I'm pulling out my master cylinders (Scott 4408B) for other maintenance and figure as long as they're out it would be a good time to give them a good cleaning and new seals if necessary. What I'm looking for is an exploded parts diagram for these master cylinders and/or some re-build verbiage perhaps from a service manual. 4408Bs are not covered in the Series 100 manual. For anyone that has overhauled 4408Bs, are there any critical adjustments/dimensions (like the .040 Lock-O-Seal gap) on other 170 master cylinders? The 4408Bs have three seals/O-rings that can be replaced. One is a common MS O-ring. There other two are unique as far as I can determine...Preferred Airparts had them.
Bob
Scott 4408B Master Cylinder
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
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Hatz617
- Posts: 6
- Joined: Mon Jul 11, 2011 2:28 pm
Scott 4408B Master Cylinder
'51 170A, N5749C, SN 19829
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GAHorn
- Posts: 21295
- Joined: Fri Apr 12, 2002 8:45 pm
Re: Scott 4408B Master Cylinder
Univair handles repair parts for these type brake cyls.
The Aeronca group also uses these, and one of their suppliers and better-known shops who sells parts for the Scott brakes is:
BURL'S AIRCRAFT, LLC
Burl A. Rogers
Manager/Member
P.O. Box 671487
22635 Davidson Dr. (UPS/FEDEX only)
Chugiak, Alaska 99567
Phone: 907-688-3715
Fax: 907-688-5031
Email: burl@biginalaska.com
The Aeronca group also uses these, and one of their suppliers and better-known shops who sells parts for the Scott brakes is:
BURL'S AIRCRAFT, LLC
Burl A. Rogers
Manager/Member
P.O. Box 671487
22635 Davidson Dr. (UPS/FEDEX only)
Chugiak, Alaska 99567
Phone: 907-688-3715
Fax: 907-688-5031
Email: burl@biginalaska.com
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
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Hatz617
- Posts: 6
- Joined: Mon Jul 11, 2011 2:28 pm
Re: Scott 4408B Master Cylinder
Both Univair and Burl's were out of stock.
Bob
Bob
'51 170A, N5749C, SN 19829
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n3833v
- Posts: 858
- Joined: Tue Apr 23, 2002 6:02 pm
Re: Scott 4408B Master Cylinder
Has anyone had problems with fluid coming out the vent hole on top of these cylinders? What might be bypassing?
John
John
John Hess
Past President 2018-2021
President 2016-2018, TIC170A
Vice President 2014-2016, TIC170A
Director 2005-2014, TIC170A
N3833V Flying for Fun
'67 XLH 900 Harley Sportster
EAA Chapter 390 Pres since 2006
K3KNT
Past President 2018-2021
President 2016-2018, TIC170A
Vice President 2014-2016, TIC170A
Director 2005-2014, TIC170A
N3833V Flying for Fun
'67 XLH 900 Harley Sportster
EAA Chapter 390 Pres since 2006
K3KNT
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GAHorn
- Posts: 21295
- Joined: Fri Apr 12, 2002 8:45 pm
Re: Scott 4408B Master Cylinder
Have you recently topped them off with fluid?...or worked on the calipers?n3833v wrote:Has anyone had problems with fluid coming out the vent hole on top of these cylinders? What might be bypassing?
John
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
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n3833v
- Posts: 858
- Joined: Tue Apr 23, 2002 6:02 pm
Re: Scott 4408B Master Cylinder
I have not George. It is for another 170 on the field and he has it being rebuilt with new seals.
John
John
John Hess
Past President 2018-2021
President 2016-2018, TIC170A
Vice President 2014-2016, TIC170A
Director 2005-2014, TIC170A
N3833V Flying for Fun
'67 XLH 900 Harley Sportster
EAA Chapter 390 Pres since 2006
K3KNT
Past President 2018-2021
President 2016-2018, TIC170A
Vice President 2014-2016, TIC170A
Director 2005-2014, TIC170A
N3833V Flying for Fun
'67 XLH 900 Harley Sportster
EAA Chapter 390 Pres since 2006
K3KNT
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