How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask cumminsdr Your Own Question
cumminsdr, Mechanic
Category: Medium and Heavy Trucks
Satisfied Customers: 3642
Experience:  All types of Cummins applications
Type Your Medium and Heavy Trucks Question Here...
cumminsdr is online now
A new question is answered every 9 seconds

When fuel tanks hit about half the truck wants to run out of

Customer Question

when fuel tanks hit about half the truck wants to run out of fuel
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Truck Mechanic I'm going to connect you with knows all the tricks and shortcuts.
Customer: its a 2007 mack granite with 2- 50 gal tanks
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: yes , replaced all filters, looked for leaks and cleaned the vents
JA: Anything else you want the truck mechanic to know before I connect you?
Customer: no
Submitted: 8 months ago.
Category: Medium and Heavy Trucks
Expert:  cumminsdr replied 8 months ago.

You may want to have the fuel tanks stand/pick up tube checked inside the fuel tank. A simple crack in the pipe or a bad weld at that level will allow air to be injected and cause your issue. Your best bet will have a dealer look into this . Please don't forget to rate my service

Customer: replied 8 months ago.
I seen the tubes in the tanks and it looks like if you take the plumbing out of the back of the tank the tubing will come out?
Customer: replied 8 months ago.
ok thank you
Expert:  cumminsdr replied 8 months ago.

They will come out than they will need to be pressure tested. Its not an easy task. some cases you must remove the fuel tank.

Expert:  cumminsdr replied 8 months ago.

Hi. Just following up. Please don't forget to rate my service.

Related Medium and Heavy Trucks Questions