Wehring's Dual Fuel Lines

Thanks to Franz, Elgin and my good friend Mitch "tube wizard" Sweeny, the dual fuel line conversion is done. Stainless lines and fittings.

The air compressor is now feeding off of the positive pressure side.

Now I need to change out the aneroid diaphram on the IP. In the last picture there are two bolts with colored arrows. Which color do I need to remove to remove the IP? I think the green arrow but I would like for you to confirm.

Justin Wehring
979 997 3112

Remove 4 12 point bolts that go into the compressor. There will be a triangle shaped cover on the back side of the pump. Remove the 3, 1/4 inch capscrews and the cover will come off. There will be a red, orange or black rubber lookin' thing with a nut in the middle. You can pull the whole assembly out. DO NOT use any tool on the shaft. Grip it on the steel cup and take the nut off. Remove the diaphragm, install the new one and put a drop of loctite on the threads. Let it set up a bit, be careful not to get loctite on the shaft. Use a cleaner that dries fast and leaves no residue, like electronic cleaner, on the shaft and the hole it goes into. put a drop or two of MMO or equiv. on the shaft, put it in the hole, give it a rotation and re assemble the unit.

Justin, if you have questions, call me.

Justin did you bend the line as you went (test fit remove bend, test fit reove bend, etc.) or did you have a template?

line

Thanks Will. I will fix it tomorrow. Stand by for the drama call.

A good friend that hand-builds gas panels at NASA came over and knocked it out in about 30 min. He is a wizard at bending tubing. No template.


Justin Wehing
979 997 3112

You should have had hime bend muiltiple...and sell them...

Bighurt said:

You should have had hime bend muiltiple...and sell them...

Click to expand...

I second that... I think some of us would be interested.

ask

I can ask but he has usually had enough of tubing at the end of each day. He did this for me as a friend.

What will you guys be willing to pay for a line?

Justin Wehring
979 997 3112

looks good!

Ok, you are going to have to help me out here. I don't understand what you did. Says something about dual fuel but I only see one line. Edumacate me.

frodobaggins said:

Ok, you are going to have to help me out here. I don't understand what you did. Says something about dual fuel but I only see one line. Edumacate me.

Click to expand...

The primary line runs to the rear, the additional second line he added goes to the front. Turns out Cummins had the idea the army just never implemented it...

On a lot of 855s, cummins only had ONE fuel, and ONE return, I have seen both go in the front, both to the rear and one to the rear, one to the front, think it depended on application and what else was going on with the engine. I guess if you wanted to get real anal about fuel feed, you could run a line to each end of each head to guarantee no pressure loss or difference.

I think you can just order a Cummins 400 front fuel line. The 400 Cummins I have seen have two lines front/rear.

Benefits

What are the advantages to dual fuel lines? Power? Easier Starting? Economy? Reliability? Help me out here please

benefits

I have not noticed more power but the truck starts easier and idles better.

Justin Wehring
979 997 3112

Castle Bravo said:

I second that... I think some of us would be interested.

Click to expand...

Just rember the 400 has the line run to the rear and we add one to the front with little problem. The 250 has it run to the front and we have to add to the rear and it is a tight fit to be working in.

I would also be interested in two lines.