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Internal Fuel Pump - Pics and a Question

Discussion in 'Loop & Tonti' started by Yellowheader, May 15, 2017.

  1. Yellowheader

    Yellowheader Just got it firing! GT Contributor

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    Last week I found myself stranded (not far from home luckily) when my Stone conked out on me. Some hunting around on Guzzi Tech and other sites pointed to a disconnected fuel hose inside the tank. The threads dealing with that issue don't have a lot of pictures, so when I opened up my tank I snapped some. I hope by posting them here someone can take on this repair with a little more confidence than I felt going in.
    First, the access panel on the inside of the tunnel under the tank. This is looking into the front toward the back.
    [​IMG]
    Here's the tank removed and lying on its side with the access panel screws removed. I gather from other threads that the line coming off the red elbow is a quick-detach fitting, but I never figured out how to get it undone. I just took the hose off the hard way.
    [​IMG][/URL][/IMG] [​IMG][/URL][/IMG][​IMG]
    Here is the access plate pulled away from the tank. Here was my problem - no hose was attached to the gray pipe, which is the pump outlet.
    [​IMG]
    For me, the trickiest part of the removal was getting the filter out without mangling the ribbed plastic hose connecting it to the access plate. When I disconnected it from the plate, things came out much easier.
    [​IMG]
    Here's the filter with the two hoses attached. A PO had done this operation before: you can see the worm-screw clamp where it was attached to the fuel pump. The hose was mangled under that clamp and eventually slipped off again.
    [​IMG]
    Hauling out the rest of the assembly: pump, pressure regulator and electrical connectors. Once the filter and hoses are out of the way, this comes out fairly easily.
    [​IMG]
     
  2. Yellowheader

    Yellowheader Just got it firing! GT Contributor

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    Here's my question. When I opened up my tank, the filter was floating free, anchored only by the hoses that connected to either end. However, I noticed that the plastic bracket that holds the fuel pump in place also has some tabs that the original filter nestles into, but it doesn't snap into place the way the pump does.
    [​IMG]

    Should the filter be attached to this bracket assembly somehow? If so, how is it done? I suspect one or more tabs is broken off my bracket, but I'm not sure what all is missing. Thanks for any advice you can share.
     
  3. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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  4. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    Scott,

    The Tonti fuel pump in tank is much different from a CARC bike. When the assembly is together it is a real PITA to get out, and worse to get back in. If the engineer had made the hole a few millimeters larger the task wouldn't be so bad. If memory serve me correctly, the fuel filter is retained by a zip tie.

    Yellowheader, get rid of that clear plastic line. You should have submersible fuel line in there.
     
  5. Yellowheader

    Yellowheader Just got it firing! GT Contributor

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    Thanks for posting the picture Scott. As John says, mine is somewhat different from that, with the pump going the opposite direction.

    John, I did replace the brownish clear hose with a blue plastic hose. Everywhere I asked for a submersible hose I got a blank stare, so I grabbed a piece of this stuff, reasoning that, as a single-ply product, if it can withstand constant exposure to fuel on the inside, it should be able to on the outside too. I'll try the local Guzzi dealer for the hose this weekend, but if they even know what I'm talking about they'll probably have to order it. The ribbed hose is OK, right?
     
  6. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    Hi John,

    I was just looking at the bracket he asked about in relation to a picture I had seen. Hence, the "???" That's all. There was one other picture as well but again, not sure. Just a "toss out"... FWIW

    IMG_3400.jpg
     
  7. scottmastrocinque

    scottmastrocinque Scott Mastrocinque GT Famiglia

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    I found you some pictures of the exact part number stamped on your part in your photos. Hopefully these will help you figure it out. Good Luck!

    1.jpg 2.jpg 3.jpg 4.jpg 5.jpg 6.jpg
     
    Yellowheader likes this.
  8. Yellowheader

    Yellowheader Just got it firing! GT Contributor

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    Yes, that's like mine, and it shows the filter attached with a zip tie like John said. Now it all makes sense. Unfortunately I can also see that it will be much harder to get everything in and out with it all bundled together.
     
    scottmastrocinque likes this.
  9. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    It is a real PITA for sure. The engineer that designed this setup needs to have a discussion with me out behind the wood shed. BTW, have an ambulance on standby for him.
     
  10. antmanbee

    antmanbee Just got it firing!

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    This is what I did on my Cal Vin 2007. Other models may vary.
    I modified my set up to some degree by moving the filter outside of the tank. I know this is controversial but I did it for the following reasons.
    The parts needed are the same with the exception of the addition of some extra regular type injection hose and a few more clamps.
    I wanted to make it easier to replace the fuel filter.
    I wanted to make it easier to remove the tank.
    It is a lot easier to get the pump unit in and out of the tank with no filter on the assembly.
    I used Gates submersible hose SAE30R10. Only type rated to be used inside a fuel tank. Gates 27093 $15.92 (1ft) Rock Auto.
    All metal filter Mahle KL145. From Rock Auto. $11.66
    Filter Screen, internal that attaches to the pump inlet. Autobest A0 F1393. This part took me a lot of research to track down a suitable replacement for the difficult to obtain and expensive factory part. I think this part cost about $5-6.
    High quality hose clamps. Got these from Amazon ABA 21014. $13 for 10 pack.
    https://www.amazon.com/gp/product/B00OL264DU/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
     

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