Brakes rebuild

[Mooney-Shiner]

Hi guys,

My brakes need to replaced.

We pulled everything apart and discover two interesting things:

1. L/H brake piston is stuck in the caliper. So I'm planning on taking it to machine shop to see if anything can be done. Otherwise, its BAS/TexasSalv/J-Pressley time.

2. L/H pressure and backing plates have 3 rivet holes as opposed to R/H hardware that has two holes. Looking at the IPC, I can see that the illustration shows 2 hole assy. According to IPC, the parts I need are 74-10 (plate assy, backing), 64-15 (plate), 73-11 (plate assy, pressure) and 63-12 (plate, pressure).

 

Should I just assume that 3 hole assy can from entirely different aircraft and has to be replaced? What would be a good source for replacement?

Any other thoughts are welcome.

P.S. Planning to do donuts ( cure date 12/67!) on my mains while re-building the brakes.

 

 

[Jim F]

You can reinstall the caliper on the hydraulic line and step on the brake pedal.  It will push the puck out.  Its going to make a mess.  Once the puck pops our removed the hydraulic line and cap immediately.  You don't want air in the system.   

When you put it back together add some hyd fluid to the caliper and slide the puck in hold the fitting at the top.  Push the puck in and keep tapping the housing.  The idea is to make sure there is NO air in the puck.  You will need the puck to still have about an 1/8 of an inch to go till flush.  Reattach the brake line loosely and press the puck in till flush while wiggling the caliper to brake loose any air bubbles and tighten the fitting.  If done properly you should not need to bleed the brakes.

[Kelpro999]

Two rivets vs three doesn’t matter if yours calls for two, just not the other way around.

[N201MKTurbo]

Wrap the cylinder in a rag, put your air gun on the fitting and pull the trigger. The puck will come right out. The rag is to keep you from getting sprayed with 5606 and to catch the piston.

[Planegary]

Spray around the puckand after letting it set hit the hydraulic fitting with an air nozzle and maybe you can pop the puck out

[PT20J]

The IPC you posted lists the brake cylinder assy as a 30-5 or a 30-56A depending on aircraft serial number. The 30-5 uses three rivet linings and the 30-56A uses two revet linings. Mooney often only shows one variation in IPC drawings. 

You really shouldn't have two different brakes installed on the same airplane. 

[PT20J]

According to the Parker Cleveland Product Catalog, the 30-5 is obsolete and replaced by the 30-56A. If it were mine, I’d look for a used serviceable 30-56A.

[Mooney-Shiner]

11 hours ago, PT20J said:

The IPC you posted lists the brake cylinder assy as a 30-5 or a 30-56A depending on aircraft serial number. The 30-5 uses three rivet linings and the 30-56A uses two revet linings. Mooney often only shows one variation in IPC drawings. 

You really shouldn't have two different brakes installed on the same airplane. 

Thank you, Skip. This is the exact answer that I was looking for! 

[Gee Bee Aeroproducts]

Off topic 

For the Beech models pre 1963

I sell a complete, I will be doing complete 

backplate

wheel

caliper

in the 8 version with tso later this year

since 1982 , supporting the fleet

GB

 

[jamesm]

1 hour ago, Gee Bee Aeroproducts said:

Off topic 

For the Beech models pre 1963

Did you mean Mooney ? or in the future you are planning Mooney refurb kit or??

 

[Gee Bee Aeroproducts]

Just now, jamesm said:

Did you mean Mooney ? or in the future you are planning Mooney refurb kit or??

 

I won’t touch the Mooney market as low volume, when I do a group buy on the beech market it’s a huge order .

Failure to buy new parts and there will be none made , lack of stocking dealers and service providers.