Mud-club

Vehicle & Technical => Discovery => Topic started by: barmiebrumie on October 05, 2007, 21:33:39

Title: Clutch AGAIN ** SORTED **
Post by: barmiebrumie on October 05, 2007, 21:33:39: Lost clutch pedal the other day tried to bleed no joy, just put new slave cylinder on & still no good,

when pedal is pressed down I can almost hold the bit inside the slave cylinder with my finger :oops:

Any idea's

Thanks in advance
Title: Clutch AGAIN ** SORTED **
Post by: J13 MUD on October 05, 2007, 23:03:56: I had a similar problem last week with my sons Defender 300TDI, not sure if the symptoms are exactly the same but it may be worth checking. The clutch pedal went solid and failed to operate the clutch at all, after checking the usual things I removed the slave cylinder and could not feel the clutch fork, I decided the only thing to do was to remove the gearbox to see if I could find the problem. It soon became apparent what the problem was, the pivot ball had completely worn through the clutch fork, this then caused the piston in the slave cylinder to extend to its maximum which made the clutch pedal go solid.
I hope this is not the case with your Disco as it is much easier to remove the gearbox on a Defender than a Disco, by the time I repaired all the siezed bolts and screws and got it back together about 15 hours had passed!!!

Good luck
Title: Clutch AGAIN ** SORTED **
Post by: Les Henson on October 05, 2007, 23:35:47: Put a clamp on the clutch flexi pipe and then try the pedal. If it still does it, then air in the system or the master cylinder needs attention.

Les.
Title: Clutch AGAIN ** SORTED **
Post by: dazzawhipple on October 06, 2007, 08:09:26: John

Is the slave cylinder bleed screw above the inlet or below the inlet

Make sure its above the inlet.............because bleeding can be be problematic...

If not check your master then gearbox off for the pivit arm..

Darren
Title: Clutch AGAIN ** SORTED **
Post by: Richie_EB4 on October 06, 2007, 09:05:43: Quote from: "J13 MUD"
I had a similar problem last week with my sons Defender 300TDI, not sure if the symptoms are exactly the same but it may be worth checking. The clutch pedal went solid and failed to operate the clutch at all, after checking the usual things I removed the slave cylinder and could not feel the clutch fork, I decided the only thing to do was to remove the gearbox to see if I could find the problem. It soon became apparent what the problem was, the pivot ball had completely worn through the clutch fork, this then caused the piston in the slave cylinder to extend to its maximum which made the clutch pedal go solid.
I hope this is not the case with your Disco as it is much easier to remove the gearbox on a Defender than a Disco, by the time I repaired all the siezed bolts and screws and got it back together about 15 hours had passed!!!

Good luck

Very comon problem.........had one go with a clutch that had only been fitted 4months.........just waiting for the manufacture to get back to us.........some people weld a cover plate over the back of the arm to strenghten it.
Title: Clutch AGAIN ** SORTED **
Post by: Les Henson on October 06, 2007, 09:14:09: A reinforced clutch fork:-

What happens to them:-

(http://forums.lr4x4.com/uploads/1144869713/med_gallery_2_95_274446.jpg)

Stengthened with a 2.5mm plate :-

(http://forums.lr4x4.com/uploads/1150116333/med_gallery_2_95_153469.jpg)

Les.
Title: Clutch AGAIN ** SORTED **
Post by: barmiebrumie on October 06, 2007, 20:06:26: All done :D ,

Had to replace the master cylinder & damper, had a real probelm bleeding though ended up ' drip bleeding' in the end (open bleed nipple & keep topping up for about an hour),

I had replaced the gear & transfer box's about 3 months ago, (R380 gearbox & 1.41 transfer box) while that was being done I welded a bar on the fork,

Thanks for all the advice
Title: Clutch AGAIN ** SORTED **
Post by: meader on October 06, 2007, 21:00:55: i have just replaced my clutch and just put the box back up problem now is ever time i press the pedel it stays on the floor and i have to reach down and lift it back up by hand but it was working fine till the clutch went
Title: Clutch AGAIN ** SORTED **
Post by: Les Henson on October 07, 2007, 08:40:32: On a 300TDi Disco the clutch pedal 'goes over' if there is air in the system, so when you are bleeding it you have to press down and pull up. Once the air is gone the pedal doesn't travel far enough to do this.

Les.
Title: Clutch AGAIN ** SORTED **
Post by: meader on October 07, 2007, 10:20:27: i have tryed bleeding it for20mins still the same im getting no pressure build upwot so ever so i going to have to take the box back out i think
Title: Clutch AGAIN ** SORTED **
Post by: meader on October 07, 2007, 20:31:31: i have taken the box down again checked every thing and bleed the sistem i have gone through a big bottle and i still have no clutch any body have any ideas on wot i could be
Title: Clutch AGAIN ** SORTED **
Post by: Sharpshooter on October 07, 2007, 21:46:49: A little tip i have found useful when bleeding discovery clutches.

Jack the front up by about a foot. Helps the air to get out (going uphill). :)
Title: Clutch AGAIN ** SORTED **
Post by: discoverytdi on October 07, 2007, 22:00:12: Quote from: "Sharpshooter"
A little tip i have found useful when bleeding discovery clutches.

Jack the front up by about a foot. Helps the air to get out (going uphill). :)

Good tip I have the same problem,
now where did I put that trolley jack :-k
Title: clutch bleeding
Post by: oxymoron on October 07, 2007, 22:09:01: Try filling a wesco oil can with brake fluid, attach to the bleed nipple with a length of screen washer pipe,slacken the nipple and pump away.
When the master cylinder reservoir is filled, you should have an air free clutch!
Or try the gunson easy bleed!