Clutch Slave Cylinder Rebuild - BMW Luxury Touring Community
 
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Old May 20th, 2014, 8:54 pm Thread Starter
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Clutch Slave Cylinder Rebuild

Mine leaked and ruined the clutch disk a couple of months ago.

Today, got bored and took the old, leaky one apart. Seal looked good, bore is fine. Would think a new seal (cup) would make it as good as new. The seal looks like the same design as you would find in a wheel brake cylinder.

Anyone try this? Pains me to see BMW ask and get $155 for a part that probably cost less than $10 to make. Looked real close and it appears to be made out of aluminum, not gold or platinum. Think that seal would probably sell for $3.00 or so. No precious metal found there either.

B D R
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Old May 20th, 2014, 8:57 pm
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Re: Clutch Slave Cylinder Rebuild

The hard part is finding the seal as it is most likely a custom size knowing BMW. I think our old friend David Shealey looked into this some years ago.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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Old May 20th, 2014, 10:27 pm
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Re: Clutch Slave Cylinder Rebuild

Several years ago I sent it to a friend who designs hydraulic systems and he sourced them for me out of a different material than the BMW original. I rebuilt several slave cylinders and to my knowledge none have failed.

Jeff in Myrtle Beach
'01 LTC
'99 Icon champagne
'02 KLR 650
TZ 185 2 stroke
Honda R100R beater

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Old May 21st, 2014, 6:52 am
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Re: Clutch Slave Cylinder Rebuild

Quote:
Originally Posted by jeffklt View Post
Several years ago I sent it to a friend who designs hydraulic systems and he sourced them for me out of a different material than the BMW original. I rebuilt several slave cylinders and to my knowledge none have failed.
Care to share a part # ?

True Wisdom Only Comes From Pain.


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Old May 21st, 2014, 6:59 am
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Re: Clutch Slave Cylinder Rebuild

Hi,
I did the same down under. Went to a local Seal manufaturer and had it built/cut. It has been going now for 2 years without an issue. Cost of initial seal Aus$75. Any new ones around $40.
I then just repacked the bearing and hope to get some good life.

Brian

2005 dark Blue with chrome option
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Old May 21st, 2014, 8:34 am
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Re: Clutch Slave Cylinder Rebuild

Quote:
Originally Posted by gunny View Post
Mine leaked and ruined the clutch disk a couple of months ago.

Today, got bored and took the old, leaky one apart. Seal looked good, bore is fine. Would think a new seal (cup) would make it as good as new. The seal looks like the same design as you would find in a wheel brake cylinder.

Anyone try this? Pains me to see BMW ask and get $155 for a part that probably cost less than $10 to make. Looked real close and it appears to be made out of aluminum, not gold or platinum. Think that seal would probably sell for $3.00 or so. No precious metal found there either.
The guys at the Chromeheads website researched for seals and found a provider. The engines are R class over there but the idea is the same.

Link to the thread here: http://www.chromeheads.org/discus/me...tml?1378530505



If the bearing is bad... you need to get a new unit.

2009 R1200RT
Past Rides: 2003 K1200LT "Gertrude" (sold) / 2004 R1200CLC "Petunia" (sold) 2005 Kawi Concours (gone)


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Old May 21st, 2014, 10:40 pm
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Re: Clutch Slave Cylinder Rebuild

Quote:
Originally Posted by johnT View Post
Care to share a part # ?
Dayton Seal & Packing
110 East Third St
Dayton, Oh 45402
937 228 2300


P/N UNP-14 x 20 x 4

14mm bore.

Jeff in Myrtle Beach
'01 LTC
'99 Icon champagne
'02 KLR 650
TZ 185 2 stroke
Honda R100R beater

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Old May 22nd, 2014, 7:25 am
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Re: Clutch Slave Cylinder Rebuild

Quote:
Originally Posted by jeffklt View Post
Dayton Seal & Packing
110 East Third St
Dayton, Oh 45402
937 228 2300


P/N UNP-14 x 20 x 4

14mm bore.

Thanks.

True Wisdom Only Comes From Pain.


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Old May 22nd, 2014, 6:43 pm
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Re: Clutch Slave Cylinder Rebuild

Quote:
Originally Posted by jeffklt View Post
Dayton Seal & Packing
110 East Third St
Dayton, Oh 45402
937 228 2300


P/N UNP-14 x 20 x 4

14mm bore.
The size is correct as I just looked at my old one, but the bore is 20 mm not 14 mm.

Looks like the one the R bike guys use is a different size slave unit. Yup they use a 24 mm slave so don't order those.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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