Re: Cleveland PT brake installation - conclusion

ccmueller001 · Post by **ccmueller001** » Wed May 27, 2015 3:33 pm

'Several of you have helped me with information of the Cessna 310 brake installation on my PT-26. Thank you all!
I've posted a couple photos in the album N69167 (there are 2 albums with that title).

Braking is smooth with no tendency to grab. Now have much more positive control. The new tires are softer than the 25+ year old ones previously on it so it is harder to roll now. Guess I'll have to start using a tug to get it back into the hangar.

Installation went okay. Bit of a chore to move the axle out 1/4" and rotate it 90 degrees and re-drill for the thru bolt. Removal of Hayes system was simple, and installation of Cleveland brake support plate was a bolt-on operation. Ended up using a -4 hose as the Cleveland brake end uses AN816-4 nipples (with O-ring under the nipple). There wasn't much clearance for a 90 deg angle so I had hoses made with a 90 deg female end to attach to the brake end nipple. Used an AN919-3 reducer to hookup the other end of the hose with the airframes -5 tubing.

Using DOT-5 fluid. Soaked samples of all O-ring in DOT-5 for several day and found no swelling. The rubber pistons in the master cylinders needed the DOT-5 fluid as 5606 fluid resulted in swelling. Added DOT-5 labels to master cylinders and fluid reservoir.

Still have some brake drag to contend with. Thought it was the parking brake linkage, but loosening up that made no difference. I'm wondering if the master cylinder piston push rods need to be backed off - thinking that the fluid inlet hole may be covered with the piston. Although was able to bleed brakes from the bottom okay.

Charles
'

Jack Mitchard · Post by **Jack Mitchard** » Fri Sep 15, 2017 6:38 am

'? Charles, Did you do a field approval with yor cleveland brake conversion? If so, could you send a copy? Thanks. Jack Mitchard N49830

----- Original Message ----- From: cmueller@csuchico.edu [fairchildclub] To: fairchildclub@yahoogroups.com Sent: Wednesday, May 27, 2015 5:33 PM Subject: [fairchildclub] Cleveland PT brake installation - conclusion

Several of you have helped me with information of the Cessna 310 brake installation on my PT-26. Thank you all!
I've posted a couple photos in the album N69167 (there are 2 albums with that title).

Braking is smooth with no tendency to grab. Now have much more positive control. The new tires are softer than the 25+ year old ones previously on it so it is harder to roll now. Guess I'll have to start using a tug to get it back into the hangar.

Installation went okay. Bit of a chore to move the axle out 1/4" and rotate it 90 degrees and re-drill for the thru bolt. Removal of Hayes system was simple, and installation of Cleveland brake support plate was a bolt-on operation. Ended up using a -4 hose as the Cleveland brake end uses AN816-4 nipples (with O-ring under the nipple). There wasn't much clearance for a 90 deg angle so I had hoses made with a 90 deg female end to attach to the brake end nipple. Used an AN919-3 reducer to hookup the other end of the hose with the airframes -5 tubing.

Using DOT-5 fluid. Soaked samples of all O-ring in DOT-5 for several day and found no swelling. The rubber pistons in the master cylinders needed the DOT-5 fluid as 5606 fluid resulted in swelling. Added DOT-5 labels to master cylinders and fluid reservoir.

Still have some brake drag to contend with. Thought it was the parking brake linkage, but loosening up that made no difference. I'm wondering if the master cylinder piston push rods need to be backed off - thinking that the fluid inlet hole may be covered with the piston. Although was able to bleed brakes from the bottom okay.

Charles

'