it's the water trap behind the pump can get fuel to that bleed screw but can't get fuel
to the primary filter. Have been trying just the way you described. Tractor has sat for over 5 years
have replaced fuel filters and i'm sure it went together correctly. Thanks for the input guys might have
to pull the filters and check to see if there is a blockage somewhere. Tank is full

 

[rustred]

If you loosen the line going to the primary filter it should be easy to see if you have fuel flowing. Have u left the bleeder open for a while? And so this tractor has not been running in 5 years ? And what is the pressure gauge on the pump showing when running ?

 

[rustred]

The rack in the pump could also be stuck from sitting. But u still should be able to bleed the system up to the pump. And if it’s stuck u will get no fuel to injectors from pump.

 

[Powered By IH]

Ya it's the water trap behind the pump can get fuel to that bleed screw but can't get fuel
to the primary filter. Have been trying just the way you described. Tractor has sat for over 5 years
have replaced fuel filters and i'm sure it went together correctly. Thanks for the input guys might have
to pull the filters and check to see if there is a blockage somewhere. Tank is full

Can you open the primary filter drain and see if diesel comes out?
If fuel comes out there, then try unscrewing the primary filter bolt like you are taking it off (not the bleeder) and see if you can get fuel up to the top.
If you can get fuel at the top then, the bleeder is plugged.

If you can get fuel at the filter drain but not at the top, the filter is air locking somehow.

If you can't get fuel at the filter drain, then the passage from the water trap to the primary filter is plugged, or something in the water trap is askew.

Keep us updated!

 

[rustred]

just pull the bleeder right out of housing, instead of loosening the centre bleed bolt. plus blowing in the tank with an air nozzle and rag may help. plus this bud is not working with us so why would we keep posting to air. dont understand this,... must not be too worried about or of fixed it or what ever. that's the worst,... ask for help then disappear. i got no questions answered.

 

[used red MN]

plus this bud is not working with us so why would we keep posting to air. dont understand this,... must not be too worried about or of fixed it or what ever. that's the worst,... ask for help then disappear.

I just don’t understand what difference this makes to you? You throw “negative vibes” or it shines a bad light out from this forum when you do this, I’m not sure how else to say it. How does it affect you if you answer in two hours or a week from now? I guess you just can’t accept that not everyone approaches a project on the same timeline that you use. You continue to read and answer the threads here so you must support the purpose of the forum. I can’t understand why you want to chastise others that come here for information and an interaction that apparently gives you some satisfaction in supplying your knowledge too. Whether you consider it pleasure, entertainment, a pastime I’m not sure; but some of your responses down these lines really confuse me.
If you would have stopped at “…nozzle and rag may help.” That is really all you needed to say.

 

[rustred]

I just don’t understand what difference this makes to you? You throw “negative vibes” or it shines a bad light out from this forum when you do this, I’m not sure how else to say it. How does it affect you if you answer in two hours or a week from now? I guess you just can’t accept that not everyone approaches a project on the same timeline that you use. You continue to read and answer the threads here so you must support the purpose of the forum. I can’t understand why you want to chastise others that come here for information and an interaction that apparently gives you some satisfaction in supplying your knowledge too. Whether you consider it pleasure, entertainment, a pastime I’m not sure; but some of your responses down these lines really confuse me.
If you would have stopped at “…nozzle and rag may help.” That is really all you needed to say.

ya ok , dont read my replys then, you dont need to be always chastising me , and you wont be confused, as you spend all your days on here. just like a coyote in the bush looking for a mouse and your chance to jump on me. i know what i know. I'm sure someone looking for info would at least check back every so often. maybe stay off my case and get on your john deere. i still stand by my posts, and i am in the real world, if the op is looking for info then work with us, its that simple. there is lots that post and run as thats what I'm saying. if someone else would have posted this you would not have said a thing. and i was not replying to you either, and didnt know you are now a moderator, and you have quite the attitude. thank you very much.

 

[Jim.ME]

just pull the bleeder right out of housing, instead of loosening the centre bleed bolt. plus blowing in the tank with an air nozzle and rag may help. plus this bud is not working with us so why would we keep posting to air. dont understand this,... must not be too worried about or of fixed it or what ever. that's the worst,... ask for help then disappear. i got no questions answered.

I understand the frustration of not getting a response regularly. Maybe he will be around tonight. Looking at the time stamps on his two posts here, he might not have seen your latest posts yet today. Looks like he posts in the 9 pm to 11 pm time frame, if he is in British Columbia.

 

[bud from bc]

Sorry guys for not following up sooner trucking is kinda taking over from wrenching right now. I'm going out of town for a few days and when i get home i will follow through with a couple of the hints. Thanks for the replies will keep you guys posted

 

[Fritz Maurer]

Once again, a poster feels obliged to apologize for asking a question when he had to go somewhere and work for a living.

 

[trackrat]

just pull the bleeder right out of housing, instead of loosening the centre bleed bolt. plus blowing in the tank with an air nozzle and rag may help. plus this bud is not working with us so why would we keep posting to air. dont understand this,... must not be too worried about or of fixed it or what ever. that's the worst,... ask for help then disappear. i got no questions answered.

not everybody is as mechanically sharp as some it takes, that hated word patience sometimes to help them to solve the problem

 

[rustred]

not everybody is as mechanically sharp as some it takes, that hated word patience sometimes to help them to solve the problem

Yes , but all the OP should have said is he wouldnt be home for a few days till he gets to it. Then all is good. Many do post that , and it’s appreciated.

 

[Powered By IH]

Crack bleeder on top of water separator until a steady flow of diesel flows out (2).

Sorry, got ahead of myself in this post.
The screw I previously mentioned (in quoted post) connects to a tube that goes down into the water trap. It's purpose is to drain the water that collects at the bottom without having to remove the glass bowl. It serves no purpose for bleeding anything.

The real bleeder (circled in blue) for the water trap is tucked behind the bolt holding the water trap on. It is a flathead screw, as seen in the screenshot. (From Just a Few Acres Farm). This is the actual bleeder the book is talking about for bleeding the water trap.

If you can't get fuel to the primary filter drain, cracking this would tell you whether the water trap or the passage to the filter is plugged.

However, if you already knew this, carry on and keep me posted!

 

[rustred]

The reason I said to remove the bleeders from the filter housing in post 10 is to make sure the bleeder holes are not plugged. And I have always bleed the sediment bowl with the roll pin bleed screw.

 

[bud from bc]

Hey guys got a chance to look at the md today tried the air in tank thing still no prime. Started cracking lines
and found good fuel flow out of tank but minimal flow at water separator and lot's of air in separator pulled
the line and it's full of a black tar like goo. Got it soaking tonight but i sure hope it's not like that inside the
pump. Not going to be able to work on it again for a few days but will let you know what happens. Thanks for
the tips