fuel pump location in tank

[ron55]

anybody know where the fuel pump is actually located in fuel tank on W22 chassis such as in the center, right or left looking forward, fore or aft?
I would like to cut an access hatch through the deck of my M/H so I could change out the pump without such a hassle. I always keep my tank full and hardley ever get below 3/4 of tank on the road. thanks

[speed racer]

It is in the center side to side and just to th rear of center front to back. Mine has a holding tank above it so I had to drop the tank when the squirrels chewed a hole in my high presure fuel line and chewed the wiring to the fuel pump. Dropping the fuel tank was'nt that hard but thats easy for me to say it's what I did for a living.

[mgscott4]

I dropped mine last year on my 30ft P32 to replace the fuel line to the generator. There was a short rubber coupling tubing on top of the tank that rotted away. So if you do decide to drop the tank, I recommend you replace this rubber fuel line connector to the hard fuel line that goes to the generator.

It wasn't too bad. Get it up high to give you plenty of room. 2- 6 ton jack stands, 2- 2 ton floor jacks, and 3 people. one person worked one of the floor jacks while one person concentrated on stabilizing the tank, and one person stabilizing the tank and occasionally lower the jack. It had a bout 10 gallons left in it when I dropped it. Mine had a screen at the filler neck connection so you can't siphon the gas out until you remove the filler neck and screen. Borrow/ buy all the 5 gallon fuel jugs from your buddies. I also used 5 gallon buckets (illegal). Good luck.

Just a thought. What about abandoning the pump in place and put an electric in-line fuel pump along the side rail near the fuel filter? You can tap the power off the wiring going to the in tank pump.

[DriVer]

Quote:

Originally Posted by mgscott4 Just a thought. What about abandoning the pump in place and put an electric in-line fuel pump along the side rail near the fuel filter? You can tap the power off the wiring going to the in tank pump.

I have not heard of anyone trying to relocate a fuel pump to an external location in the 10 years that I've been participating here in this forum. I think it is easier said than done however I would not doubt that someone could do it given the time and need to accomplish the task.

The fuel pump is long term reliable and like anything it can fail over time. It took 7 years for mine to fail but it was replaced within a week and I was back out on the road.

[M&EM]

Quote:

Originally Posted by mgscott4 Just a thought. What about abandoning the pump in place and put an electric in-line fuel pump along the side rail near the fuel filter? You can tap the power off the wiring going to the in tank pump.

I posed this question to an engineer at one of the manufacturers of in tank fuel pumps back in 98 regarding a pump in my class C ford. His response was that the tight clearances of the in tank pumps impeller would would severely limit volume and result in an eventual vapor lock in the suction side of the external pump as things heated up.

I suppose it could work using the generator feed line.They usually don't extend to the bottom of the tank and would exclude use of the generator. Might not be a bad back up plan any way with a check valve.
Marty

[cvrvr]

Dont know about your coach, but on mine, I have a black tank between the gas tank and inside floor.

George

[mgscott4]

I think it would be easy to install an in-line pump. Check one out. Back in the day when they were transitioning to electric pumps from mechanical, many of them were external. High performance engines needed more fuel to feed large carbs.
Airtex Master/Fuel Pump (E8099) | AutoZone.com

[mgscott4]

As a matter of fact, if I was on the road and my fuel pump went out and I needed to be somewhere, I would consider installing an in-line fuel pump. It might even fit in place of the fuel filter. A couple of adapters and a clamp. I would even feed a 12v hot wire and a toggle in the cockpit to turn it on and off. Sometimes you "do what you gotta do".

Don't know if you could draw fuel through a "dead" pump in the tank. Probably have to tap off of the generator feed line.

[max49]

Quote:

Originally Posted by mgscott4 Just a thought. What about abandoning the pump in place and put an electric in-line fuel pump along the side rail near the fuel filter? You can tap the power off the wiring going to the in tank pump.

I don't know for sure if it would work, but I like the way you think
"Outside the little box".
However, why have'nt we heard of it before? I had an additional electric fuel pump on my old 409 Chevy, but of course it was carbureted. Has fuel injection and higher pressure needed changed this?

[M&EM]

Quote:

Originally Posted by max49 I don't know for sure if it would work, ===== However, why have'nt we heard of it before? I had an additional electric fuel pump on my old 409 Chevy, but of course it was carbureted. Has fuel injection and higher pressure needed changed this?

Max see my post above why it may not work.

Marty

[dieselclacker]

I don't know if you can draw fuel thru the dead pump. The fuel line for the generator on my coach is only a 1/4 inch line. Probably couldn't get over any hills using it to feed an auxillary pump.

Dieselclacker

[DriVer]

Quote:

Originally Posted by max49 I don't know for sure if it would work, but I like the way you think, "Outside the little box".

Max, With several thousands of dollars and months of lost time using your motorhome, my thoughts would be to stay in the box. But that's just me.

I would cast my vote to keep the OE fuel pump location the way it came from the factory.

[max49]

Quote:

Originally Posted by DriVer Max, With several thousands of dollars and months of lost time using your motorhome, my thoughts would be to stay in the box. But that's just me. I would cast my vote to keep the OE fuel pump location the way it came from the factory.

Driver, you act like every thing in the box is perfect. If that was so I wouldn't have needed all those plug wires, my replacement fuel pump, my twice replaced IP, air bags and the entire engine, the list is ongoing and never ends. WH is far from perfect and you ought to know that with all "afterarket' goodies you put on. I remember when the 1 qt. Oil filter and fuel filter adaptor could cause doomsday in your opinion. U remember, don't ya?

[DriVer]

Quote:

Originally Posted by max49 Driver, you act like every thing in the box is perfect. If that was so I wouldn't have needed all those plug wires, my replacement fuel pump, my twice replaced IP, air bags and the entire engine, the list is ongoing and never ends. WH is far from perfect and you ought to know that with all "aftermarket' goodies you put on. I remember when the 1 qt. Oil filter and fuel filter adapter could cause doomsday in your opinion. U remember, don't ya?

Not withstanding all the aftermarket bolt on components that I have installed over the past 10 years .... I am personally going to leave my fuel pump in the tank.

I have never stated that the OE as deliverd chassis is perfect or I would not have from soup to nuts in after market equipment on my chassis so I don't know where you came up with that.

I have not approved of all the bolt on equipment that I have tried in fact I killed the Crystal-Cool package which never worked. I would not recommend a product to anyone unless I believed in it and it worked as specified.

You are the captain of your ship. You have my permission to put your fuel pump outside of the box if that's what it takes to make you happy.