Re: PT Brakes

[Steve Link]

'Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated!  Thanks, PT-23 N64225'

[Steve Link]

' Well, I should have looked in the Maintenance and Erection Manual, Section 5, Para. 4, Fig. 77. The Springs in the drawings are a bit different with lips on them instead of just a straight leaf. Oh well, that's what came out of her!
 
To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Thu, 17 Mar 2016 19:49:16 -0500
Subject: [fairchildclub] PT Brakes

  Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!
What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated!  Thanks, PT-23 N64225
'

[robert Etter]

'I think you have the same expander tube brake assembly that the F-24's have.  The arched portion is against the pads and the tips are close to the brake ring.  I think on the assembly process, don't tighten the nuts and bolts on the two halves until you have all the pieces in place.  As you assemble it, snug up the nuts & bolts slightly as you get the pieces on that side of the assembly in place.  Is your brake drum nice an smooth?  Do you have new pads?   If so, you will probably need to get use of a lathe and remove some pad material so you can get to the allowable pad/drum tolerance.  The number is in the manual.  I would look it up, but my eyes are real tired.  I have spent most of the afternoon hand stitching a new 40" zipper into my headliner.Bob

On Thursday, March 17, 2016 5:50 PM, "Steve Link steven_link@msn.com [fairchildclub]" wrote:


  Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated!  Thanks, PT-23 N64225 #ygrps-yiv-188074444 #ygrps-yiv-188074444yiv4789009563 #ygrps-yiv-188074444yiv4789009563 -- #ygrps-yiv-188074444yiv4789009563ygrp-mkp { border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;} #ygrps-yiv-188074444 #ygrps-yiv-188074444yiv4789009563 #ygrps-yiv-188074444yiv4789009563ygrp-mkp hr { border:1px solid #d8d8d8;} #ygrps-yiv-188074444 #ygrps-yiv-188074444yiv4789009563 #ygrps-yiv-188074444yiv4789009563ygrp-mkp #ygrps-yiv-188074444yiv4789009563hd { color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;} #ygrps-yiv-188074444 #ygrps-yiv-188074444yiv4789009563 #ygrps-yiv-188074444yiv4789009563ygrp-mkp #ygrps-yiv-188074444yiv4789009563ads { margin-bottom:10px;} #ygrps-yiv-188074444 #ygrps-yiv-188074444yiv4789009563 #ygrps-yiv-188074444yiv4789009563ygrp-mkp .ygrps-yiv-188074444yiv4789009563ad { padding:0 0;} #ygrps-yiv-188074444 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'

[Steve Link]

' Yes, the arched part can either go down with the tips sweeping up away from the tubes like in a smile, or arch up with the tips closer down to the tubes like a frown. In T.O. 01-115GA-2, sec. 5, para. 4, Fig. 77 it looks like the arch is to the bottom of the pad slot close to the tube, and the tips are sweeping up away from the tube, like a smile. As far as turning the pads, I guess that has to be done after assembly?  I haven't found the blueprint yet....They sure don't make it simple do they....
"New blocks must be ground, concentric with center hole in brake on suitable machine to a diameter that will give proper clearance for brake in drum as specified on the blueprint of brake assembly."
A "suitable" machine? A lathe?
 
To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Fri, 18 Mar 2016 03:02:36 +0000
Subject: Re: [fairchildclub] PT Brakes

  I think you have the same expander tube brake assembly that the F-24's have.  The arched portion is against the pads and the tips are close to the brake ring.  I think on the assembly process, don't tighten the nuts and bolts on the two halves until you have all the pieces in place.  As you assemble it, snug up the nuts & bolts slightly as you get the pieces on that side of the assembly in place.  Is your brake drum nice an smooth?  Do you have new pads?   If so, you will probably need to get use of a lathe and remove some pad material so you can get to the allowable pad/drum tolerance.  The number is in the manual.  I would look it up, but my eyes are real tired.  I have spent most of the afternoon hand stitching a new 40" zipper into my headliner.Bob

On Thursday, March 17, 2016 5:50 PM, "Steve Link steven_link@msn.com [fairchildclub]" wrote:


  Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated!  Thanks, PT-23 N64225


'

[Steve Link]

'Not sure if this will come thru.....Pic of the diagram.


