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psb777
Joined: 12 Aug 2009
Posts: 34
Location: UK
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 Posted: Thu May 19, 2011 2:05 am Post subject: Yak brake pads |
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The engineering workshop which maintains my Yak-18T recently purchased some brake pads to fit my aircraft and others. They are at least 1mm too thick. They are finding it impossible to fit the brake pad assembly into the brake drum. I think I was told the same problem will be experienced on Yak-52 (and other Yak) aircraft they maintain as the brakes are the same.
Is that correct? Yak-18T and -52 and -50 brakes are all the same?
Anyone else experiencing this problem?
I'm currently experiencing weak brakes and I'm told I need new pads. Anyone got some known-to-be-good regular thickness brake pads for sale?
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Paul Beardsell
G-PYAK http://beardsell.com/flying/g-pyak
Yak-18T http://beardsell.com/flying/yak18t |
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richard.goode(at)russiana
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| Posted: Thu May 19, 2011 3:07 am Post subject: Yak brake pads |
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Why not grind off the excess thickness-a simple job!!
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
--
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psb777
Joined: 12 Aug 2009
Posts: 34
Location: UK
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| Posted: Thu May 19, 2011 3:27 am Post subject: Re: Yak brake pads |
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Ah, Richard, yes. But no one wants to do that as the composition of the brake pads is, err, unknown, shall we say?
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_________________
Paul Beardsell
G-PYAK http://beardsell.com/flying/g-pyak
Yak-18T http://beardsell.com/flying/yak18t |
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dsavarese0812(at)bellsout
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| Posted: Thu May 19, 2011 3:32 am Post subject: Yak brake pads |
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Yes, the Yak 52 and Yak 50 are basically the same. So are the Nanchang
CJ6 brake pads.
I ran into this once before when I replaced a set of pads and installed
new brake drums at the same time. The first set of new drums were
thicker (inside diameter was smaller). I discussed this with Doug Sapp,
our outstanding CJ6 parts guru, since the drums on the CJ are
interchangeable with the Yak 52. What Doug found was there actually are
some "undersized" brake drums (smaller inside diameter) and I apparently
got 2 of them. Doug exchanged the two new ones I had for two other new
drums with a slightly larger ID and that solved the problem.
As for the weak brakes, assuming the brake pads meet the minimum
thickness specification, if the felt grease seal in the rear of the
brake drum assembly is broken or missing, the grease from the rear
bearing spreads by centrifugal force out over the brake pads. Evidence
of grease on the brake pads is glazed brake pads and very shinny "hot
spot" on the inside of the brake drum and brake dust caked grease around
the metal back plate behind the rear bearing. The glazed brake pads
will definitely cause the feel of weak brakes.
The solution is to remove the brake pads and wash them in avgas as avgas
or automotive brake cleaner as will this will not leave an oily residue
on the pads. Also wash the inside of the brake drum. Clean the greasy
brake dust from the brake assembly. Lightly sand the brake pads with
60-80 grit sandpaper to refresh the pads and reinstall. Finally, be
absolutely certain to install new felt grease seals in both the front
and rear of the brake drum assembly.
Hope this helps,
Dennis
On 5/19/2011 5:05 AM, psb777 wrote:
| Quote: |
The engineering workshop which maintains my Yak-18T recently purchased some brake pads to fit my aircraft and others. They are at least 1mm too thick. They are finding it impossible to fit the brake pad assembly into the brake drum. I think I was told the same problem will be experienced on Yak-52 (and other Yak) aircraft they maintain as the brakes are the same.
Is that correct? Yak-18T and -52 and -50 brakes are all the same?
Anyone else experiencing this problem?
I'm currently experiencing weak brakes and I'm told I need new pads. Anyone got some known-to-be-good regular thickness brake pads for sale?
--------
Paul Beardsell
HA-YAB http://beardsell.com/flying/ha-yab
Yak-18T http://beardsell.com/flying/yak18t
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=340367#340367
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dougsappllc(at)gmail.com
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| Posted: Mon May 23, 2011 9:35 am Post subject: Yak brake pads |
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Have been away, so this reply is a bit late but if you have not been able to get the required info, rest assured that all of the CJ (CJ5 and CJ6) and Yak series (Yak 18,A, T, 50, and 52) aircraft use the same pads, drums and wheels. All of which we carry in inventory if needed. We also carry the wheel felt seals.
Best,
Doug
On Thu, May 19, 2011 at 3:05 AM, psb777 <matronics.com(at)beardsell.com> wrote:
[quote]--> Yak-List message posted by: "psb777" <matronics.com(at)beardsell.com>
The engineering workshop which maintains my Yak-18T recently purchased some brake pads to fit my aircraft and others. They are at least 1mm too thick. They are finding it impossible to fit the brake pad assembly into the brake drum. I think I was told the same problem will be experienced on Yak-52 (and other Yak) aircraft they maintain as the brakes are the same.
Is that correct? Yak-18T and -52 and -50 brakes are all the same?
Anyone else experiencing this problem?
I'm currently experiencing weak brakes and I'm told I need new pads. Anyone got some known-to-be-good regular thickness brake pads for sale?
--------
Paul Beardsell
HA-YAB http://beardsell.com/flying/ha-yab
Yak-18T http://beardsell.com/flying/yak18t
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=340367#340367
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psb777
Joined: 12 Aug 2009
Posts: 34
Location: UK
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| Posted: Thu May 26, 2011 8:44 am Post subject: Re: Yak brake pads |
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Thanks to Dennis and Doug for very useful replies which I have forwarded to my engineer for comment.
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Paul Beardsell
G-PYAK http://beardsell.com/flying/g-pyak
Yak-18T http://beardsell.com/flying/yak18t |
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