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
  #1  
Old 09-26-2011, 09:51 PM
gillman.6 gillman.6 is offline
Freshman User
 
Join Date: Jul 2009
Posts: 33
gillman.6 is starting off with a positive reputation.
78 F150 Brakes

I am in the middle of fixing up my 78 F150 and am getting to the brakes. They were always terrible since I bought it and the Brake light remained on. I noticed this weekend that the PO had plugged one end of the combination valve going to the front and ran a short line to a brake hose with two outlets from the other end going to the front. This fed both calipers. The rear was plumbed normal. My question is: did the guy put on the wrong combo valve or the wrong brake hose? I assume there should not simply be a port that is plugged. I have seen diagrams that suggest a center brake hose for my truck and some do not. Thanks for the help. And I wish you could see the amount of silicon this dude used on the motor I pulled.
Reply With Quote
  #2  
Old 09-26-2011, 09:57 PM
fmc400's Avatar
fmc400 fmc400 is online now
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,290
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
You should only have one center hose, and that will feed the rear drums. There should be one port on the proportioning valve that feeds the single brake line to the rear, which then connects to the center rear hose that tees off for both rear wheels.

Each front caliper should have its own hose and line, which go to separate ports on the front of the proportioning valve. Nothing the previous owner did is correct. Either he installed the wrong proportioning valve, or something happened with the old setup and this was his "ghetto-rigged" solution.
Reply With Quote
  #3  
Old 09-26-2011, 10:04 PM
HIO Silver's Avatar
HIO Silver HIO Silver is online now
Post Fiend
 
Join Date: Dec 2009
Location: NorCal
Posts: 10,241
HIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to behold
YOW.

Your proportioning valve thinks that one outlet is plugged. Hence, the brake warning light is engaged. It works but not optimally and there is a reason there are two outlet ports on the combo valve... it was designed and engineered that way. That shadetree fix is, well, just plain wrong....

Danger Will Robinson! Danger! (Yikes!, am I dating myself?)

Click the image to open in full size.

I just pirated the front brakes & suspension from a 78 for my 70 and yeah, there are supposed to be two hard brake lines to the front.
__________________
73 F100 SB, 4x4, 390FE, NP435, NP203,+4 on 35s, 71 F250 LB, 2wd, 360FE, T-18, 70 F100 LB, 2wd, 360FE-EFI, TKO-500, 76K original miles, 01 F-150 SuperCrew Lariat 4x4, 5.4L, 01 PT Cruiser Limited (DD), 71 Pontiac Lemans Sport Convertible, 68 Mustang 200-1v, 65 Mustang 289-4v
Reply With Quote
  #4  
Old 09-26-2011, 10:11 PM
SwOkcOffRoader's Avatar
SwOkcOffRoader SwOkcOffRoader is offline
Posting Guru
 
Join Date: Jul 2003
Location: okc
Posts: 2,360
SwOkcOffRoader has a good reputation on FTE.SwOkcOffRoader has a good reputation on FTE.
proportioning valves are hard to find, most parts stores dont carry them, which is strange because they are wearable parts...but there are a few companies online that started cutting their own out of brass blocks...i installed several on older cars recently with great results....sorry i dont know the companies name, but i found it on google fairly easily...
__________________

Why is there never enough time to do it right the first time, but always enough time to do it again??
....Will work for Rep points....
Reply With Quote
  #5  
Old 09-26-2011, 10:21 PM
HIO Silver's Avatar
HIO Silver HIO Silver is online now
Post Fiend
 
Join Date: Dec 2009
Location: NorCal
Posts: 10,241
HIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to beholdHIO Silver is a splendid one to behold
Quote:
Originally Posted by SwOkcOffRoader View Post
proportioning valves are hard to find, most parts stores dont carry them, which is strange because they are wearable parts...but there are a few companies online that started cutting their own out of brass blocks...i installed several on older cars recently with great results....sorry i dont know the companies name, but i found it on google fairly easily...
Master Power Brakes, Stainless Steel Brakes Corporation, Wilwood, Speedway Motors... NPD carries 'em too..
Reply With Quote
  #6  
Old 09-26-2011, 10:28 PM
SwOkcOffRoader's Avatar
SwOkcOffRoader SwOkcOffRoader is offline
Posting Guru
 
Join Date: Jul 2003
Location: okc
Posts: 2,360
SwOkcOffRoader has a good reputation on FTE.SwOkcOffRoader has a good reputation on FTE.
Quote:
Originally Posted by HIO Silver View Post
Stainless Steel Brakes Corporation

thats who i used, was only a day late of the estimated delivery and they bolted right up...cost about $80...
__________________

Why is there never enough time to do it right the first time, but always enough time to do it again??
....Will work for Rep points....
Reply With Quote
  #7  
Old 09-27-2011, 04:45 PM
gillman.6 gillman.6 is offline
Freshman User
 
Join Date: Jul 2009
Posts: 33
gillman.6 is starting off with a positive reputation.
Thanks for confrming my thought. It is plumbed wrong from the valve to the front. Everything else appears stock. Luckily I didn't drive it much and the valve is correct.
Reply With Quote
Old 09-27-2011, 04:45 PM
Reply

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

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



All times are GMT -5. The time now is 01:26 PM.


Powered by vBulletin® Version 3.7.5
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