New Holland LX885 fuel issues

[thepumpguysc]

It looks to me that u have:
The fuel tank..
The hand primer..
The filter/water separator..
The inj pump..
U haven’t found a supply pump have u.??

The inj pump has a built in transfer pump that will pull the fuel in, ONCE the system gets primed without any air leaks..BUT the fuel has to be at the inj pump inlet first.. before it’ll start pulling in fuel..

U can open the bleeder screw on the side of the inj pump and start pumping the hp..
U should see fuel start to fill the filter/h2o separator..& pushing AIR OUT of the bleeder screw..
Once the air is out and u start to see FUEL coming out of the bleeder screw, snug it back up..

 

[TVA]

There’s no supply/lift pump. That hand pump - is all that is.

 

[TVA]

I would add that fuel must be at the transfer pump, without bubbles and air pockets in the lines and filters.

 

[houser]

TVA and Thepumpguyssc - Thanks again for your continued help. In the parts manual pic below, some of the arrows on the filter show the in and out. I know the other day, I loosened the drain plug on the filter and pumped the hand pump. Fuel squirted out of the filter. I posted below pics from the parts manual that somewhat show the flow of the hand pump. It appears to pull through the filter and push into the sediment bowl. I guess this is why the the pump isn't working with no fuel being present. Bolt #3 is listed as a hand pump plug. I will try loosening that one to see if I can pull fuel using only the hand pump. Bolt #5 is also listed as a plug. Thanks again for your help.

 

[TVA]

To where the other side of the hand pump connected to?
The bottom picture doesn’t match the top. Bottom actually shows correct connection of the hand pump ( in my opinion), the line from that tank comes in to the suction side of the hand pump, and both filters on the pressure side of the pump. I know it’s not clear from that picture, because of that tube looping around the pump - but I kinda remember the location of the bracket for that pump, and I think that’s how it is.

But that is not what’s going on the top picture, that pump pulls fuel at least through one filter

 

[TVA]

But you have pressure sensor in the port 2 ( sediment bowl to), so that one should be under pressure. Although it doesn’t make much sense. Because water separator should come before secondary filter.

 

[TVA]

What I’m getting at - I had to swap filters around on one of those forklifts, because they were installed in wrong sequence, and it was running like crap

 

[TVA]

I think that hand pump pulls through both in your set up, what you saw was return from the injection pump, looping around and giving you impulse.

I think that looping around is bad set up, because hot fuel should go back to tank for cool down - but that’s how they do things. Cummins does the same on B series with those CAV pumps, only take return from the top of the input shaft.

 

[houser]

TVA

I think that hand pump pulls through both in your set up, what you saw was return from the injection pump, looping around and giving you impulse.

I think that looping around is bad set up, because hot fuel should go back to tank for cool down - but that’s how they do things. Cummins does the same on B series with those CAV pumps, only take return from the top of the input shaft.

- thanks for the discussion. I will have to check my setup, but the lower Pic I posted has an "A" and "B" that designated where the pump connections go. It appears to simply push and pull fuel through the sediment bowl tothe filter. The fuel line comes into the sediment collector and the to the filter. It appears to be just like my old tractor confirmation, simple but effective. I will be working on it later this morning and will provide more updates. Thanks again.

 

[TVA]

TVA

- thanks for the discussion. I will have to check my setup, but the lower Pic I posted has an "A" and "B" that designated where the pump connections go. It appears to simply push and pull fuel through the sediment bowl tothe filter. The fuel line comes into the sediment collector and the to the filter. It appears to be just like my old tractor confirmation, simple but effective. I will be working on it later this morning and will provide more updates. Thanks again.

Yep, but that’s not the set up you have on this one.

 

[houser]

I think that hand pump pulls through both in your set up, what you saw was return from the injection pump, looping around and giving you impulse.

I think that looping around is bad set up, because hot fuel should go back to tank for cool down - but that’s how they do things. Cummins does the same on B series with those CAV pumps, only take return from the top of the input shaft.

Ok, thanks again

 

[houser]

Final update. I have it running! I primed it by taking loose the return fuel line to the tank and plugging another hose into it and closing that hose off. I cracked open the line that feeds from the filter to the injection pump. I puffed air into the tank and forced fuel into the sediment bowl and some into the filter. I then used the pump to finish filling the filter. I closed the line and pumped the hand pump until it wouldn't pump any more. I then turned over the NH 5 or 6 times and then pumped the hand pump again. I repeated several times, and it started. You would think there is a better way to prime it than forcing air into the gas tank! thanks again to TVA and Thepumpguyssc! You guys were very helpful!

 

[TVA]

Yeah! I think you’re not out of the woods yet, something leaking somewhere ( sucking air). It shouldn’t be that difficult to prime it.

We will see how it will restart tomorrow morning

 

[TVA]

Does that thing makes bigger ruts than the tracked machine? Distance between wheel centers being that long?

 

[thepumpguysc]

Glad u got it going..
Hope it’s one and done..

 

[houser]

Yeah, mee too!