Single to dual brake pedals

Ask Questions and Offer Advice Related to the Cessna 120 & 140 Type

Moderators: 6643, 6183, V529

Forum rules
You must be a member of the Cessna 120-140 Association in order to post new topics, reply to existing topics, or search for information on this forum. Use the "Join" link in the red menu bar.
User avatar
regular122
Posts: 112
Joined: Mon Sep 16, 2019 11:01 pm
Location: Oklahoma
Name: Steve
Aircraft Type: 1948 C140 C90
Occupation-Interests:
Contact:

Single to dual brake pedals

Post by regular122 »

I recently purchased a set of dual brake pedals to convert my single set. I am guessing these will use the same brake system that the single set uses but the system of levers applies pressure from the right seat. Are there any pitfalls or advice I should be aware of on installation? Steve
Dual Brake Pedals.jpg
Dual Brake Pedals.jpg (119.98 KiB) Viewed 4640 times
V529
Posts: 552
Joined: Tue May 01, 2018 7:00 am
Location: Michigan
Name: Victor G
Aircraft Type: C-120
Occupation-Interests: Work on airplanes till the cows come home..........they're still out.
Contact:

Re: Single to dual brake pedals

Post by V529 »

It helps to know someone that is very flexible............Other than that. A straight forward installation. No surprises.
User avatar
6643
Posts: 2326
Joined: Tue May 01, 2018 7:00 am
Location: KLCI
Name: John C
Aircraft Type: 1946 C140/C90
Occupation-Interests: A&P, semi-retired
Contact:

Re: Single to dual brake pedals

Post by 6643 »

IIRC, those bearing blocks are magnesium. Unless they're in pristine shape, get the plastic replacements. Tape the nut to the tip of your finger and hold it in place while you thread each bolt in... (Find the right finger tip ahead of time!)
User avatar
regular122
Posts: 112
Joined: Mon Sep 16, 2019 11:01 pm
Location: Oklahoma
Name: Steve
Aircraft Type: 1948 C140 C90
Occupation-Interests:
Contact:

Re: Single to dual brake pedals

Post by regular122 »

Thanks guys! I will let you know how it goes. Steve
User avatar
regular122
Posts: 112
Joined: Mon Sep 16, 2019 11:01 pm
Location: Oklahoma
Name: Steve
Aircraft Type: 1948 C140 C90
Occupation-Interests:
Contact:

Re: Single to dual brake pedals

Post by regular122 »

OK guys, dumb question time. Are there still only two springs when you convert the single brake set of peddles to the dual? Or are there four? The parts manual only shows a diagram of single brake peddles and the forum Cessna Reference Manual has nothing at all. Reason I ask is that the set I purchased is missing the spring with the long hooks and its attaching clip (see attached pic). Can I just migrate the existing springs on my single set or do I need more than two springs? Any help is appreciated.
Dual Brake Pedals back.jpg
Dual Brake Pedals back.jpg (117.62 KiB) Viewed 4544 times
And John, thanks for the note on the magnesium. We went back and gave them a careful look. They appear to be in good shape. If one were to get the plastic mounts, where is the source for those? Are the plastic mounts for the Cessna 150 interchangeable? Thank you. Steve
2356
Posts: 143
Joined: Tue May 01, 2018 7:00 am
Location: Gainesville, TX
Name: Huey Pilot
Aircraft Type: 140
Occupation-Interests: Retired
Contact:

Re: Single to dual brake pedals

Post by 2356 »

There will only be two springs. The 150 bearing blocks are the same.
User avatar
regular122
Posts: 112
Joined: Mon Sep 16, 2019 11:01 pm
Location: Oklahoma
Name: Steve
Aircraft Type: 1948 C140 C90
Occupation-Interests:
Contact:

Re: Single to dual brake pedals

Post by regular122 »

Thank you!
User avatar
regular122
Posts: 112
Joined: Mon Sep 16, 2019 11:01 pm
Location: Oklahoma
Name: Steve
Aircraft Type: 1948 C140 C90
Occupation-Interests:
Contact:

Re: Single to dual brake pedals

Post by regular122 »

Another dumb question -- does this installation require an STC & 337 given this was optional factory equipment? Thanks, Steve
User avatar
6643
Posts: 2326
Joined: Tue May 01, 2018 7:00 am
Location: KLCI
Name: John C
Aircraft Type: 1946 C140/C90
Occupation-Interests: A&P, semi-retired
Contact:

Re: Single to dual brake pedals

Post by 6643 »

No. An STC is approval to install something that is not otherwise approved. Any thing on the type certificate is automatically approved and the installation is a minor modification. An STC amends the type certificate.

A 337 is the form used to record a major repair or a major modification. Not major, no 337...
User avatar
regular122
Posts: 112
Joined: Mon Sep 16, 2019 11:01 pm
Location: Oklahoma
Name: Steve
Aircraft Type: 1948 C140 C90
Occupation-Interests:
Contact:

Re: Single to dual brake pedals

Post by regular122 »

Thank you.
Post Reply

Who is online

Users browsing this forum: No registered users and 15 guests