Oil Pump Drive Gear Interchange Model A & B

[WRA]

Folks,

Is there a difference between these for the Model A & B? The different vendors have various descriptions. Some say specific Model A 1928-1931. Macs/Eklers has it listed as a 1928-34.

There are two different part numbers listed. However, none of the vendors provide a measurement or specifications in order to differentiate.

Model A 1928 - 1931 is A-6551

Model B 1932 - 1934 is B-6551

I suspect they are the same, just curious if someone can confirm. Thanks, FordBarn.

 

[rotorwrench]

The part number indicates some change but it was likely minor since the model B oil pump drive, oil pump, and camshaft superseded the model A parts for replacements as listed in the green bible parts catalog. The drive gear part is available in oversizes to accommodate for wear between the camshaft and the drive unit.

 

[Bob C]

The Ford parts book shows B-6551 1928-34. I think all the parts with an A prefix
that were compatible with 1932 vehicles were changed to a B prefix.