To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Fri, 18 Mar 2016 13:14:32 -0500
Subject: RE: [fairchildclub] PT Brakes




























Yes, the arched part can either go down with the tips sweeping up away from the tubes like in a smile, or arch up with the tips closer down to the tubes like a frown. In T.O. 01-115GA-2, sec. 5, para. 4, Fig. 77 it looks like the arch is to the bottom of the pad slot close to the tube, and the tips are sweeping up away from the tube, like a smile. As far as turning the pads, I guess that has to be done after assembly? I haven't found the blueprint yet....They sure don't make it simple do they....
"New blocks must be ground, concentric with center hole in brake on suitable machine to a diameter that will give proper clearance for brake in drum as specified on the blueprint of brake assembly."
A "suitable" machine? A lathe?

To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Fri, 18 Mar 2016 03:02:36 +0000
Subject: Re: [fairchildclub] PT Brakes


























I think you have the same expander tube brake assembly that the F-24's have. The arched portion is against the pads and the tips are close to the brake ring. I think on the assembly process, don't tighten the nuts and bolts on the two halves until you have all the pieces in place. As you assemble it, snug up the nuts & bolts slightly as you get the pieces on that side of the assembly in place. Is your brake drum nice an smooth? Do you have new pads? If so, you will probably need to get use of a lathe and remove some pad material so you can get to the allowable pad/drum tolerance. The number is in the manual. I would look it up, but my eyes are real tired. I have spent most of the afternoon hand stitching a new 40" zipper into my headliner.Bob

On Thursday, March 17, 2016 5:50 PM, "Steve Link steven_link@msn.com [fairchildclub]" wrote:













Well, I?m getting ready to put my PT-23 Brakes back together?.should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I?m thinking they went with the tips angled up towards the drum and the center towards the axle? It?s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated! Thanks, PT-23 N64225










































[Non-text portions of this message have been removed]

'

[Steve Link]

' Nope, it didn't......why do some yahoo groups allow pix postings and other don't?
 

> To: fairchildclub@yahoogroups.com
> From: fairchildclub@yahoogroups.com
> Date: Fri, 18 Mar 2016 13:20:02 -0500
> Subject: RE: [fairchildclub] PT Brakes
>
> Not sure if this will come thru.....Pic of the diagram.
>
>
> To: fairchildclub@yahoogroups.com
> From: fairchildclub@yahoogroups.com
> Date: Fri, 18 Mar 2016 13:14:32 -0500
> Subject: RE: [fairchildclub] PT Brakes
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> Yes, the arched part can either go down with the tips sweeping up away from the tubes like in a smile, or arch up with the tips closer down to the tubes like a frown. In T.O. 01-115GA-2, sec. 5, para. 4, Fig. 77 it looks like the arch is to the bottom of the pad slot close to the tube, and the tips are sweeping up away from the tube, like a smile. As far as turning the pads, I guess that has to be done after assembly? I haven't found the blueprint yet....They sure don't make it simple do they....
> "New blocks must be ground, concentric with center hole in brake on suitable machine to a diameter that will give proper clearance for brake in drum as specified on the blueprint of brake assembly."
> A "suitable" machine? A lathe?
>
> To: fairchildclub@yahoogroups.com
> From: fairchildclub@yahoogroups.com
> Date: Fri, 18 Mar 2016 03:02:36 +0000
> Subject: Re: [fairchildclub] PT Brakes
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> I think you have the same expander tube brake assembly that the F-24's have. The arched portion is against the pads and the tips are close to the brake ring. I think on the assembly process, don't tighten the nuts and bolts on the two halves until you have all the pieces in place. As you assemble it, snug up the nuts & bolts slightly as you get the pieces on that side of the assembly in place. Is your brake drum nice an smooth? Do you have new pads? If so, you will probably need to get use of a lathe and remove some pad material so you can get to the allowable pad/drum tolerance. The number is in the manual. I would look it up, but my eyes are real tired. I have spent most of the afternoon hand stitching a new 40" zipper into my headliner.Bob
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> On Thursday, March 17, 2016 5:50 PM, "Steve Link steven_link@msn.com [fairchildclub]" wrote:
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> Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated! Thanks, PT-23 N64225
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> Yahoo Groups Links
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> To visit your group on the web, go to:
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'

[Joe Preston]

' It is up to the administrator. We allow pictures to be sent in all of my other yahoo groups.   -- Joe   From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: Friday, March 18, 2016 2:30 PM
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] PT Brakes     Nope, it didn't......why do some yahoo groups allow pix postings and other don't?
 

