The last time my clutch slave went out on me I think it was rather sudden. I was scooting around surface streets and the clutch pull started feeling funny loose. Then after that it suddenly lost all resistance and the bike died while stopped at a light.
Recently I have been noticing that the clutch pull isn't going all the way and is stiff at times. I can usually pull all the way to the bar but all of yesterday clutch pull felt a bit stiff and I couldn't pull all the way to the bar. The bike would also pull a lot in first w/ the clutch pulled in. In the previous week it's been on and off but it was happening all day yesterday. Now, when I went out to the bike to try today, it pulls just fine.
I recently had the clutch hub nut come loose but I tightened that up and that is not the problem this time. I pulled the clutch plates and saw nothing glaringly wrong. I pulled the slave (Yoyodyne) and noticed some black liquid dribble out of the clutch slave. Wiped it up and a few minutes later a little more dribbled out. The consistency is very watery but has a bit of a film to it. I'm thinking it might be leaking brake fluid. I recently (when the clutch hub nut came loose ~2 weeks ago) replaced the little O-ring that goes around the push rod between the engine case and the slave. I vaguely remember black liquid dribbling out of the clutch slave then too but didn't think anything about it.
Think this is a sign of a leaking slave? If not, what else do you think it is?
edit: got around to dismantling and trouble shooting. This is what I found:
The was rust around the 2 holes at the bottom the master cylinder as well as a bunch of sludge stuck in the valleys along the 2 long sides of the coffin. I emptied out the coffin and cleaned that up. Hopefully it should last me a bit longer and then I'll upgrade later.
As for the Yoyodyne, I popped it open and it spit out strips of silicon Huh? I'm not sure what it was but it came from between the piston and the outer plate. Also the outermost O-ring on the piston (big one on the left) was very distended and there was a bit of black goop mixed up lubricant that I found in the slave housing. I couldn't get my pill out to examine it but it doesn't look too bad. Did I mention that there were gold flakes in the dirty brake fluid that was leaking out of the slave?
Hopefully all I have left to do is get Yoyodyne to replace it under warranty. Hope that's not too much trouble.
So to wrap things up:
Yoyodyne received my clutch slave and is sending me replacement bits under warranty. waytogo I really lucked out in that the older monsters need an extender pill between the pushrod and the piston. The pushrod destroyed this and saved me from drilling a hole through the piston w/ my push rod. On top of that they suspect that the O-ring around the pushrod between the slave and the engine broke and let oil into the slave which contributed to the failure of the O-rings on the slave. I can verify this by the fact that the O-ring in question was totally destroyed when I last popped the slave off a couple months ago when my clutch hub nut came loose and I had taken everything apart to inspect.
So, if all goes well I'll get my return bits by Friday and can put the bike back together this weekend. Then it's Grin time! I've missed riding so much these last 2 weeks.
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I would suggest looking at your slave cylinder first . Check for obvious signs of leaking . That is what generally goes out first then losing your fluid your master cylinder goes out or at very least needs to be bled . Sounds more like your master has also gone out .
I've had this happen to me once, as did a friend of mine.
Both times the clutch SLAVE (not master) cylinder needed to be replaced, THEN the system bled.
The MASTER cylinder is the one on the firewall, that's connected to the clutch pedal arm.
The SLAVE cylinder is bolted to the bellhousing (between the engine and the transmission).
BUT, it COULD me the master cylinder also.
Whichever is bad, there should be some fluid leaking to give it away.
No, you don't have to replace the clutch. The fluid on the passenger side sounds like where your slave cylinder is? But it may be fluid running down the outside of the line to there...because I think the problem is your clutch master cylinder. The fluid on the pedal is the reason. Feel the carpet behind the pedal and all around there for wetness. If it is clutch fluid, your master cylinder will have to come off for repair or replacement. Any time you have fluid there, it's a sure sign of clutch master cylinder failure. Whether it's the master or the slave cylinder (or both), you should be able to handle it. The master cylkinder is a little more difficult than the slave to replace, but doable. Remove the line fitting, 2 bolts holding cylinder to firewall, and inside the car is the clutch rod from the pedal to the cylinder that needs removing. That's about it. After you get the system free from further leaking, all you need to do is bleed the slave cylinder so your clutch works again. Good luck.
you need to inspect the clutch hydraulic system to look for a leak.check in the truck were the master cylinder bolts to the firewall as if the master is leaking out the back it will show up the leak in this area.check around the master under the hood to see if there are signs of it leaking.check at the transmission were the slave cylinder is as this is another place they leak.if you have to fill the master because its empty there is a leak somewhere.you also may need the clutch replaced as the slave cylinder moves out to adjust for wear of the clutch which will lower the fluid level but not cause it to be empty.you will have to bleed the clutch system at the slave cylinder,there should be a bleeder screw to do this.if you find the leak in the clutch system you will have to replace the system as some come complete master lines and slave.some come with just the slave,lines,master as separate components.
Hello Henry. There are a couple of possibilities. First of all, check the fluid level in the reservoir under the hood. It is mounted on the firewall opposite of the clutch pedal. Remove the cap and pull the rubber boot out to fill it (with brake fluid ONLY!). If it is empty there is a leak. It is usually one of two places. The master cylinder or the slave cylinder. The master is mounted to the firewall and has a piston in it that pushes fluid through a line to the slave cylinder that is mounted between the engine and transmission. Look for signs of fluid leakage and that will generally tell you which one needs repair. The master on the firewall will usually leak on the inside of the truck where the rod from the clutch pedal goes to it and the slave will usually drip out the front of the transmission.
Is the clutch fluid reservoir empty? If so you have a leak as the fluid will not appreciably go down even with years of use. Check around the foot well inside the car and around the reservoir tank for signs of fluid loss. If the foot well carpet is soaked it is likely the master cylinder seal needs replacing. If the area around the reservoir is wet then the union from the reservoir or to the pipe connected to the slave cylinder needs to be tightened from the reservoir. If there is no sign of a leak then the leak is associated with the clutch slave cylinder, either at the pipe union, the bleed nipple or the cylinder seal. The first two will be obvious to identify on the cylinder itself. The seal leak may well be indicated by drips coming from the junction between the gear box bell housing and the engine block. The slave clutch can usually be refurbished with a repair kit that includes a new seal. Take care when removing the clutch fluid feed pipe not to bend or damage it so that it can be easily re-used when reinstalling the salve cylinder.
Possible solution! Daewoo Lanos 98-99
Had the same problem suddenly the clutch pedal went rock hard!
The clutch was around 3 months old.
Mechanic checked - Master, Slave, Clutch Components, and inside the box, all looked okay.
Turned out the top arm of the clutch pivot rod had twisted, replaced pivot rod around AU$100.
Sounds like you have a leak .... a bad master/ slave cylinder .... that car has a hydraulic clutch system you may see oil dripping, much cheaper than a new clutch ... pumping it may help shift until it empties out entirely ... check the reservoir ...