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Old 04-05-2019, 07:25 PM   #1
Mini-Skoolie
 
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Year: 2001
Coachwork: Blue Bird
Chassis: International 3800
Engine: DT466E
Help me find my fuel tank switch?

Hello all,
I have a 3800 International DT466E Bluebird school bus. It's six windows, year 2001. I have two fuel tanks, but haven't been able to figure out how to switch from one to the other. Where should I be looking for the control? Thanks
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Old 04-05-2019, 07:36 PM   #2
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Originally Posted by Mat_te_chu View Post
Hello all,
I have a 3800 International DT466E Bluebird school bus. It's six windows, year 2001. I have two fuel tanks, but haven't been able to figure out how to switch from one to the other. Where should I be looking for the control? Thanks
Is it switchable or are they connected and both run out before empty.
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Old 04-06-2019, 01:08 AM   #3
Mini-Skoolie
 
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As far as I can tell it switches, because while the tank sticker said 60 gallons fuel capacity, I could only go through 15 gal of gas before my fuel gauge read empty.
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Old 04-06-2019, 07:27 AM   #4
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Originally Posted by Mat_te_chu View Post
As far as I can tell it switches, because while the tank sticker said 60 gallons fuel capacity, I could only go through 15 gal of gas before my fuel gauge read empty.

Now we're getting somewhere. Very few school buses have two fuel tanks (not to say yours doesn't, but it would be a rarity). In most big trucks these days, there is no switch. The system is designed to simply draw from both tanks at the same time, and the tanks will equalize themselves without any action on your part (many older systems had a cross-over line for this purpose, and even on today's newest vehicles the pick-up tubes serve the same purpose).


Now if you're using 15 gallons before getting an empty reading, I would check the tank to verify it is actually indeed empty. You may be getting a bad reading from a faulty sending unit.


Have you looked and verified the bus actually has 2 fuel tanks, and more to the point, there is actually a select switch? (I would not necessarily expect to find one)
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Old 04-06-2019, 08:14 AM   #5
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Originally Posted by Brad_SwiftFur View Post
Now we're getting somewhere. Very few school buses have two fuel tanks (not to say yours doesn't, but it would be a rarity). In most big trucks these days, there is no switch. The system is designed to simply draw from both tanks at the same time, and the tanks will equalize themselves without any action on your part (many older systems had a cross-over line for this purpose, and even on today's newest vehicles the pick-up tubes serve the same purpose).


Now if you're using 15 gallons before getting an empty reading, I would check the tank to verify it is actually indeed empty. You may be getting a bad reading from a faulty sending unit.


Have you looked and verified the bus actually has 2 fuel tanks, and more to the point, there is actually a select switch? (I would not necessarily expect to find one)
I bought a new to me one ton on propane - two big tanks - first trip I thought I was getting amazingly good mileage until I hit the button to switch tanks and realized that the two tanks fed the system at the same time -- ooops!
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