1949 C.O.E. questions.
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Junior User
Joined: May 2016
Posts: 63
Likes: 0
From: Freezing Minnesota
1949 C.O.E. questions.
Oh I have many questions. I picked up this 1949 F6 coe down in Oklahoma. The minute I saw it I loved it. It is actually in great shape and it ran. However, the brakes needed attention. I replaced the front brake cylinders and in doing so also had to have custom rubber lines made going to them. No biggie. The master cylinder was junk and leaking so I replaced that. I bled the brakes and adjusted the shoes untill they were just barely dragging and bled again. The problem is, I can pump the brakes and get a hard pedal and it will hold, but when I let off, it goes to the floor when I step on the pedal again. I am now at a crossroads where I decide if the slave cylinder is bad, booster is bad,(the booster sometimes kicks back) or if I should scrap the old master cylinder setup and go with something a little more modern and separated front/rear.
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Junior User
Joined: May 2016
Posts: 63
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From: Freezing Minnesota
I am wondering if there is maybe a check valve or recovery valve in the slave or elsewhere that is not working? Any help from you guys that have been through all this in your restos, would be greatly appreciated. I have a manual on order from ebay and that may help me troubleshoot.
Cargo Master
Joined: Aug 2010
Posts: 2,924
Likes: 134
From: Houston
How are you bleeding your brakes? I have bled brakes with two people, one at the brake peddle and one at each slave cylinder. If you are bleeding solo you are probably not getting all the air out of the lines.
Thanks for posting all the pictures right out of the gate. Nice looking truck.
Thanks for posting all the pictures right out of the gate. Nice looking truck.
Fleet Owner
Joined: Dec 2000
Posts: 25,365
Likes: 5,377
From: Central PA
Welcome to FTE! This is the best Ford Truck Forum on the World Wide Web!
I can't help you with your brake problem but I do know that guys will want to see more pics of your truck and a story about it. Thanks!
I can't help you with your brake problem but I do know that guys will want to see more pics of your truck and a story about it. Thanks!
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Fleet Mechanic
Joined: Feb 2014
Posts: 1,350
Likes: 24
From: Maryland
Your rear brakes should have 2 wheel cylinders. Make sure you are getting brake fluid in the secondary wheel cylinder and air is not trapped. I would bleed the booster too i think it is the problem.
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Hotshot
Joined: Oct 2009
Posts: 16,165
Likes: 4,767
From: Burbank, WA
Welcome to the forum! Cool COE you found. Having a truck that's running and semi-driving puts you farther ahead of many of us here. FYI, in case you hadn't investigated that far, the "Rube Goldberg" vacuum setup on the firewall also actuates the 2 speed rear end unit. Have fun with your project. 
Logistics Pro
Joined: Sep 2014
Posts: 4,920
Likes: 21
From: Bothell & Silverdale, WA
Welcome to FTE. Beautiful truck.
That isn't a Rube Goldberg thing under your hood. It serves a means to supply engine vacuum to shift the two-speed axle (the cable is missing from the dash), to shift the two-speed speedometer transmission, and supply vacuum to the brake booster, which according to your pic is not the original Kelsey-Hayes. My F-6 has single rear brake cylinders.
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Junior User
Joined: May 2016
Posts: 63
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From: Freezing Minnesota
Cool pics. I have not taken the rear drums off yet. The inside dual is marinating in PB Blast. I am pretty sure mine only has one brake cylinder per side. I bled the brakes in this order. Slave cylinder, rt rear, lt rear, rt front, left front. My 2 speed rear end has a cable going to it leading to a red pull **** on the dash.
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Junior User
Joined: May 2016
Posts: 63
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From: Freezing Minnesota
I propped the truck up on jack stands and spun the wheels and adjusted the shoe drag to the drums. Then I ran the truck in first gear. When I get the brake pedal pumped enough to have pressure, all of the wheels stop.
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Junior User
Joined: May 2016
Posts: 63
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From: Freezing Minnesota
Does anyone have pictures of the dual brake cylinder setup? I have not worked on this thing for a week because I am stumped. It has been a learning experience. When I first got the truck last fall, it ran smoothly at idle but sputtered in higher rpms. The carburator was missing gasket material so I sent it to a friend who restores vintage carbs. It turned out awesome but I still had the sputter. Thats when I got my learn on about the loadomatic carb. The plate was rusted and the vacuum advance was unable to move it. BP Blast to the rescue. So now it is the brake problem that stands in the way of trying out the 2 speed rear dif. Just for info, this truck was already converted to 12 volt.
Thread Starter
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Junior User
Joined: May 2016
Posts: 63
Likes: 0
From: Freezing Minnesota
How are you bleeding your brakes? I have bled brakes with two people, one at the brake peddle and one at each slave cylinder. If you are bleeding solo you are probably not getting all the air out of the lines.
Thanks for posting all the pictures right out of the gate. Nice looking truck.
Thanks for posting all the pictures right out of the gate. Nice looking truck.
Cargo Master
Joined: Aug 2014
Posts: 2,594
Likes: 72
From: North Central Arkansas
That is a very nice looking COE! The F4-F6 '48-'52 all have the same brakes, with a single wheel cylinder at each wheel. I believe some of the F7-F8 trucks had dual rear wheel cylinders as well as some of the later trucks. Your booster looks like a Midland booster which could be original to the truck.
Mark
Mark