> To: fairchildclub@yahoogroups.com
> From: fairchildclub@yahoogroups.com
> Date: Fri, 18 Mar 2016 13:20:02 -0500
> Subject: RE: [fairchildclub] PT Brakes
>
> Not sure if this will come thru.....Pic of the diagram.
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> To: fairchildclub@yahoogroups.com
> From: fairchildclub@yahoogroups.com
> Date: Fri, 18 Mar 2016 13:14:32 -0500
> Subject: RE: [fairchildclub] PT Brakes
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> Yes, the arched part can either go down with the tips sweeping up away from the tubes like in a smile, or arch up with the tips closer down to the tubes like a frown. In T.O. 01-115GA-2, sec. 5, para. 4, Fig. 77 it looks like the arch is to the bottom of

the pad slot close to the tube, and the tips are sweeping up away from the tube, like a smile. As far as turning the pads, I guess that has to be done after assembly? I haven't found the blueprint yet....They sure don't make it simple do they....

> "New blocks must be ground, concentric with center hole in brake on suitable machine to a diameter that will give proper clearance for brake in drum as specified on the blueprint of brake assembly."
> A "suitable" machine? A lathe?
>
> To: fairchildclub@yahoogroups.com
> From: fairchildclub@yahoogroups.com
> Date: Fri, 18 Mar 2016 03:02:36 +0000
> Subject: Re: [fairchildclub] PT Brakes
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> I think you have the same expander tube brake assembly that the F-24's have. The arched portion is against the pads and the tips are close to the brake ring. I think on the assembly process, don't tighten the nuts and bolts on the two halves until you have

all the pieces in place. As you assemble it, snug up the nuts & bolts slightly as you get the pieces on that side of the assembly in place. Is your brake drum nice an smooth? Do you have new pads? If so, you will probably need to get use of a lathe and remove some pad material so you can get to the allowable pad/drum tolerance. The number is in the manual. I would look it up, but my eyes are real tired. I have spent most of the afternoon hand stitching a new 40" zipper into my headliner.Bob

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> On Thursday, March 17, 2016 5:50 PM, "Steve Link steven_link@msn.com

steven_link@msn.com [fairchildclub]" wrote:

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> Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up

towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated! Thanks, PT-23 N64225

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> ------------------------------------
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> ------------------------------------
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> Yahoo Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/fairchildclub/
>
> Your email settings:
> Individual Email | Traditional
>
> To change settings online go to:
> http://groups.yahoo.com/group/fairchildclub/join
> (Yahoo! ID required)
>
> To change settings via email:
> fairchildclub-digest@yahoogroups.com
> fairchildclub-fullfeatured@yahoogroups.com
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
> Your use of Yahoo Groups is subject to:
> https://info.yahoo.com/legal/us/yahoo/utos/terms/
>

'

[robert Etter]

'I guess that there is different variations of the manual.  Mine has the expander tube assembly in the same section, but fig 58.  Fig 59 has the whole wheel assembly.  What is odd, the figure has the input brake line on the top side.Well, sounds like you have it  under control. 
I only reused 3 pieces of wood that was on the airframe when I bought it in 1969. Bob

On Friday, March 18, 2016 11:14 AM, "Steve Link steven_link@msn.com [fairchildclub]" wrote:


  Yes, the arched part can either go down with the tips sweeping up away from the tubes like in a smile, or arch up with the tips closer down to the tubes like a frown. In T.O. 01-115GA-2, sec. 5, para. 4, Fig. 77 it looks like the arch is to the bottom of the pad slot close to the tube, and the tips are sweeping up away from the tube, like a smile. As far as turning the pads, I guess that has to be done after assembly?  I haven't found the blueprint yet....They sure don't make it simple do they....
"New blocks must be ground, concentric with center hole in brake on suitable machine to a diameter that will give proper clearance for brake in drum as specified on the blueprint of brake assembly."
A "suitable" machine? A lathe?
 
To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Fri, 18 Mar 2016 03:02:36 +0000
Subject: Re: [fairchildclub] PT Brakes

  I think you have the same expander tube brake assembly that the F-24's have.  The arched portion is against the pads and the tips are close to the brake ring.  I think on the assembly process, don't tighten the nuts and bolts on the two halves until you have all the pieces in place.  As you assemble it, snug up the nuts & bolts slightly as you get the pieces on that side of the assembly in place.  Is your brake drum nice an smooth?  Do you have new pads?   If so, you will probably need to get use of a lathe and remove some pad material so you can get to the allowable pad/drum tolerance.  The number is in the manual.  I would look it up, but my eyes are real tired.  I have spent most of the afternoon hand stitching a new 40" zipper into my headliner.Bob

