clutch problems

109 diesel - drive for a while and when i go to change gear, the pedal just gives way to the floor. if i pump it - it then starts to work. Fluid is still there. appears to be no leaks. - Any ideas?

Master cylinder seals

Air in the system?

if no leaks around master cylinder and slave , then there is air in the system

Bleed it and retry.

Loook under the boots (rubber bits on the ends) of the master and slave cylinders. if the area is wet then you need to rebuild the cylinders. cheap and cheerful - and not at all hard to do.

The other thing that you might have an issue with is ballooning of the flex line from the bulkhead to the slave cylinder. if it's well and truly perished sometimes these blow up rather than directing the hydraulic pressure where it should go. The multiple pump just provides more pressure to compensate for what the line lost.

Check the flex anyway the connections to them can leak.

ajr

thanks guys - will do.