Cant bleed my clutch

[Mista510]

So I get home from school and decided that today ill bleed the brakes and clutch. Brakes done but clutch pedal goes straight to the floor so im looking at the pedals.....is something wrong or missing here?

 

Then i not sure what this is called but im sure its not working right...what is it and does it prevent me from bleeding the clutch?

[DISLEXICDIME]

diod it work before?

[banzai510(hainz)]

You look to see if fluid in the clutch master resivoir?

 

fill it .

 

rebleed clutch.

 

 

You said you bleeded the brakes?

So Can I assume you know how t blled the slave cylinder?

 

I dont know why you showed us photos of the clutch pedal. We know how it works.

[Mista510]

You look to see if fluid in the clutch master resivoir?

 

fill it .

 

rebleed clutch.

 

Master was filled after the brakes were done. I was doing this alone so I connected the my bleed line to the bleeder screw, opened it, pumped the clutch three time and held it down with a curtain rod. Looked for brake fluid to go through the line but nothing. Pumped the clutched again and held down again but it showed no sign of change.....

 

 

 

[banzai510(hainz)]

By myself I use a clear line in to a clear bottle. I open the bleed screw and I pump the about 3 times fuill resivoir pump 3 times and see if no air bubbles and then lock the bleed screw.

The use a clear line as once you thing the bubbles are gone if you let up on the pedal if it does suck fluid back it will be FREE of bubbles as thats why you use a clear line.

 

OK I seen this happen to other cars. Some times when you bleed a old master it could break as when you push all the way down the rubber seal gets cut on the ridge that was made as you never really use all the travel on the master.This happen more on Brake masters.

 

Another thing is lock the bleed screw and push the pedal and see if tiny airbubbles come up when you push the pedal every time then the master is bad.it cant push fluid.

 

also try this.Open bleed screw at slave. then go to master and hold yout finger over the hole while somebody pushes the pedal. do this a few times. YOu should fill fluid push out. if yes then re hook back up and rebleed.

[Mista510]

Ok I still cant bleed this system so I removed the clutch slave from the tranny, cleaned it, reinstalled it, and still no air or fluid going through the system. So how do I tell whether the Master is bad or the line is clogged?

[datzenmike]

If the line was clogged the clutch peddle would be rock hard to push on.

 

Remove the clutch master and see of the piston in the end, is in all the way. If it hasn't returned, it may have seized up in the bore.

[Mista510]

If the line was clogged the clutch peddle would be rock hard to push on.

 

Remove the clutch master and see of the piston in the end, is in all the way. If it hasn't returned, it may have seized up in the bore.

I will and will inform you of the finding

[metalmonkey47]

At the price of clutch hydraulics for Datsun's, I'd just replace it. If you're on a tighter budget, troubleshoot, but seriously, if you don't know when the last time (if ever) that it was replaced, might as well just do it.

[H5WAGON]

Remove the slave cylinder from the line....can you pump fluid out now?

 

Clutch hard line may be blocked.....rusted.

 

Unhook the master cylinder from the hard line.....can you blow air thru the hard line?

 

Rubber hose could be rotten inside...also. Replace if questionable.

 

 

probably just a bad master.....like stated.

 

wasted seals inside= no push the fluid.

[justin 620]

I'm with monkey on this one. Not much can go wrong with the slave, so replace the master and that should fix it. If not, get a new slave too... Trouble shooting for a week won't fix a broken part.

[n2paint]

Im having an issue similar today on my 71 2dr. I replaced the clutch master, slave and lines including the rubber hose a few months back. Today we got around to be able to bleed the system but are unable to get fluid from the master down to the slave. I unscrewed the line at the master, pumped the pedal and still nothing coming out, also tried pulling the bleeder out of the slave to try and get fluid to run out and nothing, but I can hear air when the pedal is released going back into the slave bleeder. So strange. 

Any ideas?

[datzenmike]

1/ Did you bench bleed the master? Get about a foot of old brake line. Connect to the master and bend the other line back up, over and into the master reservoir. Preferably enough to be below the fluid level in the reservoir. Begin pumping the clutch pedal and watch for bubbles. Continue until all air is pushed out into the reservoir. The master is now bled, connect the hard line to the slave back up and proceed with bleeding. Keep the master full.

 

2/ Make sure that you have 1/16" of loose or free clutch pedal play before there is resistance felt.

[510T]

Try to ziptie the clutch fork to the slave so it won't move, then pump and bleed.

[banzai510(hainz)]

try putting your finger over the hole inside the master and have soembody pump the pedal and then it might shoot out. it might creat a vauum from the other side to suckin fluid

[edekalil]

Im having an issue similar today on my 71 2dr. I replaced the clutch master, slave and lines including the rubber hose a few months back. Today we got around to be able to bleed the system but are unable to get fluid from the master down to the slave. I unscrewed the line at the master, pumped the pedal and still nothing coming out, also tried pulling the bleeder out of the slave to try and get fluid to run out and nothing, but I can hear air when the pedal is released going back into the slave bleeder. So strange.

Any ideas?

Going through this right now with my 72/510, was a auto now a stick.

[edekalil]

Got mine working, took the hard line loose from master and flexible from slave. Then ran a wound guitar string through the hard line like a rotorouter through bought ends, I guess it freed up some crap in the line. Bled it and now clutch.