Hi everyone,

I could use some clarification on which wheel cylinder should be used on my front brakes. It's a late year 65 2wd F100 SWB. The shoes measure 11" OD and 2" wide.

The wheel cylinder that came off of it has a 7/8 bore.

The NPD catalog says 7/8" bore. They sent me the parts in a correctly labeled box yet the new wheel cylinder inside measures 5/8" bore.

What's really got me confused is the local Napa guy is swearing left and right that the correct wheel cylinder size is 1 1/16" bore.

Can someone please tell me if the 11"x2" is brake is correct for my truck and what size wheel cylinder should I should have ?

thanks.

 

Another tid-bit of confusion. The front brakes currently on my truck have auto adjusters - a cable running from the top shoe pivot point down the the star wheel.


I notice that the rear drum from a 73 has a 7/8" cylinder and probably has adjusters. I wonder what I have on this truck ?

 

A 73 rear from F-150 has 11"D x 3"W Drum Brake with a 7/8ths Whl Cyl. also has disc brakes on the front, not drums so they have to pick up the stopping power in the rear wheels to compensate & keep in Balance with more efficient stopping power of front disc brake system. The operative word in there is BALANCE

I believe your 11"D X2"W take 7/8ths because they are Front Brakes. Front brakes do 65%-70% of the stopping. Your rear shoes are probably about same width if it's got an OEM 66 rear Axle Assy.

If you had 2.50" or 3.0" inch shoes or a front disc brake conversion, you would req' a larger wheel cyl., but 65-66 F-100 don't come with those big drum brake set ups. They are 2" at best.

FBp

 

It is 1 1/16 as the NAPA guy said. Trust me as I just finished a 2 month complete brake job on my '65. The rears are 7/8 also. When looking for cylinders I had a hard time finding ones that wouldn't leak. The first two manufacturers leaked out of the brake line orifice. However, the cylinders by Wagner matched the ones that came out exactly and didn't leak a drop of fluid.

 

Thanks guys.

Mike - can you confirm that the shoes are 11" by 2" ? I'm a little worried the entire brake is wrong, not just the cylinder. Does yours have auto adjusters on the front ? Mine does and I didn't think they were out yet in 65.

It would be nice if I can just put in the right cylinders and leave the rest of the set up alone. Remember, it originally had 7/8" cylinders.

John.

 

Adjusters are correct all around. First offered: trucks 1964 (cars 1960)

The front cylinders are 1 1/16 for 4 X 2's; ....(1 1/8 for 4 X 4's)

Front brake Shoes: 11 X 2

source: 1964/72 Ford truck parts catalog, (front brakes: section 20.1 .. parts list #2).
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Rear brakes are 11 X 1 3/4, the wheel cylinders are 7/8. (rear brakes: section 22.1, parts list #2)

 

Was busy on the ship all day but you got your answer as that is exactly what was on my truck after subtracting the missing/broken parts inside the drums. Found a '66 hub on Wednesday to match up with my other one so I can now put the drums on as separate pieces rather than as one integral assembly. Sure helps to have a 50 ton press down at the ship for these things. Now I have two spare '65 hubs and drums with all new bearings to store away.

 

You serving in the USN, or restoring some type of ship?


My dad was in charge of de-commissioning CV12 for the first time in Bremerton 1946. Last de-commissioning was in 1980, I believe.

 

Her last de-commissioning was June 1970 at Bremerton. She had a re-commissioning ceremony in August 1998 when she was officially handed over to be a museum. As such she is still inspected by the Navy every year as to her integrity and safety. I've been restoring the interior of the island since 1998 with some time spent on the TBM when I can get my hands on money donations.