Clutch pedal suddenly hit the floor and stays there :(

[raymix]

Hi,

My GMG 1986 (diesel converted to gaz motor) is my everyday and work truck.

Since 2 weeks, I wa hearing some high-pitched noise when I released the clutch pedal.
No matter if the clutch was engaged or neutral, even transfert case or any shift, as sson as the pedal
was released, that noise appears.

I noticed that when I was pushing just a little bit the pedal (like 1 inch) , the noise disappears.
One of my friend suggested me to check the oil level (yeah it's hydraulic).
It was almost empty so I pour brake fluid and checked if it was okay, the sound was faint but still there.

So I suspected air in hydraulic lines, no biggy I said to myself, I'll bleed it this weekend ...

Today, this afternoon at work, I started the truck but the pedal clutch suddenly went down and never
came back, leaving the clutch always engaged. I immediatly stop the engine.

I had so put the transmission on L (this is a 4 speeds) and crank the motor (I hacked my neutral safety switch so I don't have to push the pedal to crank) and went home, shifting thru gears without using the pedal clutch, just by listening to the motor revving at the right time ( I know it could be harmful if I missed but I had no choice ).

I went under the truck and the slave master cylinder has brake fluid drops, could it be broken ?
Is this an expensive part ?

Thanks for any helps ! I need my truck for working !
Also, I've ordered a 4" lift kit and it should be ready for Friday, I wish I could fix the truck this weekend

Friendly,

Ray.

[joesgarage71]

 First take your inspection cover off the bellhousing and have a look inside if everything looks ok, then bleed the slave cylinder,Your High pitched noise was your throwout bearing taking a crap. Might be time for a new clutch.

Steve

[raymix]

I forgot, for your information:

Truck has been to a mechanic shop in August 2006 for a complete new clutch kit installed so I doubt this
is the problem, all gears works fine ( as I said, I shifted thru gears without clutch pedal ).

Ray.

[Captkaos]

If it was squeeling and stopped when you pushed the pedal in, the throwout bearing is gone regardless.

[Blazin]

Did they use a reman or discount parts store clutch? I don't think the old adage you get what you pay for is more true when it comes to a clutch!

[VileZambonie]

Which transmission is in your truck? It sounds like the slave or master has failed. I would replace them both. Your squeaking is either the pivot ball to fork Galling (just needs to be greased) or the release bearing is bad. If the clutch is new the release bearing is probably ok. To determine if it is the release bearing or pivot galling just grab hold of the fork with the engine running to keep it from vibrating and see if the noise stops.

[raymix]

I don't know which brand or type of clutch the mechanic shop put in.
I paid 350$ CDN for the clutch kit (+working time).

The slave ain't moving at all, the pedal is all the way to the floor, looks like the master aint working at
all. Got my old 3/4 ton pickup with both master and slave working fine so I think, this weekend,
I'll take the whole setup and switch it with the defective one, I'll see what happens.

Thanks for the help.

Ray.

[raymix]

Today, I installed the whole setup from another pickup , master and slave cylinder in good working condition. When everything was done, I pushed the pedal down and the linkage rod on the master
cylinder bent ! I took a picture :



I think the bearing is really out of business. I don't have any ideas why it's so hard to push the fork,
looks like it's stucked. Is it normal that a fresh throwout bearing (8 months) is already worn out ?
Like I said, it's my work truck and barely made 3000 km since the new clutch kit was installed.

Thanks for the help guys.

Ray.

[VileZambonie]

I doubt it's your release bearing if you hooked everything up correctly and then bent the pushrod like that. You must have had to push pretty hard for that to happen so I assume something is jammed up pretty good in there. Start pulling the trans.