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Old 03-02-2009, 11:10 AM
guccidude1 guccidude1 is online now
Join Date: Mar 2008
Location: Reno NV
Posts: 533
Default RE: Sticky brakes (extra springs and stuff)

I used the following from McMaster Carr

(1) Pkg 6389K625
Nylon Bearing Flanged, for 3/8" Shaft Dia, 1/2" Od,
3/8" Length, Packs of 5 $1.97 Pkg

(1) Pkg 9657K115
Steel Compression Spring Zinc-Plated Spring-Tempered,
L, 1/2" Od, .047" Dia, Packs of 12 $5.29 Pkg

(4) Ea. 9946K13
Aluminum Set Screw Shaft Collar 3/8" Bore, 3/4"
Outside Diameter, 3/8" Width $1.82 EA.

for a total cost of about $19.62 with shipping in US.
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Old 03-02-2009, 12:55 PM
Steve Sampson Steve Sampson is offline
Join Date: Aug 2005
Location: N. Yorkshire, England
Posts: 1,050
Default AN3-55A

Originally Posted by N737Z View Post
...... Does anyone have the AN # required for the bolt?

Don, I used AN3-55A but I would suggest you also measure. Steve.

G-IKON Build log here , or Index to blog here.
RV4 #4478 - Flying since 16th June '08. First flight video here.
Circuits at my 1000' strip.
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Old 03-03-2009, 12:26 AM
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rvmills rvmills is offline
Join Date: Nov 2007
Location: Reno, NV
Posts: 2,101

Originally Posted by N737Z View Post
Does anyone have the AN # required for the bolt?


I used AN3-60A bolts when I did the long-bolt mod on my -6. Actually used the -60A bolts a friend/-7A builder had for his project, and replaced them with like-kind. Just another data point...concur with Steve about measuring.

Bob Mills
RV-6 "Rocket Six" N49VM
Reno-Stead, NV (KRTS)
President/Sport 47/49, Sport Class Air Racing
President, Formation Flying Inc (FFI)
Flight Lead, Lightning Formation Airshows
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Old 03-03-2009, 06:48 AM
N737Z N737Z is offline
Join Date: Sep 2007
Location: Larkspur, Colorado
Posts: 31

Thanks Mike!
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Old 03-03-2009, 01:20 PM
N737Z N737Z is offline
Join Date: Sep 2007
Location: Larkspur, Colorado
Posts: 31

All great help guys! Thanks!

Don Pierson
Titan IO360
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Old 08-06-2009, 04:29 PM
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BSwayze BSwayze is offline
Join Date: Jul 2007
Location: Molalla, Oregon
Posts: 954

After carefully measuring, I bought a pair of AN3-56 bolts from Genuine Aircraft Hardware.

They're the perfect length for my RV-7A's brake pedals. Your mileage may vary. What shocked me was the price for a couple of bolts. They're more than $15 each. With shipping, it was over $40!

But I'm glad I did it. I don't want sticky brakes on my airplane.
Bruce Swayze
RV-7A Standard Build
First flight November 3, 2019!
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Old 08-06-2009, 11:38 PM
PCHunt PCHunt is offline
Join Date: Feb 2007
Location: San Diego, CA
Posts: 1,610
Default One more plug for Grove

One more plug for Grove master cylinders. (No connection) They have internal springs, and are adjustable in length so you can set the pedals just the way you want them. Very crisp in action, no drag.

I used the long bolts, as well.
Pete Hunt, [San Diego] VAF #1069
RV-6, RV-6A, T-6G

2020 Donation+, Gladly Sent
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Old 02-17-2014, 10:37 AM
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Mike S Mike S is offline
Senior Curmudgeon
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 14,926
Default Sticky

This issue keeps coming around every few years, gonna make this thread a sticky.
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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Old 06-29-2015, 06:42 AM
kkmarshall kkmarshall is offline
Join Date: Sep 2014
Location: Central Tx
Posts: 138
Default Booster springs

A quick thank you to "guccidude1" for listing all the needed parts from McMaster-Carr with part #'s,made it easy for me and the brakes feel much more positive on return of the pedals.

329DR RV10-bought flying
Continually upgrading/tweaking
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Old 07-09-2015, 07:30 PM
maus92 maus92 is offline
Join Date: Nov 2013
Location: Annapolis MD
Posts: 457

Looking to do the single axle brake pedal mod to my RV-8 brakes to help prevent accidental brake application when landing (I have big feet, size 13 if you must know...) I'm hoping that the axle will provide a surface to concentrate unintended pressure. Anyway, I've noted that some -6 and -7 mods use AN3-56 or AN3-60 bolts as the axle, but the RV-8 pedal width is about 7.5" where the bolts terminate. I was thinking about cutting a 3/16 steel rod to size and threading the ends - has anyone done this? Should I sleeve the rod within the pedal face?
2000 RV-8A | O-360, SDS CPI, FP, G3X Touch, VP-X, EarthX | Eastern Shore | KESN
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