Re: PT-19 Brakes

Jack Threadgill · Post by **Jack Threadgill** » Sun Sep 13, 2009 6:39 am

'I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink.net

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

Michael Callison · Post by **Michael Callison** » Sun Sep 13, 2009 7:00 am

'You must have a different Master cylinder than what we have because ours uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will work both with our Master Cylinder Seal and the original Hayes Expander Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@yahoogroups.com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

'

Jack Threadgill · Post by **Jack Threadgill** » Sun Sep 13, 2009 11:08 am

'Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster.com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink.net

-----Original Message-----
From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

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

Bob Haas · Post by **Bob Haas** » Sun Sep 13, 2009 1:27 pm

'It will not destroy the paint!

-----Original Message-----
From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
On Behalf Of Jack Threadgill
Sent: Sunday, September 13, 2009 1:07 PM
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] PT-19 Brakes

Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster.com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink.net

-----Original Message-----
From: fairchildclub@yahoogroups.com
[mailto:fairchildclub@yahoogroups.com
]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

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

No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.409 / Virus Database: 270.13.93/2365 - Release Date: 09/13/09
05:50:00'

Jack Threadgill · Post by **Jack Threadgill** » Sun Sep 13, 2009 1:57 pm

'That's nice.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink.net

-----Original Message-----
From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
On Behalf Of Bob Haas
Sent: Sunday, September 13, 2009 1:27 PM
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] PT-19 Brakes

It will not destroy the paint!

-----Original Message-----
From: fairchildclub@
yahoogroups.com [mailto:fairchildclub@
yahoogroups.com]
On Behalf Of Jack Threadgill
Sent: Sunday, September 13, 2009 1:07 PM
To: fairchildclub@ yahoogroups.com
Subject: RE: [fairchildclub] PT-19 Brakes

Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster.com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@
yahoogroups.com
[mailto:fairchildclub@
yahoogroups.com
]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@ yahoogroups.com

Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

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

No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.409 / Virus Database: 270.13.93/2365 - Release Date: 09/13/09
05:50:00

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

Michael Callison · Post by **Michael Callison** » Sun Sep 13, 2009 9:33 pm

'I did not get back to my email again until tonight. The responses you got from these other people are correct. We also are using the DOT 5 in our struts but 5606 Hydraulic Fluid would work fine. By keeping everything in the DOT 5 we do not have any miscommunication on what is used where. If you need the cup seals the Ford F100 early larger wheel cylinder seals work perfectly. I think I have the part number out at the airport and I will post it for you. This is something I learned from from talking to people in this Chat Room. They are very knowledgeable and helpful.

Michael D. Callison
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: RE: [fairchildclub] PT-19 Brakes
To: fairchildclub@yahoogroups.com
Date: Sunday, September 13, 2009, 5:07 PM

Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster. com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@ yahoogroups. com [mailto:fairchildclub@ yahoogroups. com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@ yahoogroups. com
Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups. com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

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

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

'

Jack Threadgill · Post by **Jack Threadgill** » Sun Sep 13, 2009 9:40 pm

'Thanks, Michael, that sure makes since on the one type of fluid to keep it
simple. I need simple...

Since I visited with you a NAPA Kit # UP 190 has been recommended for a
repair of the 1" Goodyear cylinders. I would appreciate the Ford part
number when you have a chance to send it. I will be out looking for parts
tomorrow.

Thanks again for your assistance.

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink.net

-----Original Message-----
From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 9:33 PM
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] PT-19 Brakes

I did not get back to my email again until tonight. The responses you got
from these other people are correct. We also are using the DOT 5 in our
struts but 5606 Hydraulic Fluid would work fine. By keeping everything in
the DOT 5 we do not have any miscommunication on what is used where. If you
need the cup seals the Ford F100 early larger wheel cylinder seals work
perfectly. I think I have the part number out at the airport and I will
post it for you. This is something I learned from from talking to people in
this Chat Room. They are very knowledgeable and helpful.

Michael D. Callison
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: RE: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.com
Date: Sunday, September 13, 2009, 5:07 PM

Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster. com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@ yahoogroups. com [mailto:fairchildclub@ yahoogroups.
com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@ yahoogroups. com
Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.
com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

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

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

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

Michael Callison · Post by **Michael Callison** » Tue Sep 15, 2009 6:24 am

'Jack,
What I found was it fit's a 1964 Ford F-150 listed for Wagner Bendix Wheel Cylinder Repair Kit MFG # 5355. We installed these seals in both of our Master Cylinders and they are working perfectly. We bought the kit at Advanced Auto Supply. These seals are larger than most of the later vehicle drum brake wheel kits. I believe they are 1.25 diameter if I recall correctly. That is why I had to look for a specific make and model to find the correct size. Hope everything goes well for you.

Michael D. Callison
Iowa Aviation Heritatge Museum

--- On Mon, 9/14/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: RE: [fairchildclub] PT-19 Brakes
To: fairchildclub@yahoogroups.com
Date: Monday, September 14, 2009, 3:39 AM

Thanks, Michael, that sure makes since on the one type of fluid to keep it
simple. I need simple...

Since I visited with you a NAPA Kit # UP 190 has been recommended for a
repair of the 1" Goodyear cylinders. I would appreciate the Ford part
number when you have a chance to send it. I will be out looking for parts
tomorrow.

Thanks again for your assistance.

