Clutch Slave Piston Not Moving After Replacement of Master/Slave Cylinders

[sp73]

My clutch went out while driving a few weeks back; I managed to keep 4th until I got home but pulling in the driveway that went too. Getting under the truck I saw the slave piston was very wet and of course my fluid reservoir was empty.

I replaced the Master and Slave as well as the hose between the slave and hardline. After topping off the reservoir with fluid and doing a two person bleed routine I have yet to have any pedal pressure whatsoever. Fluid is coming out of the bleeder screw in a small stream as the clutch pedal is depressed.

The slave piston is not moving at all.

I used Aisin parts from #cruisermatt and have double checked for leaks in the line. I did replace a small section of the clutch line as it was damaged during removal.

Looking for help of course!


EDIT: Maybe I am just not doing it long enough to get the air out?

 

[2mbb]

Because the master is higher than the slave fluid will drain out the bleed screw without much pressure being developed. I would suspect the master is not developing pressure.

Take it out, do an inspection of the cups/seals and maybe see if you can get it to develop pressure on the bench.

 

[pv40]

Did you bench bleed the MC??

 

[sp73]

Did you bench bleed the MC??

I did not. Sounds like that's a must? I just looked up the procedure - I will do this first and report back if need be.

Thanks!

 

[sp73]

Well - still no go here. Bleed the master until no bubbles. I am barely getting anything out of the bleeder screw on the slave. No pressure is building in the pedal.

Line restriction?

 

[Pighead]

clamp off the soft clutch hose, can you still pump the clutch pedal?

 

[sp73]

I am in business. It ended up being the pedal distance to the floor. I've never had reason to check or alter it; I pulled the new master and measured with a caliper against the old and made the distance between the lock nuts and the end of the cylinders match. Pressure built after three pumps.

Thanks all.