New Holland LX885 fuel issues

[houser]

If u can’t get fuel out of that double bleeder screw, ur not gonna get fuel out of the lines AT THE INJECTORS..
Definitely try pressurizing the tank to get the fuel to the inj pump..
Don’t blow anything up.!!
U can over pressurize the fuel tank AND the filters..
Good luck

Thanks. Will probably try that tomorrow. I previously blew up a swimming pool pump doing this, so hopefully I learned my lesson!

 

[houser]

 

[thepumpguysc]

Hmmm.. with a diaphragm in the hand primer, idk weather or not I’d pressurize it.. u stand a real good chance in blowing the rubber diaphragm..??
Just be careful..

 

[TVA]

Does the plunger on your hand pump doesn’t really want to jump back?

 

[TVA]

Take that one off, and pump with hand pump, see if fuel coming out

 

[TVA]

Hmmm.. with a diaphragm in the hand primer, idk weather or not I’d pressurize it.. u stand a real good chance in blowing the rubber diaphragm..??
Just be careful..

It might already been blown, or cracked.

 

[TVA]

I would take the hose that goes from the fuel tank off, and try to suck fuel with my mouth.
But that’s just me, I’m not afraid to taste a little of a diesel fuel.

If fuel goes without any restriction - I would check the diaphragm in the hand pump next. If that checks out OK start check for leaks in lines and filter housing.

 

[houser]

Does the plunger on your hand pump doesn’t really want to jump back?

It worked yesterday when there was fuel in the sediment bowl and filter. But now that they are empty, it doesn't want to pull fuel up from the tank. It does go down and come back up.

 

[houser]

Take that one off, and pump with hand pump, see if fuel coming out

ok, will try that tomorrow, thanks for all the help. This is worse than priming my diesel truck!

 

[houser]

I would take the hose that goes from the fuel tank off, and try to suck fuel with my mouth.
But that’s just me, I’m not afraid to taste a little of a diesel fuel.

If fuel goes without any restriction - I would check the diaphragm in the hand pump next. If that checks out OK start check for leaks in lines and filter housing.

I'll take it loose from the upper point and blow through it tomorrow . I was also wondering if it might be clogged or something.

 

[TVA]

ok, will try that tomorrow, thanks for all the help. This is worse than priming my diesel truck!

Yes it is. That system is goofy.

 

[houser]

Hmmm.. with a diaphragm in the hand primer, idk weather or not I’d pressurize it.. u stand a real good chance in blowing the rubber diaphragm..??
Just be careful..

I'm going to loosen up the bolt that holds the fuel filter in place and let the air escape from that point as a start.

 

[TVA]

I would be interested in how the lines to that hand pump are connected.
Is it sucking through both filters, or one is in suction and the other is in pressure?

 

[TVA]

When you will have tank hose off - plug the inlet with your finger, and use the hand pump. If after a few pumps it will be slow to come back up - there’s no air sucking leaks. If it will continue to go up and down easy - you are sucking air somewhere.

 

[houser]

I would be interested in how the lines to that hand pump are connected.
Is it sucking through both filters, or one is in suction and the other is in pressure?

I will look closer at the fuel path tomorrow.

 

[thepumpguysc]

Don’t forget that those lines seal with a rubber grommet called “olives”.. they fit over that space on the steel line and seal inside the hole..
Look inside the hole where the line goes to make sure the olive didn’t flip and is now blocking off the hole.. or a piece of the rubber didn’t shear off and is blocking the hole..(seen it a million times)
Just something else to look for..

 

[thepumpguysc]

Isn’t the bolt/screw ON TOP of the double filter head, the one in the center of the 3 in-line screws the air bleed screw.??
Idk I’m just asking..

 

[TVA]

Isn’t the bolt/screw ON TOP of the double filter head, the one in the center of the 3 in-line screws the air bleed screw.??
Idk I’m just asking..

I used it for bleeding before, but I think the filter in the right has another bleeding screw on top of the housing.

Not sure how that hand pump is connected, what in suction and what in pressure.

 

[thepumpguysc]

In my mind: suction should be the line pointing to the tank and pressure should be on the other side..
Sucks from the tank and pushing fuel to the inj pump.??

 

[TVA]

In my mind: suction should be the line pointing to the tank and pressure should be on the other side..
Sucks from the tank and pushing fuel to the inj pump.?

What I meant, I don’t know how that hand pump is routed. Are filters both on the suction side of it, on pressure side of it, or one on one side, and the other on other.
When hand pump not working - it’s all suction all the easy to transfer pump.