Fuel primer bulb collapsed S 750

[TB]

I have an S750 that was starving for fuel. I opened the door and saw that the bulb was collapsed. I've read enough forum comments to recognize that I may have a plugged supply line or pickup screen. I was surprised when I went to look at Bobcat Parts catalog that there does not seem to be a pickup screen in the S750. I wasn't aware that some (apparently all of the new ones) don't have that screened pickup. I removed the supply line from the bulb and was able to get air in it. I tried sucking fuel with no success. Concerned that I would blow off the screen (remember I wasn't aware that some don't have screens), I held the compressed air gun a few inches away from the hose and tried to get what ever was plugging up the line loosened up. When it (not sure what IT was) broke free, fuel flowed freely. So.. all of that preface to ask....

1. Did I solve the problem? Did something get dropped in the fuel tank, large enough to get sucked into the pickup tube or did I screw up and blow off the screen? (that doesn't appear on the bobcat parts catalog for SN A3LJ36XXX? I ran the loader for a short time without any apparent issues.
2. Is there a way to suck fuel and debris from the tank (assuming something is still in there that can get stuck again), without removing the tank?

 

[brdgbldr]

I have an S750 that was starving for fuel. I opened the door and saw that the bulb was collapsed. I've read enough forum comments to recognize that I may have a plugged supply line or pickup screen. I was surprised when I went to look at Bobcat Parts catalog that there does not seem to be a pickup screen in the S750. I wasn't aware that some (apparently all of the new ones) don't have that screened pickup. I removed the supply line from the bulb and was able to get air in it. I tried sucking fuel with no success. Concerned that I would blow off the screen (remember I wasn't aware that some don't have screens), I held the compressed air gun a few inches away from the hose and tried to get what ever was plugging up the line loosened up. When it (not sure what IT was) broke free, fuel flowed freely. So.. all of that preface to ask....

1. Did I solve the problem? Did something get dropped in the fuel tank, large enough to get sucked into the pickup tube or did I screw up and blow off the screen? (that doesn't appear on the bobcat parts catalog for SN A3LJ36XXX? I ran the loader for a short time without any apparent issues.
2. Is there a way to suck fuel and debris from the tank (assuming something is still in there that can get stuck again), without removing the tank?

You may still have a problem since whatever plugged the inlet is still in the tank.

You may want to pull some fuel from the tank one put it in a glass jar to see if the fuel is contaminated.

The parts catalog shows that you do have a fuel tank drain. It is a very messy job but doable. Just try to have as little fuel in the tank as possible before trying to drain it.

 

[laurencen]

to suck tank dry (not for Gas) take a 20L pail, drill the top for a hose tightly and put one end of hose in tank the other in the pail, drill a 1 inch hole again in the lid, use a shopvac to suck the pail then it will empty the tank, if more than 20L (5gal) empty pail and start again, this way will also suck up debris smaller than the hose diameter.

 

[hoardac]

Yeah I had to clean my tank out because of crap in it. I replaced the lines and bulb just because I had the tank off figured it was a good time to start new.

 

[emilyjohnson85]

It sounds like you've partially solved the problem by clearing whatever was blocking the fuel line. If your Bobcat S750 doesn't have a pickup screen (as indicated by the parts catalog), then you likely didn't blow one off. The blockage could have been caused by debris or sediment in the tank that got sucked into the pickup tube. Since the fuel is flowing freely now, that blockage has been removed.

To prevent future issues, it might be a good idea to try siphoning or vacuuming any remaining debris from the tank. One method is to use a fluid transfer pump with a thin hose that can reach the bottom of the tank. This can help remove any potential obstructions without having to remove the tank.

 

[ByggareBobby]

IF there was a pick-up screen on your pick up hose it probably had one of those small metal balls inside of it that prevents back-flow i.e. you can only suck gas out from the tank and not push it back into the tank. If ever one blow compressed air into that suction hose with a pick-up screen filter w. a "back-flow ball" you probably will shoot the screen off the hose and down the tank bottom. By the way, in my old 643 I had two different pick-up screens rattling around lose in the bottom of my gas tank. One with that back-flow "ball" and the other without it. I dismounted my gas tank and cleaned it out. Lots of other debris inside(!) but I guess the 643 tank is easier to access than yours?