940 clutch problem

[RichardRichard]

What parts are needed to stop clutch pedal loosing pressure randomly?
Thanks

[360beast]

Originally Posted by RichardRichard

What parts are needed to stop clutch pedal loosing pressure randomly?
Thanks

Diagnose the issue before firing the parts cannon at it, it's most likely the slave cylinder is leaking, check if your brake fluid has gone down.

[RichardRichard]

Had clutch or brake fluid changed 2 weeks ago but problem got worse. It's happened about 3 years ago also. A new slave was fitted then but the mechanic said he couldn't get hold of another required part. Any idea if the name of that part please?
Thanks

[940volvoman]

It could be that air has somehow got into the slave cylinder,especially if the fluid hasn't been changed for a while.

All parts for a slave cylinder overhaul are available online and are fairly cheap.

I serviced mine last year and has made a world of difference,though the pedal is going spongy again.My brake fluid didn't go down but the pedal didn't bite, particularly after the fluid got hot.

[classicswede]

Slave cylinders are easy to get hold of https://www.classicswede.org/shop/lu...and-850-models

[Rversteeg]

It can be a bit difficult to get the air out of the system, as unlike the braking system, you cannot easily put the system under enough pressure by stepping on the pedal. You need to pressurize the system with external pressure.