Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #31  
Old 06-24-2007, 02:33 PM
X36 X36 is offline
Posting Guru
 
Join Date: Jul 2004
Posts: 1,072
X36 is starting off with a positive reputation.
Mil1on On your post (#13) in this thread you show a picture of your truck that you say has not been messed with.Your gas switch is labeled

AUX -on top
Main -on bottom

Then in post (#17) of this thread you say that when your gas switch **** is in the DOWN position your running off the front tank and when your switch is in the UP position your running off the back tank.

Your truck uses the switch just like my dual tank truck does and you've proven my point
In a dual tank set up the rear axle tank is cosidered the Aux tank and the frt tank is considered the MAIN
nuff said
Reply With Quote
  #32  
Old 06-24-2007, 03:24 PM
Mil1ion Mil1ion is offline
New User
 
Join Date: Jan 2008
Posts: 0
Mil1ion is starting off with a positive reputation.
Quote:
Originally Posted by 78f250supercab
[u]
Your truck uses the switch just like my dual tank truck does and you've proven my point
In a dual tank set up the rear axle tank is cosidered the Aux tank and the frt tank is considered the MAIN
nuff said
No, Not Nuff Said ....

You're not understanding what I am saying.

read post # 27 again

My Quote: Not contradicating it all.

It's in the terminology.

You're presuming that the position of the Knob means that tank that is being used.

ie: Knob up means use AUX.. Knob Down means uses MAIN Tank


But,Perhaps FORD is saying with the KNOB one direction OPENS the OTHER tank.

ie: Knob DOWN shows AUX tank use...Knob Up means MAIN Tank use.




I haven't proven your point.
You are assuming that the Fuel Tank KNOB Position is the actual tank in use.

What I'm saying is:

switch **** DOWN does NOT mean REAR Tank..It means Front tank (AUX) tank

switch **** UP means Rear Tank (Main) Tank




The Front Tank being the AUX - Mid-ship tank

The Rear Tank being the Main.


It's like someone reversed the Light switch in your bedroom.

switch UP usually turns the light ON

Switch down usually shuts the light OFF

In the Ford fuel tank switch it is maybe opposite.

Flipping the switch one way Opens the OPPOSITE tank to which the **** is placed.

Last edited by Mil1ion; 06-24-2007 at 03:29 PM.
Reply With Quote
  #33  
Old 06-24-2007, 04:45 PM
Mil1ion Mil1ion is offline
New User
 
Join Date: Jan 2008
Posts: 0
Mil1ion is starting off with a positive reputation.
Further to this discussion.

From the 1973 Owners manul

We already knew that the IN cab tank of those years was considered the MAIN tank

In the 1973 Trucks with dual tanks (In Cab and and what Ford calls Underbody tank.)


If your truck is equipped with the Optional underbody auxiliary fuel tank in addition to the Main tank,the fuel level in either tank is read by moving the the fuel gauge selector switch to the proper position (What does proper position mean in terms of which way the **** goes? )

Fuel flow is controlled by the tank selector valve mounted on the floor to the lewft of the driver's seat.

Illustration to follow.
Reply With Quote
  #34  
Old 06-24-2007, 04:57 PM
Mil1ion Mil1ion is offline
New User
 
Join Date: Jan 2008
Posts: 0
Mil1ion is starting off with a positive reputation.
Now even more specific info from the ford Owners manuals.

Btw, I have these Owners manuals,.

1973
1975
1977
1978
1979

and they all have different terminology and info.

You're going to love this next one from the 1977 book.

Trucks where the AFT tank is considered the Main Tank

1977 100/250 4x2
F350 138',140" and 155" WB

The AUX tank is the Midship tank.

Where the In Cab is considered the MAIN tank

1977 -150/250 4x2 RPO
F350 -136" 160" WB

1977 F150 4x4

Midship Tank is the AUX (except the F150 4x4 which is the AFT axle tank)
Reply With Quote
  #35  
Old 06-24-2007, 09:02 PM
73f350sc's Avatar
73f350sc 73f350sc is offline
Posting Guru
 
Join Date: Jan 2004
Location: Murray
Posts: 1,254
73f350sc is gaining momentum as a positive member of FTE.73f350sc is gaining momentum as a positive member of FTE.
Ok....
Ill chime in on the tank issue now.....

On mine.... that switch on the dash is only to switch between which sending unit is sending the reading to the gauge....I have a valve on my floor with a labled plate stating which tank I am drawing fuel from....

Now then that being said...on my truck....the tank at the very back is the main tank and the tank closest to the cab is the aux. tank. I know this because I re did the fuel hoses one at at time myself and the fuel lines which corrolates to the aux. position on the valve I mentioned earlier go to that tank....and the line that corrolates to the main runs back to the very rear tank.

Originally mine was equipped with all three tanks seat...mid and rear but the seat tank was removed and those lines bypassed.

Long story short.....the aux. tank is the one closest to the cab in the box...and the main is the one closest to the tailgate. Just like in the diagram that Dennis posted from Ford. Anything other arrangement is most likely not stock and has been altered by a Previous Owner.
-Chris
__________________
73 F 350 Super Camper Special
97 Expedition
Proud So-Cal Chapter Member since the dark ages
New Member of the Kentucky Chapter
Reply With Quote
  #36  
Old 06-24-2007, 09:12 PM
shooer's Avatar
shooer shooer is offline
Senior User
 
Join Date: May 2005
Location: southern cal.
Posts: 131
shooer is starting off with a positive reputation.
Nollaig has not posted since the 21st. saying he would fill up the rear tank and see what happens. Main... aux...who cares as long as YOU know which tank the guage is reading on YOUR truck.
As to nollaig's original post, I can think of only two reasons the pump works on one tank and not the other.One,as mentioned before,a crack in the hose preventing suction from that tank.or just as likely,a faulty switching valve stuck on the front tank.
It's possible to be reading the guage for the rear tank but the valve is stuck on drawing from the front tank.
Am I missing something?

