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EFV-8 Club Forum / Light Commercial Truck Discussion / Ford F-1 and F-100 front brakes

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Posted By Discussion Topic: Ford F-1 and F-100 front brakes

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juergen
11-18-2011 @ 11:08 AM
Member
Posts: 254
Joined: Jan 2010
          
Is there any difference in the front hubs, backing plates or drums between the F-1 and F-100 truck? How can you tell which is which?

supereal
11-19-2011 @ 11:50 AM
Senior
Posts: 6819
Joined: Oct 2009
          
My books show the early type trucks, the F-1, with the Lockheed-style brakes and the cam type adjusters, while the F-100 shows the Bendix-type, with the star wheel adjusters. If so, the brake assemblies would not be interchangable. You can check with brake specialists, such as MT Car Products (www.mtcarproducts.com), or consider upgrading your truck with front disc brakes. Chassis Engineering has kits (www.chassisengineeringinc.com). Swapping brake parts and systems requires good advice to ensure safety. If you are not a purist, disc are the way to go, as trucks rely mostly on the front brakes.

51f1
11-19-2011 @ 5:30 PM
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Posts: 573
Joined: Oct 2009
          
Not much. The F1 and F-100 through 1948-1955 had, essentially, the same Bendix type brakes. Whether all of the parts are interchangeable, that would take some research. The brake shoes, front and rear, were used at least 1948-1967. The front brake drums were used 1948-1952. The rears were used from '48 through the '50s. Front hubs were the same 1948-1952 and 1953-1956. Backing plates were the same at least 1948-1956. Looks like the only parts that you have to identify are the front brake drums.

Richard

juergen
11-20-2011 @ 3:54 AM
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Posts: 254
Joined: Jan 2010
          
Thank you both for trying to solve the mystery.

This is intended for a 1950 F-1 to be restored. Glad to read that the backing plates/brakes are the same. The hubs and drums are different. I just found in the C&G catalog that the brake drums are the same for 48-52 and different for 53-63.

Could it be that the hub and drum is integral for one style and separate for the other? And if so which is which? Or I'll give C&G a call.

Again thanks for your help

51f1
11-20-2011 @ 6:58 AM
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Posts: 573
Joined: Oct 2009
          
I have attached a copy of the hub dimensions. You are interested in the 8C and the B3C for the '48-'52 and '53-'56, respectively. This is not the best copy, but you can probably read it if you make it bigger. Dimensions "A" and "F" are different.

http://i250.photobucket.com/albums/gg264/rcrispd/fronthubdimensions-1.jpg

Richard

This message was edited by 51f1 on 11-20-11 @ 7:03 AM

juergen
11-20-2011 @ 9:39 AM
Member
Posts: 254
Joined: Jan 2010
          
Richard,

With your sheet I thought I finally had the answer. Trouble is my single flange hub does not look at all like the single flange hub in the diagram. I've included a picture of my hub.
My hub sets the brake drum on the outside. The dimension F in the picture looks like the point where the brake drum sits but it's on the inside of the hub. My brake drums' holes match the 2 7/8 hole dimension for F. The overall hub length is 4 11/16.
Is the picture representative of a F-1 single flange hub?

trjford8
11-21-2011 @ 9:15 AM
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Posts: 4203
Joined: Oct 2009
          
In my experience the 48-52 F-1 front hub has a different offset than the 53-56 front hub.Therefore the drums are diffeent due to the offset difference.

juergen
11-21-2011 @ 11:40 AM
Member
Posts: 254
Joined: Jan 2010
          
Thank you all. I think I have figured it out with your help. While several F-1/100 repro suppliers say the wheel cylinders and brake drums are the same, others do not. MACs shows the difference in brake drums as you described, trjford8. The F-1 looks more like a bowl with the drum further down from the mounting flange than the F-100 style. They also show that the F-1 wheel cylinders are stepped versus the straight through kind used on the F-100 and following years.

That also explains the single flange schematic that Richard provided in his attachment. The brake mounting flange is forward of the hub on the F-1 versus about half way down the hub on the F-100 as seen in my photo. The schematic is more representative of the F-1. My back of the hub is over 3 1/4 inches as shown in the schematic for the B3C (53-56 truck).
So while the F-1 and F-100 front brakes are said to be compatible, one better not mix hub and drum parts.
Thanks to all who responded.

This message was edited by juergen on 11-21-11 @ 11:42 AM

51f1
11-22-2011 @ 11:47 AM
Senior
Posts: 573
Joined: Oct 2009
          
F-1 wheel cylinders are not stepped. Stepped cylinders were used on some of the larger trucks. All were straight through bore except the step type used on the '48-'50 and early '51 F-2 front and rear and on the F-3 front. All of this is in the Ford Shop Manual. Also, I have rebuilt F-1 cylinders and installed new ones, so I have seen them myself.

Richard

This message was edited by 51f1 on 11-22-11 @ 1:58 PM

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