Clutch problem.

[stevem]

Hi. I am still having problems with my clutch, can anybody shed any light on the problem. I have a MK111 Sumo. I had Magnum Eng do a Hydrolic cluth convesion for me, and have never been able to maintain a good clutch pedal. I have bled the system countless times and even extended the push rod from the slave cyl. Sometimes it will engage gears ok other times i have to pump the pedal a couple of times. When out on the road coming up to junctions / roundabouts ect more often than not i have to pump the pedal two or three times before i can drop it down a gear. Has anybody else had this problem with a magnum conversoin ?. Any help much appreciated. Cheers Steve.

[jrv8]

Hi ,
Have you fitted the slave cylinder the correct way up ?
Jim

[stevem]

Hi Jim, Yes slave cyl fitted correctly, bleed nipple to the top. Very pleased with engine BTW. Cheers Steve.

[stu e]

Hi Steve
I had my clutch conversion supplied by Magnum, and couldn't get the clutch to disengage. They questioned my bleeding the system ( I put litres through it with the bleed nipple to the top) and suggested araladiting a nut to the end of the slave pushrod. I never tried sticking a nut on the pushrod but ended up fitting a bigger bore master cylinder.
My problem was the clutch never worked, I've heard of people taking the slave cylinder off to bleed the systrm but haven't tried that myself.
Stu.

[stevem]

Originally Posted by stu e

Hi Steve
I had my clutch conversion supplied by Magnum, and couldn't get the clutch to disengage. They questioned my bleeding the system ( I put litres through it with the bleed nipple to the top) and suggested araladiting a nut to the end of the slave pushrod. I never tried sticking a nut on the pushrod but ended up fitting a bigger bore master cylinder.
My problem was the clutch never worked, I've heard of people taking the slave cylinder off to bleed the systrm but haven't tried that myself.
Stu.

Hi Stu. I have tried bleeding it with the slave cyl removed. Was yours ok when you fitted the bigger master cyl. Steve.

[jrv8]

Originally Posted by stevem

. Very pleased with engine BTW. Cheers Steve.

Thanks for that Steve, and I'm glad you're happy with it.
As stu_e has suggested , it could be a mismatch in master cylinder to slave sizes, and changing to a larger bore m/cylinder would probably solve it.

Jim

[wilf]

From the symptoms described - i.e. needing to pump the pedal to get clutch clearance, I would go checking the hydraulics some more. Could be a duff master cylinder? Also check the geometric relationship between the clutch pedal/pushrod/master in case there is significant side loading on the master cylinder piston. Do you ever get any fluid out of the back of the master cylinder?
Does the system lose hydraulic fluid at all?

[stu e]

Originally Posted by stevem

Hi Stu. I have tried bleeding it with the slave cyl removed. Was yours ok when you fitted the bigger master cyl. Steve.

Yes mine has worked fine for 3 years now, but as i said my clutch never worked, were as yours semms to be intermittent.
As Wilf says it could be a duff master cylinder, I think TonyM had that problem a while back, the non return valve in the master wasn't sealing, and pushing the fluid back into the resevoir, when you press the clutch does the fluid level rise?
Stu.

[stevem]

HI. The system is standard LT77 Gearbox, SD1 slave cyl, pushrod. I have just checked and no the fluid doesnt rise in the res when i depress the clutch pedal, and is dosent lose any fluid. It seems to point to the master cyl.

[tonym]

Originally Posted by stu e

I think TonyM had that problem a while back

Yes, A brand new master cylinder was faulty, exchanged it and worked fine after that