Clutch slave cylinder leak

CYYJ said:
Are you aware of any disadvantage to doing that, or any advantage to be gained from using a special brake assembly paste?
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Well, my ATE Brake Assembly Paste is easy on paint and the skin of my fingers... pure brake fluid however isn't... ;)
Especially when rebuilding a master cylinder, where you have to swivel, pry and swear the rubber seal over the length of the piston, use of a more skin-friendly product comes really handy...
The paste is also very slimy, eases placing seals and parts without ecessive force or damage...

And then is there the issue to not use a DOT5 in our DOT4 brake systems, ever... hence I avoid getting silicon into my brake/hydraulic system...
(whilst I use it on parts of oil and coolant circles, as well as anything on the outside like the rubber boots covering the push-rods of clutch & brake master, or the rubber grommets of the sliding pins on the calipers...)
 
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So I removed the slave cylinder again aand disassembled it. Here are a few pics. At least part of my problem was improper assembly due go an error I made. Don't know how I managed to install the gasket wrong, but I did. I suspect that is why it was leaking. However, the slave appears to be in pretty bad shape so I ordered a new one and some new crush washers too, along with a new gasket.

I was able to remove it this time by grinding down a cheapie 8 mm wrench to be a bit flatter to fit in between the exhaust pipe and bolt head, and then gently prying the exhaust pipe out of the way with a large pry bar and removing the bolt... Here are the pics of the old slave cylinder. Beside being badly corroded, it looks as though the piston was cocked and rubbing on the enclosure. In any case, we'll see how it works when I get the new one...

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dadztoy said:
... the slave appears to be in pretty bad shape ...
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Yep, that one is gone...
The pitting corrosion would indicate water contamination over long periods... normally seen on bikes that have been in storage for one or two decades...

Should remind to overhaul/clean master and receivers and replace brake and clutch fluid at least every two years (if not annually)...
 
Yeah, ordered a whole new slave unit and gasket and copper sealing washers for hose connection. Gasket has arrived, looks like another week or so on the slave and washers... She is sitting on the Handy Lift patiently awaiting delivery of new parts.
 
Received the new slave and did the install and rebled the slave unit. All seems dry now and the clutch seems quite a bit better with just trying the throw while on the center stand. Will go for a test ride as time and weather permit. Was able to get the exhaust pipe bolt out by prying the exhaust pipe a bit with a pry bar. Not the easiest job but worth the extra effort of not having to remove additional plastic and header bolts. Thanks for all the help guys - appreciate it

Dadztoy
 
Glad you've gotten it sorted out Dadztoy. It certainly appears that your old CSC was toasted quite badly and needed replacement.

It is amazing how many ST1100 and ST1300s are coming up with this clutch slave cylinder corrosion issue these past couple of years. I guess it is just time and likely some neglect of maintenance on them (of which I was certainly quilty on my 2007).

Pete
 
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