Model A & B
Ford Garage
Front Brake Operating Pin Comparison
Shown above is a comparison of NOS Model A and Model B front brake operating pins. The pins were unfinished steel as originally produced by Ford. These NOS pins were cadmium plated for preservation/restoration in subsequent years.
The A-2075 pin shown on top was used on all 1928 to 1931 Model A's and is 7.250 inches overall length.
The B-2075 pin on the bottom was used on all 1932 to 1934 Model B's and Model 40/46 and is 7.750 inches overall length.
The operating pins are located inside the front king pins (spindle bolts) and relay the force and displacement from the actuators attached to the spring perch, to the brake shoe roller wedges inside the brake drum.
| Part Number |
Overall Length |
Usage Notes |
|---|---|---|
| A-2075 | 7.250 Inches | 1928-31 Model A Passenger & Commercial 1928-29 Model AA Truck (3-speed) |
| AA-2075 BB-2075 |
? | 1929-31 Model AA Truck (4-speed) 1932-34 Model BB Truck |
| B-2075 | 7.750 Inches | 1932 Model B Passenger & Commercial 1933-34 Model 40/46 Passenger & Commercial |
If anything, the repro suppliers should make the repro pins about 1/32 to 1/16 inch longer than original to compensate for wear in the interfacing cups.
Fifteen degrees to vertical is the approximate lever design angle Ford used. This was done to try to keep the brake rod at 90 degrees to the lever arm for optimal force across the whole operating range during braking and at lock-up.
It is more important that the shoes be adjusted properly and that all the brakes begin to lock up at the same instant.
Minimize the opportunity for variation by addressing worn shafts and bushings, worn clevis holes and pins, worn wedges etc.
Set up the shoes properly, and adjust all four vehicle corners to lock up consistently and concurrently all the way back to the pedal application force.
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April 2004