Part nubers for brake shoe linings

[Bill Price]

I am the proud (really!) owner of 7ac 226, N81607 (now a 7BCM.) Due to its beautiful green paint job '607 got named "Kermit" somewhere along the way. I am keeping the name.

Kemit has Cleveland mechanical brakes. Can anyone get me a part number for new brake linings (friction material) that Aviation Spruce might recognize? I called them up after looking at their catalog and having no notion as to which reline kit might fit. They didn't know either.

Bill Price

[Mikek]

I am the proud (really!) owner of 7ac 226, N81607 (now a 7BCM.) Due to its beautiful green paint job '607 got named "Kermit" somewhere along the way. I am keeping the name.

Kemit has Cleveland mechanical brakes. Can anyone get me a part number for new brake linings (friction material) that Aviation Spruce might recognize? I called them up after looking at their catalog and having no notion as to which reline kit might fit. They didn't know either.

Bill Price

They are for sale at Wagaero.com p/n#66-5D cat# D-309-000
they want $38.50 per shoe that right 2 required per wheel one per shoe.

You might try a cluch & brake industrial shop but still $$$.

The service manual for the 7AC states that the PN is A3659C & 4-4 Rivets

They will last for a long long time but are you have you removed the wheel and looked
at the linning?? Is the linning worn down to the rivets??

If not you might need adjustment or the wearplate replaced that goes up against the cam. Also the wheel bearing seal might be letting grease to get on the linning/drum.

I think Wagaero is the only one that lists them. 1-800-558-6868

Mikek

[Bill Price]

Thank you very much for the responce.

I have had the brake shoes off. The ones on the left were oily. I sprayed them liberally with brake clean then baked them 4 hoursat 175 degrees F then roughened them up with sandpaper (then sprayed with break clean again.) I also cleaned the inside of the drum with brake clean. All of that helped some but the left break remained less effective than the right one and it is getting worse. The grease seal on the left side looked OK but maybe it isn't. The doober that actuates the break shoes looks OK and moves the shoes when its lever is pulled (where the break cable attaches.) I have tried adjusting the break cable and that doesn't solve the problem.

My plan now is to call Wag Aero and buy shoes and ask them if they have a wheel bearing seal as well.

[Mikek]

Thank you very much for the responce.

The doober that actuates the break shoes looks OK and moves the shoes when its lever is pulled (where the break cable attaches.) I have tried adjusting the break cable and that doesn't solve the problem.

My plan now is to call Wag Aero and buy shoes and ask them if they have a wheel bearing seal as well.

The seal is just a felt ring held between some large thin steel washers might
ask your AP/AI might have the material.

Two other things to check:

The cam arm hooked to the cable might be running out off travel and not
opening the shoes enough to give you holding power due to the wear on
the insert in the shoe end that fits in the cam between the shoes and is
part of the arm, these inserts wear.


The linnig might not be making good full contact with the drum. This can
be checked by putting a littlecoating of black shoe polish on the drum re-
install wheel and apply some brake and turn wheel then remove wheel
and look at shoe linning for black polish should have 50% plus contact.
Look for dark the spots that are showing high spots and with a fine file
or ? shave off very little and check again, do this until you get good
contact.

These brakes should be able to hold for runup power but not much over
that for any period of time.

Mikek