Don
Reply With Quote
  #37  
Old 06-24-2007, 09:33 PM
Mil1ion Mil1ion is offline
New User
 
Join Date: Jan 2008
Posts: 0
Mil1ion is starting off with a positive reputation.
Quote:
Originally Posted by shooer
Nollaig has not posted since the 21st. saying he would fill up the rear tank and see what happens. Main... aux...who cares as long as YOU know which tank the guage is reading on YOUR truck.
Don
well see it is important to lots of people and it causes discussion here every once and a while.

People need to know which tank is being used ....to which way the switch **** is positioned.

I will be scanning and posting the Owner's Manuals info sometime.
Reply With Quote
  #38  
Old 01-01-2013, 09:09 PM
Pbrvic0127's Avatar
Pbrvic0127 Pbrvic0127 is offline
New User
 
Join Date: Dec 2012
Posts: 7
Pbrvic0127 is starting off with a positive reputation.
Hmmm I can't understand the logic of if the rear tank is the main why is it smaller than the middle? I recently acquired a 1978 c/s f250 and pulled the tanks today and assumed the bigger tank was the main. But I guess common sense is overrated! On that note I was on Lmc truck looking up tanks and they really didn't seem to show a duel tank option? Any suggestions where to start looking for a rear tank?
Reply With Quote
  #39  
Old 01-01-2013, 09:22 PM
mikeo0o0o0's Avatar
mikeo0o0o0 mikeo0o0o0 is offline
Post Fiend
 
Join Date: Apr 2009
Location: Davenport, Fl
Posts: 9,841
mikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to behold
Rear tank is the main tank, mid-ship is the auxilliary. Here's a page from the ('73) Ford owner's manual.
Attached Images
 
Reply With Quote
  #40  
Old 01-01-2013, 09:28 PM
Pbrvic0127's Avatar
Pbrvic0127 Pbrvic0127 is offline
New User
 
Join Date: Dec 2012
Posts: 7
Pbrvic0127 is starting off with a positive reputation.
From what I previously read on this thread it changed after 77? But I see that is a three page argument
Reply With Quote
  #41  
Old 01-01-2013, 09:29 PM
mikeo0o0o0's Avatar
mikeo0o0o0 mikeo0o0o0 is offline
Post Fiend
 
Join Date: Apr 2009
Location: Davenport, Fl
Posts: 9,841
mikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to behold
LMC does have dual tanks, midship tank is on pg 38, rear tank is listed on page 39.
Page 39 also lists a 38 gallon rear tank.
Reply With Quote
  #42  
Old 01-01-2013, 09:30 PM
mikeo0o0o0's Avatar
mikeo0o0o0 mikeo0o0o0 is offline
Post Fiend
 
Join Date: Apr 2009
Location: Davenport, Fl
Posts: 9,841
mikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to behold
Best argument offered is when a truck was ordered without an auxilliary tank, it came with the rear tank.
Reply With Quote
  #43  
Old 01-01-2013, 11:01 PM
Dasher400's Avatar
Dasher400 Dasher400 is offline
Senior User
 
Join Date: Jun 2012
Posts: 101
Dasher400 is gaining momentum as a positive member of FTE.Dasher400 is gaining momentum as a positive member of FTE.
Sorry Mike, I hate to argue but 78's are special. These came right out of my '78 manual...


Click the image to open in full size.

Click the image to open in full size.

Last edited by Dasher400; 01-01-2013 at 11:07 PM. Reason: Extra pic, grammar
Reply With Quote
  #44  
Old 01-01-2013, 11:11 PM
mikeo0o0o0's Avatar
mikeo0o0o0 mikeo0o0o0 is offline
Post Fiend
 
Join Date: Apr 2009
Location: Davenport, Fl
Posts: 9,841
mikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to beholdmikeo0o0o0 is a splendid one to behold
Quote:
Originally Posted by Dasher400 View Post
Sorry Mike, I hate to argue but 78's are special. These came right out of my '78 manual...
No need to argue, I stand corrected . That makes two new things I learned today.
Reply With Quote
  #45  
Old 01-01-2013, 11:18 PM
dlburch dlburch is offline
Elder User
 
Join Date: Jul 2005
Location: Overland Park, KS
Posts: 502
dlburch is gaining momentum as a positive member of FTE.
and in '79 they marked them "Front" and "Rear"! (finally)
Reply With Quote
Old 01-01-2013, 11:18 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks

Tags
1977, auxiliary, auxliary, buy, e150, ford, front, fuel, gas, main, mainaux, rear, selector, solenoid, switching, tank, truck, valve

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel pump or maybe an issue with the fuel tank? Krisverde 1987 - 1996 F150 & Larger F-Series Trucks 15 04-28-2014 05:47 PM
96 f-250 tank switching problems trip1040 1987 - 1996 F150 & Larger F-Series Trucks 15 02-05-2014 01:02 PM
Fuel from rear tank only tkisling 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 10 12-25-2013 09:47 AM
Strange problem with dual gas tanks. Phobia16V 1987 - 1996 F150 & Larger F-Series Trucks 29 02-06-2013 10:33 PM
Why do I keep running out of gas? 86'F-150 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 84 01-22-2013 10:33 PM



All times are GMT -5. The time now is 09:04 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup