Cannot bleed clutch!

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Jun 2, 2012 | 07:10 PM

sethc24

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Cannot bleed clutch!

Guys i have a 1990 f250 zf-5 300 ci inline 6, 4x4. And i just replaced the clutch, flywheel, and concentric slave cylinder. I cannot seem to bleed the clutch. I tryed the conventional way first. Then i tryed bench bleeding the master cylinder. Did not work. I tryed taking off the clip and sliding the piston assembly out slightly to let air out on the back of the master cylinder. Still did not work.????? Suggestions?

Jun 2, 2012 | 07:41 PM

GNR22

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Joined: Mar 2011

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From: Central Wisconsin

Hey if you find out a good way to do it, let everyone else know. There was a write up on here where a guy bought a plastic tub thing and filled it with hydraulic fluid and filled and bled the master and slave cylinder in there and i guess it worked well.

Jun 2, 2012 | 07:57 PM

KC92F150

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Joined: Oct 2004

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From: Las Vegas

Quote:

Originally Posted by sethc24

You can buy the reservoir, line and slave cylinder as a pre-bleed unit, it may cost a few bucks more but it is well worth the cost.

Good luck

Jun 3, 2012 | 12:40 AM

sethc24

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You mean the master cylinder? and the slave?. The slave is internal. So this means i might have to pull the tranny again?

Jun 3, 2012 | 05:57 AM

mpc07005

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Joined: Jun 2011

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From: Milford, CT

Get a vacuum pump (like for brake bleeding). Give that a try, then start pumping the clutch to clear the MC.
-Mike

Jun 3, 2012 | 06:01 AM

joshh

Tuned

Joined: Feb 2009

Posts: 326

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From: near charlotte nc

ive had the best luck reverse bleeding them using a pressure type pump to push the fluid back up from the slave to the master

Jun 3, 2012 | 07:44 PM

jas88

Lead Driver

Joined: Feb 2002

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From: Greater Austin, Texas

The 460/PSD slaves are the hard ones to bleed. The internal slave like you have, I have never had a problem with that. You just open up the bleeder and let it gravity bleed for a while, making sure to keep the master cylinder filled up. Close it up and go on down the road, at least that's how it always works for me.