View Full Version : What brake is this?

02-16-2010, 11:59 AM
Can anyone identify what manufacturer (and hopefully model) brake caliper this is? There is a hairline crack near one of the studs so I need a replacement, but it has no markings that I can find. It's off a PA22-108, but mine has had both the tailwheel and dual toe brake conversion and I believe there were options to swap brakes on those STCs. The logs aren't clear if they were changed or not.

02-16-2010, 09:35 PM
I have the stock Cleveland disk brakes on my Colt, and they don't look like that. My calipers have only one piston. Sorry to hear about the crack. Brake parts are big bucks. I might know someone who can help you. Send me an email and I'll send you his contact info. He has a lot of used brake parts.

Steve Pierce
02-17-2010, 06:35 AM
I don't recognize your caliper. The fitting in the middle of the caliper is odd to me. I will look in my parts catalogs and see what I can find.

02-17-2010, 12:22 PM
Cleveland 30-12 or 30-13 - SCB

02-17-2010, 01:42 PM
Airwrench; One thing I know for certain in this World is that I do NOT know everything! That doesn't mean, however, that I refuse to raise my hand in an effort to learn, when the opportunity presents itself...

Not only am I totally unfamiliar with this type of Cleveland brake assembly, I cannot locate any reference to either a Cleveland 30-12 or 30-13 brake assembly designations (this COULD BE because all the "product listings" that I have archived are TSO'd aircraft parts "only"???) that you have called out. Could you PLEASE provide for me some kind of document reference number, or even a link to wherever this stuff might be found? I have a rather LARGE bunch of Manuals, Product Listings, et c of all manner of Cleveland and/or Parker-Hannifan (and a lot of other "piece/parts" found on airplanes of this "vintage"), and would like to supplement them with any/all information I do not have.

I'm a little surprised that there is "no reference" in the aircraft records to the installation of these parts, AND...I consider myself pretty well familiar with "conventional gear conversion" STCs -as well as brake mod STCs (not to mention G-A OEM manufacturers in general)- and these brake assemblies are "foreign" to my experience. Can't HAVE THAT, ya hearin' me? Thanks for any info you might provide!

I had these brakes "made" as some kind of "Third Party" aftermarket parts, but have not as yet been successful in pinpointing who built them. As Steve noted...I, too, have never seen a Cleveland [light aircraft] caliper design with a "center-tap" for incoming pressure line attach. Thusly, I am "intrigued". All the Clevelands I've ever seen had "opposing inlet/bleed tappings" that could be said to pass "across the width" of the caliper housing, along with a large "mass" cast in to beef up the housing directly behind the piston area(s). What "type" aircraft had these brakes???

"The day you stop learning is the day you died."

02-17-2010, 02:28 PM
The current part numbers are 3000-250 (30-12) and 3000-500 (30-13) and they are listed in the Cleveland product catalog available for download.


02-17-2010, 02:29 PM
Sounds like I've posted quite the conundrum! I wasn't trying to break new ground here, honest, just wanted me brakes fixed! *sheepish grin*

The aircraft in question is a 1960 Piper Colt. Very early in the prodcution run. Actually, the tenth Colt to leave Lock Haven back in Nov 1960 (serial number 22-8011). Like all Colts it started life as a tricycle gear, but was converted to tailwheel and given the dual toe brake STC. I do know that the latter had the option of upgraded brakes as well, but it sounds like these aren't even them. The application of the dual toe brake STC is present in the logs, but it doesn't mention if the brakes were changed at the same time.

Wish I could tell you more, but the shop has my logs right now.

02-17-2010, 02:54 PM

Aviall catalog #59 Page 1846 has that brake. The housing is part # 091-00400 for the 30-12 or 091-00500 for the 30-13.

It is an interesting brake assembly. That center fitting between the cylinders is listed as a retract cylinder. I have personally never seen one of these either. If it were me, I would make dang sure these things were installed legally... You may wind up having to buy a new set just to get your airplanes paperwork correct.

John, I recommend getting an Aviall catalog and source book... This thing is full of stuff like this.
Aviall's number is 1-800-284-2551


02-17-2010, 03:11 PM
I'm with Brian on making sure the installation is legal. I don't recall seeing those part numbers ever associated with shortwings. The standard Cleveland Conversion Kit STC uses 30-60A and the original Colt disc brake option was the 30-18. I don't know what the Williams or Univair STC's call for. Maybe someone with the paperwork will share the information. Given the airframes that brake is listed for you should have been getting lots of braking action.


02-17-2010, 03:23 PM
AHHH! So easy working in THAT direction!!! There the obsolete p/ns are, right there, in parenthesis, in the Index! (...and yet, so difficult to "dig out" with only the obsoleted p/n!). But... doing a "Find" in the pdf document only scares up the 3000-xxx numbers! Well, I can't fault Airwrench for that...his was good info. I just didn't persevere enough, I guess. Never woulda believed that P-H didn't call those numbers out in the PA-28 listing, but only in the Index od p/ns. Thanks, Jeff! Wish I could edit the notes section of the pdf manual! I actually looked there first, since it's in my "Airplane Parts Manuals" file. Now there's a .odt "notes" file in a folder along with that Manual.

Well, I STILL can say I don't recall ever seeing that pressure feed line config, but I must have, I'm sure...guess it never "stuck with me"! Then, too, I have changed my fair share of PADS on PA-28s over the years, but I never "fully restored" a Cherokee, right down to the calipers!

Ah well, learned something today...good to go until tomorrow!

02-17-2010, 03:44 PM
You are ahead of me JohnW. I looked at drawings in the catalog until I saw one that matched the pictures. Wouldn't you know it... it was the very first page of the dual piston brakes! ;)

02-17-2010, 04:00 PM
I May have seen this brake on a Comanche..? It may be possible Piper done it on that early Serial number

02-17-2010, 04:13 PM
I May have seen this brake on a Comanche..? It may be possible Piper done it on that early Serial number

You are correct. The product catalog lists the PA-23, PA-24 and PA-25 as having those brakes.


02-18-2010, 09:26 AM
While we are talking about brakes, (not meaning to hijack the thread), my Colt brakes are supposed to have a spacer between the caliper and back-plate according to the parts catalog. I haven't been able to find the spacers anywhere and mine were missing when I got the airplane. I made one for each side but it would be nice to have the proper part. Has any of you ever seen these spacers and do you know where I could get a couple? Thanks,

Steve Pierce
02-18-2010, 04:48 PM
I think it is a 68-4 shim. I checked a few vendors and no luck.

02-18-2010, 07:09 PM
Thanks Steve. I made two of them and they work ok. I'll keep looking though. I'd like to put the original parts on if possible.