Info needed: F60S LAAT Wheel Cylinder size

[Jacques Reed]

Hi Mark,

This may point you in the right direction:

From 1943 Maintenance Manual:

"On models equipped with 4 7/8" steering ends:
The front brake drum dimensions are- Diameter 14", Width 2".
The rear brake drum dimensions are- Diameter 15", Width 3.5".

"On models equipped with 6" steering ends:
The front brake drum dimensions may be either 14" x 2" or 15" x 3.5"
Rear drum dimensions 15" x 3.5"

Logic would indicate that if the front drum dimensions are the same as the rear they would use the same size cylinders- 1 1/2" instead of the 1 3/8" used on the 14" x 2" drum.
I doubt if 1 3/8" cylinders would work with 3.5" wide brake drums. The distance from the centre of the pistons to the backing plates is less than with the 1 1/2" cylinders so they would not line up with the center of the brake shoes.

Will leave it to someone who has 15" x 3.5" drums on their 6" steering ends to confirm this.

As a matter of interest, what size are the front drums on your F60-S?

Cheers,