In tank pump failure, pics

Here are some pics of an in tank failure I experienced.....

What exactly is the purpose of all the shims??? In all the pics i have seen around here some seem to have them, some don't and some are tough to tell.

They form the pumping cavity

what is the failure rate of these pumps?

Guess i should have worded that differently.....what i mean is why is it that some of them look like they have one piece for that duty and some like yours are individual shims. Or is it just me, i have yet to pull my pump so i can't say i have played with one much. Looks like its all just a press fit, after years bathed in diesel vibrating around i can see why the bottom seems to fall off these so often.

Those so called "shims" direct the flow of fuel to the outlet hose. The motor turns that rotor/impeller, centrifical force draws fuel into the center area of the rotor, which flings it down the little chute to the outlet. The rotor impeller, the "shim" thingies, and screen cover that holds it all together, is the "PUMP". When its disassebled, it won't pump.

If you can re-assemble the parts, perhaps the unit can be made servicable. Best to determine how it fell apart, that future heart burn, can be avoided.

Lee in Alaska

The screen is a "pressed" in unit that holds the whole deal together......

When I put it back together I'm going drill and tap 4 holes to use screws to hold the screen/bottom plate in place.

Mine looked the same?

When your pump failed could you still hear it running? The reason I am asking is that mine would make no noise at all! Before I cotter pin it all back together I would like to know it has at least a change of being serviceable again.
James G.

RE: Mine looked the same?

Yes It sounded like it was running, but no pumping......

RE: Mine looked the same?

If the pump is not running try pulling up the wire that runs down the center of the pump. There have been a couple of occasion that the wire has worn thru and shorted the fuse. I pulled the wire out as far as possible and put some electrical tape on the wire. It worked. Saved me from purchasing a rebulit pump.$$$$

RE: Mine looked the same?

Had the same problem only the bottom of the plastic housing that the shims and screen fit in was very chewed up, don't really know why. I was able to drill four holes through it and the screen and safety wire it together very nicely however.
BC

in tank fuel pump failure

as long as the motor turns the impeller and the stainless shims (right name for the part is the volute) are in the right place,it makes a simple pump that should last forever. The volute and bottom pan all seem to be pressed into a plastic upper case and intake. If you drill and tap a couple of screws through it on each side of the volute,it will continue to pump trouble free till the motor will no longer turn it. Be careful when you tighten up the screws since the impeller and the volute should have a fixed clearance that you could affect. Just make sure it spins freely after you put it together

Bill

RE: in tank fuel pump failure

Would really like to see the oem pump post-repair. Where you boys decided to put ur scews and wires and such so's I can get an idee on how to retro/repair mine in the event 1) GL turns mine loose 2) it augers in and buys the farm

RE: in tank fuel pump failure

it's a pretty common problem. I posted some time ago with the same issue. when you put it back together you can either use screws to hold it together or do I and others have done and safety wire it in place so it cant fall off again.

RE: in tank fuel pump failure

Here is my fix.

http://www.steelsoldiers.com/index.php?name=PNphpBB2&file=viewtopic&p=56311&highlight=#56311

Here is my field fix. Note how bottom of shroud is quite chewed up.
BC

Boatcarpenter said:

Here is my field fix. Note how bottom of shroud is quite chewed up.
BC

Click to expand...

looks like youve got gremlins lol, what would cause that part to get chewed up?

I'm not sure Jeeperjoe. I wish I knew. There wasn't anything in the tank that could have done it, as least when I got the truck.
BC

Thats corrosion, Galvanic? correct term?, of the Aluminium/pot metal whatever you want to call it. The oil cooler cover on a couple of my trucks showed the same corrosion/pitting.

I just want to say thanks to FMJ and Boat Carpenter for the pics posted on this problem and all of the others who commented on a fix. My in tank pump was running but not pumping fuel and after researching this site and reading this I pulled my in tank pump and also found the bottom had fallen off. There was nothing visible in the main tank compartment, had to fish around with a magnetic telescoping rod into the side compartments through the small openings to try and locate the bottom. Finally located the bottom in the corner of the far left compartment, drilled some holes and re-installed the bottom plate with stainless steel 18 guage wire and now it works like a champ. Without the pics I would have had no clue what I was looking at or for! A BIG THANK YOU to everyone!!!!!!!