On Thursday, March 17, 2016 5:50 PM, "Steve Link steven_link@msn.com [fairchildclub]" wrote:


  Well, I’m getting ready to put my PT-23 Brakes back together….should have taken pix!What I am trying to figure out is which way the Retracting Springs, PN A-21-26, figure 35, are supposed to go into the pads. I’m thinking they went with the tips angled up towards the drum and the center towards the axle? It’s not really clear in the T.O. Also any tricks on getting them all in over the expander tube and frames? Should I use the drum to place them all together?Any help would be appreciated!  Thanks, PT-23 N64225


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[Non-text portions of this message have been removed]

'

[Steve Link]

'Just got thru rebuilding my master cylinders…..took all of about 30 minutes after removing them from the plane. Thankfully my cylinders were in excellent shape. Pix to follow if they don’t show on this e-mail.

Not sure why there are two different types. The LH one looks like it has a spot welded saddle for the fitting, and a longer end sweated on with an internal stop, possible a cheaper wartime type. RH has a tag on it with 38776 stamped on it….seems much more solid.

Used Rockauto Raybestos MK-190 kits….



From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]

Sent: Sunday, October 29, 2017 8:00 AM

To: fairchildclub@yahoogroups.com

Subject: RE: [fairchildclub] PT-26





There is a rebuild kit for them if all you need is the internals and your cylinder is OK. The last answer I got was the Rockauto Raybestos MK-190 kits and appear to be identical to the parts for the PT-19/23/26 cylinder with the one inch bore.



From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]

Sent: Saturday, October 28, 2017 10:36 AM

To: fairchildclub@yahoogroups.com

Subject: Re: [fairchildclub] PT-26







Thank you very much, I will give them a call

Sent from my iPad

On Oct 28, 2017, at 11:26 AM, Jay Herrin jayherrin@bellsouth.net [fairchildclub] wrote:





David... try White Post Restorations. 540-837-1140



They did the master cylinders on my OTW and I’m am very happy with their work!



Jay

Sent from my iPad



On Oct 28, 2017, at 10:59 AM, David Stout aviator5@bellsouth.net [fairchildclub] wrote:





Finally found a couple of decent expander tubes for this airplane, however was disappointed to find both master cylinders leaking like a sieve.....removed them and took them apart. Bore looks fairly decent but needs new seals, cup style seals...anybody have any idea where I might find these? Thanks for any ideas you may have.



David Stout





[Non-text portions of this message have been removed]

'

[Steve Link]

'
Just loaded the pix under the album PT Brakes.....


From: fairchildclub@yahoogroups.com on behalf of Steve Link steven_link@msn.com [fairchildclub]
Sent: Sunday, November 5, 2017 12:45 PM
To: fairchildclub@yahoogroups.com
Subject: [fairchildclub] PT Brakes    
Just got thru rebuilding my master cylinders…..took all of about 30 minutes after removing them from the plane. Thankfully my cylinders were in excellent shape. Pix to follow if they don’t show on this e-mail.
Not sure why there are two different types. The LH one looks like it has a spot welded saddle for the fitting, and a longer end sweated on with an internal stop, possible a cheaper wartime type. RH has a tag on it with 38776 stamped on it….seems much more solid.
Used Rockauto Raybestos MK-190 kits….

From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: Sunday, October 29, 2017 8:00 AM
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] PT-26


There is a rebuild kit for them if all you need is the internals and your cylinder is OK. The last answer I got was the Rockauto Raybestos MK-190 kits and appear to be identical to the parts for the PT-19/23/26 cylinder with the one inch bore.

From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: Saturday, October 28, 2017 10:36 AM
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] PT-26



Thank you very much, I will give them a call
Sent from my iPad

On Oct 28, 2017, at 11:26 AM, Jay Herrin jayherrin@bellsouth.net [fairchildclub] wrote:


David... try White Post Restorations. 540-837-1140

They did the master cylinders on my OTW and I’m am very happy with their work!

Jay
Sent from my iPad

On Oct 28, 2017, at 10:59 AM, David Stout aviator5@bellsouth.net [fairchildclub] wrote:


Finally found a couple of decent expander tubes for this airplane, however was disappointed to find both master cylinders leaking like a sieve.....removed them and took them apart. Bore looks fairly decent but needs new seals, cup style seals...anybody have any idea where I might find these? Thanks for any ideas you may have.

David Stout


[Non-text portions of this message have been removed]

'