Mushy brakes

RandyArizona · #1 12-29-23, 04:10 PM

Quote:

Originally Posted by Rick Erwin

Does anyone have any idea as to what the normal brake pressure should be when fully applying pressure to the pedals?

Rick,
Hope your "Peak" was good.
The normal brake pressure number is listed somewhere, on some Cessna Geeks desk......... As for what it is, I guess my answer would be, "enough to stop the plane".
I'm sure someone could figure it out, , hose length, hose ID, master cyl., diameter, and length of throw, pressure to master cyl piston.... etc. etc...
You get the point...
Have a good new year, up coming.
Regards,
Randy

RandyArizona · #2 12-29-23, 04:19 PM

Here is the cleveland wheel and brake cross page for the early D model aircraft.
(everyone else can insert their model, and get the data.)

https://www.aircraftwheelandbrake.co...+thru+337-1193

It shows 30-61D
With exploded view, the AMM which I referenced earlier, and a Tech service guide manual.

Good luck.
Regards,
Randy

Rick Erwin · #3 12-29-23, 06:36 PM

Hi Randy! My last 4 “peaks” have been the best out of the last 35 years! I hope you have a great New Year!

Rick

Joes · #4 12-30-23, 11:47 AM

Rick, I’ve owned a couple of the 6 in wheel versions of the 337’s and the stopping power of these are marginal at best. Can’t comment on the larger diameter wheel option. One things for certain it’s difficult or nearly impossible to flat spot the 6 in version. Regards, Joes

Rick Erwin · #5 12-30-23, 12:03 PM

Thank you, Joes. My G model has the larger main wheels, and the stopping power is certainly adequate. I was asking about the brake pressure as I was wanting to pressure test a swivel fitting. I put a pressure gauge inline at the left brake caliper and all I could get out of it was about 4-500 PSI. I took the swivel fitting to 1750 PSI and no leaks, so I think it should be good to go.

Rick

Joes · #6 12-30-23, 01:08 PM

Just do a visual if there is no fluid leaking .... no pressure loss. BTW could you lock up the wheels on the larger version, not that you would want to. What is the diameter of the brake rotor and wheel on the larger version.

Rick Erwin · #7 12-30-23, 11:41 PM

Joes, the swivel fitting was already out for a rebuild and I wanted to pressure test it prior to reinstall, it held 1750 PSI for 24 hours. While I have not tried to lock up the brakes, I think I could. The optional large tire is an 18x5.5. I’ll be back at the plane on the 2nd or 3rd and will measure the brake disc for you then.

Rick