Works on one fuel tank, not the other

[Construction]

My passenger side tank works fine. I switch to the drivers side tank, it runs 5+ minutes, then shuts down. Switch back to the other tank, it takes a while, then it restarts and runs fine. The lines to the drivers side tank are new. Not sure what to try next.

 

[doghead]

Maybe the lines are not correctly connected to the valve.

 

[Construction]

Yes, it is a M817 Dump Truck. I'll double check to make sure the lines are connected properly.

How can I tell where I am getting air on that side?

 

[Construction]

No, really. Will it leak fuel? Hiss? What are the signs so I can use the process of elimination?

 

[73m819]

try by passing the selector valve. also put a air hose in the offending tank, put some rags around the hose to seal it, apply some air, you will see a fuel leak at the place its sucking air

you said the lines on the offending side are NEW make sure that two lines are not CROSSED ie the return line to the draw and the draw going to the return, if this is so, the truck will NOT run on that tank

 

[Construction]

Just rechecked, the fuel lines are connected properly.

Thanks for the advice.

 

[doghead]

Then you either have a bad hose or line or connection, or valve seal. (my guesses)

 

[73m819]

"try by passing the selector valve. also put a air hose in the offending tank, put some rags around the hose to seal it, apply some air, you will see a fuel leak at the place its sucking air"

 

[M813A1]

also check that you turn your selector switch on the dash to the correct side to turn on the pump for that sidee and check the pick pump in the tank

 

[cranetruck]

For non-owners of these truck (me), here is a diagram.....so it's manual, should be pretty fool proof, the solenoid type systems with check valves, in-tank pumps etc could be a lot worse to troubleshoot.

 

[Floridianson]

also check that you turn your selector switch on the dash to the correct side to turn on the pump for that sidee and check the pick pump in the tank

No pumps in tanks

 

[Construction]

I have not pulled the suction line from the tank yet to check it. I will drain the tank, pull it, inpect the suction line. It is the only thing I have not done.

 

[YankeeDuece]

It runs 5+ minutes because that is all the fuel availale in the fuel filter canister.
You may have a hole or blockage in the drafting tube in the tank or the fuel selector switch is in the wrong position. Turn the selector switch full counter-clockwise as veiwed from the drivers seat. This is the off position. The center bump on the switch is the drivers side tank and full clock-wise is the passenger side. The switch on the dash is for changing the fuel guage readout.

Good luck.....I am going through the same problem.

 

[pa.rich]

OR in my case the guy I bought mine fom, said not to use the rite side tank- its rusty. Yeah rite, the pump and lines were missing.

 

[wreckerman893]

Me and Tony Wright had the same problem trying to recover his wrecker and I had the same prob with my wrecker.
I bypassed the selector switch and replaced the fuel filter with a spin on (the replacement filters are over 50 bucks each at NAPA).
My gut feeling is that the seals in the manual selector switch dry out and allow the air to enter.
I only run on the drivers side tank but unless you are going a long way it won't matter. You can still use the other tank for storage and pump it over with a transfer pump.
I found there was a lot of crud in both my tanks so a good cleaning is in order in addition to checking for leaks.

 

[Construction]

Thanks.

 

[timntrucks]

crud in the tanks.. that stuff you run WM would eat up most crud. haha

 

[Construction]

It runs 5+ minutes because that is all the fuel availale in the fuel filter canister.
You may have a hole or blockage in the drafting tube in the tank or the fuel selector switch is in the wrong position. Turn the selector switch full counter-clockwise as veiwed from the drivers seat. This is the off position. The center bump on the switch is the drivers side tank and full clock-wise is the passenger side. The switch on the dash is for changing the fuel guage readout.

Good luck.....I am going through the same problem.

My manual selector on the floor is marked for the passenger side at full clockwise, but at full counter clockwise it is marked for the drivers side tank, not off. I did not realize there was an "off" position. So you are saying at 45 deg. is the drivers side tank? I am not with the truck right now to confirm, but will be tomorrow morning.

 

[doghead]

There is a picture in the -10 TM.

 

[Construction]

There is a picture in the -10 TM.

What is the -10TM?