While working in the hangar I noticed that hydrualic fluid was dripping from my Cleveland Wheel Brakes onto the hangar floor.
The temperature last night had dropped to 12-degrees F., which apparently hardened the O-ring seals on the caliper "pucks" and perhaps caused a bit of shrinkage also.... resulting in a loss of hyd. fluid.
Just thought I'd add a cautionary note to things to "look out" for during cold wx preflights.
(The O-ring is replaceable, of course. The standard Cleveland STC calls for the 30-63A brake assembly, which uses an MS28775-224 O-ring (1/8"x1-3/4"x2")
Spruce sells them for 58-cents each. The Parker-Hannifin/Cleveland PN 101-05200 (equivalent in every way) is $14.00 each.
Cold Weather Adversely affects Brakes
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
Cold Weather Adversely affects Brakes
'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.
Re: Cold Weather Adversely affects Brakes
Hell George, when it gets cold up here we don't even have the brakes installed!
Tim
Re: Cold Weather Adversely affects Brakes
Just exactly...WHEN...does it get "cold" up there?mit wrote:Hell George, when it gets cold up here we don't even have the brakes installed!
'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.
Re: Cold Weather Adversely affects Brakes
This weekend its suppose to get to 30 below.... but who knows
Tim
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- Posts: 3481
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Re: Cold Weather Adversely affects Brakes
The only time I have ever had the wheel cylinder o-rings leak is when the brake pads and/or brake disk are at their min thickness and the piston is more extended than when the pads/disks are new
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
Re: Cold Weather Adversely affects Brakes
Not the case in this instance.hilltop170 wrote:The only time I have ever had the wheel cylinder o-rings leak is when the brake pads and/or brake disk are at their min thickness and the piston is more extended than when the pads/disks are new
'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.
-
- Posts: 3481
- Joined: Sat May 06, 2006 6:05 pm
Re: Cold Weather Adversely affects Brakes
That’s very interesting as both my C-170 with single puck Clevelands and my C-180 with double puck Clevelands sat outside for years winter and summer in Alaska without ever seeing a problem with fluid leaking out of the wheel cylinders.
Makes me wonder if the o-ring material has been changed to a less cold-resistant elastomer, or maybe some other change in the system?
Makes me wonder if the o-ring material has been changed to a less cold-resistant elastomer, or maybe some other change in the system?
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
Re: Cold Weather Adversely affects Brakes
The O-rings in my Cleveland single-puck cylinders last about five years, then start to seep. I assume the cylinders would benefit from polishing.
Re: Cold Weather Adversely affects Brakes
I've never had mine leak due to cold, but then, it may depend on the age and type of o-ring. I still have the Goodyears and they have always worked fine. Good thing to watch for though, there's always a first time.
Bruce
1950 170A N5559C
1950 170A N5559C