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@ yahoogroups. com [mailto:fairchildclub@ yahoogroups. com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 9:33 PM
To: fairchildclub@ yahoogroups. com
Subject: RE: [fairchildclub] PT-19 Brakes

I did not get back to my email again until tonight. The responses you got
from these other people are correct. We also are using the DOT 5 in our
struts but 5606 Hydraulic Fluid would work fine. By keeping everything in
the DOT 5 we do not have any miscommunication on what is used where. If you
need the cup seals the Ford F100 early larger wheel cylinder seals work
perfectly. I think I have the part number out at the airport and I will
post it for you. This is something I learned from from talking to people in
this Chat Room. They are very knowledgeable and helpful.

Michael D. Callison
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: RE: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups. com
Date: Sunday, September 13, 2009, 5:07 PM

Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster. com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@ yahoogroups. com [mailto:fairchildcl ub@ yahoogroups.
com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@ yahoogroups. com
Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.
com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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

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

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

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

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

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

'

Jack Threadgill · Post by **Jack Threadgill** » Tue Sep 15, 2009 6:54 am

'Thanks, Michael. I have rcvd two NAPA # UP-190 repair kits that are for a 1
inch cylinder that appear will be just the thing. I am in the process of
flushing the system and rebuilding the cylinders. I will give you a report
when finished. That may be a few days because too many other things are
interrupting my airplane work...

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink.net

-----Original Message-----
From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
On Behalf Of Michael Callison
Sent: Tuesday, September 15, 2009 6:25 AM
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] PT-19 Brakes

Jack,
What I found was it fit's a 1964 Ford F-150 listed for Wagner Bendix Wheel
Cylinder Repair Kit MFG # 5355. We installed these seals in both of our
Master Cylinders and they are working perfectly. We bought the kit at
Advanced Auto Supply. These seals are larger than most of the later vehicle
drum brake wheel kits. I believe they are 1.25 diameter if I recall
correctly. That is why I had to look for a specific make and model to find
the correct size. Hope everything goes well for you.

Michael D. Callison
Iowa Aviation Heritatge Museum

--- On Mon, 9/14/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: RE: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.com
Date: Monday, September 14, 2009, 3:39 AM

Thanks, Michael, that sure makes since on the one type of fluid to keep it
simple. I need simple...

Since I visited with you a NAPA Kit # UP 190 has been recommended for a
repair of the 1" Goodyear cylinders. I would appreciate the Ford part
number when you have a chance to send it. I will be out looking for parts
tomorrow.

Thanks again for your assistance.

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@ yahoogroups. com [mailto:fairchildclub@ yahoogroups.
com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 9:33 PM
To: fairchildclub@ yahoogroups. com
Subject: RE: [fairchildclub] PT-19 Brakes

I did not get back to my email again until tonight. The responses you got
from these other people are correct. We also are using the DOT 5 in our
struts but 5606 Hydraulic Fluid would work fine. By keeping everything in
the DOT 5 we do not have any miscommunication on what is used where. If you
need the cup seals the Ford F100 early larger wheel cylinder seals work
perfectly. I think I have the part number out at the airport and I will
post it for you. This is something I learned from from talking to people in
this Chat Room. They are very knowledgeable and helpful.

Michael D. Callison
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: RE: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.
com
Date: Sunday, September 13, 2009, 5:07 PM

Michael, thank you very much for your response. According to my Army
Service Manual for the PT-19, a 1" Goodyear Brake Cylinder is used. The
diagram looks exactly like my Goodyear cylinders.

What is the advantage in the DOT 5 over the DOT 3 Brake Fluid? I have used
Preston DOT 3 that is stated to also be synthetic.

I have found a source for the O-Ring seals, but not the Front Piston Cup
Seal. Fortunately my cup seals seem to be in good shape.

McMaster-Carr at www.mcmaster. com has a large
selection of various size O-rings.

I would appreciate any and all additional info to help on brake maintenance.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

-----Original Message-----
From: fairchildclub@ yahoogroups. com [mailto:fairchildcl ub@ yahoogroups.
com]
On Behalf Of Michael Callison
Sent: Sunday, September 13, 2009 7:01 AM
To: fairchildclub@ yahoogroups. com
Subject: Re: [fairchildclub] PT-19 Brakes

You must have a different Master cylinder than what we have because ours
uses a Ford F100 Wheel Cylinder Seal in it. We use DOT 5 Fluid as it will
work both with our Master Cylinder Seal and the original Hayes Expander
Tubes for the wheels with out reacting to both. DOT 5 is a Synthetic Fluid.

Michael D. Callison
Vice President
Iowa Aviation Heritage Museum

--- On Sun, 9/13/09, Jack Threadgill wrote:

From: Jack Threadgill
Subject: [fairchildclub] PT-19 Brakes
To: fairchildclub@ yahoogroups.
com
Date: Sunday, September 13, 2009, 12:38 PM

I have been working on the brakes of my PT-19 and found one master cylinder
with a slight leak. It has Goodyear 1" No. 511732 Master Cylinders. I need
a source for the O-ring. It looks like a 3/16 thick, 5/8 I.D. and 1" O.D.
O-ring. Can anyone offer help in finding a source for this size O-ring.

Also, the Master Cylinder calls for a Castor Oil Base Fluid, AC3586. What
type of fluid are you using? The previous owner's shop told me they were
using Auto DOT 3 Brake Fluid in the brakes and 5606 in the landing gear
shock struts.

Thanks,

Jack

Jack Threadgill

1602 Brook Hollow Dr

Bryan, TX 77802

979-779-7155

threadgl@suddenlink .net

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