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Hydraulic clutch problem

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Paul

04-28-2003 23:33:25

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I have a 94'Ford pick-up with a hydraulic clutch.This thing releases fully from about a 1/2 inch or less from the floor. After it's been run for awhile the trans grinds like the clutch is not fully dis-engaging. Any thoughts on this? Clutch master cly. or slave cly. bad? Maybe both? How can you tell which is bad? Could there be air in the system requiring a longer stroke of the plunger? Lucky for me (maybe) the slave cly. is an external mount.Got to get 'er fixed, its driving me nuts. I know it's not a tractor, but at least it's a Ford. Thanks, Paul

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ZANE

04-30-2003 19:03:52

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

If the slave cylinder is bad it is going to be leaking fluid. If it isn't leaking it isn't bad.

Most external slave cylinders have some way to adjust the stroke of the slave cylinder.

When the master cylinder is bad the clutch will engiag itself while you are holding the clutch pedal down or it just won't disengage the clutch at all.

I think you just need to adjust the linkage between the slave cylinder and the clutch.

Some of the foriegn made hydraulic clutches are not adjustable even if the slave cylinder is external. DUMB!

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Hobo,NC

04-29-2003 10:55:09

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

If you find the bushings worn in the clutch linkage remove the brake and clutch pedal as a assy. and replace all bushings. Its not that that bad a deal to get out.

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Hobo,NC

04-29-2003 10:51:08

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

The OEM slave has aallen set screw were the bleeder would be. Its a trick to try and bleed it their.
The replacment slave will have a bleeder. So if you get that far bleed it above the master first. i use a vacuum pump to bleed mine but thats a different storie. The slave displaces more fluid than the master and the line so most remove the slave from its mount and let the piston extend and push it all the way in a few tims to remove the air. The piston will not blow out the end of the slave, it has a stop. You will need some one to replace fluid in the master as the slave extends. I always replace the line when I replace the master and slave. Some have a check valve in the line, that makes it a pain to bleed.

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Jim Cox with a '95 F150

04-29-2003 07:09:32

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

be thankful for the EXTERNAL slave cylinder. It ALWAYS takes two people to bleed the system, the master cylinder is less than $50 in WAGNER brand, and some of us just top it off once a month cause we like to have a clutch on the way to work. The geniuses at MAZDA that put the slave inside the bell housing in '95 better hope I never meet them face to face. It's not gonna be pretty. makes me appreciate my 1941 9N technology a little more.

Jim Cox
starter rebuilder guy

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Paul

04-29-2003 06:56:32

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

Well unfortunately there are no bleeder screws on this type system. The book says, what liitle it does say, that its a bench bleed for the slave and a gravity bleed for the master. I shall wedge myself under the dash and locate the pin and bushing and check those. It will probably be as Dell says, most definately perverse. I'll keep you all posted on progress,Thanks, Paul

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Rick H. Ga.

04-29-2003 04:51:59

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

Hi Paul,

If you replace the slave cylinder, a word of advice, it can be tricky to bleed the air out of it. You will need two people to do it. Simply depressing the clutch peddle a few times and opening the bleed port won�t suffice. You have use some kind of tool to plunge the hydraulic rod all the way into the cylinder before opening the bleed port, which the clutch peddle alone will not do until it is bleed properly to start with. HTH. Rick H. Ga.

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Hobo,NC

04-29-2003 06:00:00

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Re: Re: Hydraulic clutch problem in reply to Rick H. Ga., 04-29-2003 04:51:59

Or remove the slave cylinder with line connected and hold it above the clutch master cyl. and bleed it. i would look at clutch linkage under dash first. Any wear needs to be addresed first.
i always remove the rubber clutch pedal stop and have at times had to grind so off the clutch pedal were it hits the stop to get more pedal.

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JimTN

04-29-2003 03:33:44

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

Go up in under the dash, there is a shaft with nuts on both ends and arms. One of those arms has a pin and teflon bushing which is now gone and the pin is nearly worn thru. Ford sells the arms and bushngs, you will have to take the nut off that end and drive the arm off.

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Dell (WA)

04-29-2003 00:07:03

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Re: Hydraulic clutch problem in reply to Paul, 04-28-2003 23:33:25

Paul..... ...while it could seem like its a 50/50 chance that whichever one you replace first (master or slave) it'll be the wrong one, but Fenagales Law of Perversity of Inanimate Objects sez its going to be the one thats hardest to get to. If they're both equally difficult to get to, my experience sez its the slave..... ..Dell

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