Thorp Air Command - T18.net

Guys,

I replaced my brake pads this past week and noticed that there are two shims about 3/16" thick for each assembly. With the brake caliper piston fully compressed it occured to me that the total shim thickess was too thick. I replaced one shim with a 1/8" shim on each side along with slightly shorter bolts. My though logic was that with shorter bolts and less shim thickness the assembly would be stiffer and the piston supported better due to less protrusion from the caliper. Does anyone see any flaws in my logic or potential risks down the road?

Thanks,

Jim Mantyla

Jim: You may not have seen the 2 references below. They list:

Remove back plate attaching bolts and washers, and remove back plates,
shims, and insulators (if applicable).

Install insulator shims (typically used with metallic lining) and spacers as applicable.
http://www.cessnat50.org/media/manuals_ ... veland.pdf

http://www.myrv10.com/tips/maintenance/ ... e_2009.pdf

In the 2 references they provide break in procedures. Note the tail dragger caution.
They discuss to ensure the cylinder must be able to move in the torque plate freely.
The 1st reference list a minimum stack up If linings are still usable or are replaced, measure the cumulative thickness of two linings, disc, and pressure plate as shown in Figure A1-1. If the stack measures less than 1.00 (1-inch) with good linings (linings above .100 inch), the brake disc is considered below minimum wear thickness and should be replaced.
My only observation: With less shim, the brakes will most likely come on sooner and possible have brake drag (lining staying in contact if not enough clearance) upon release.
With new linings and a serviceable disc and free moving cylinder you should be okay.

_________________
Victor J Thompson
C-GIRQ
"In Memory Of Dad"