This is a MUST DO Husqvarna 701 modification for long distance / remote adventure riders. There is plenty of information in the forums or on Facebook groups about failures. Not only it is a dangerous failure, it is close to impossible to field fix and there are already reports of riders being stranded.
This is what the failed o-ring looks like
Fixing the slave cylinder clutch failure on Husqvarna 701
There are few options available for fixing:
- Dealer check and replacement under warranty (there is a newer part number)
- Replacing the O-ring – the fastest way
- Replacing the clutch cylinder with Oberon
Some people are reporting dealers refusing to do the work under warranty. In the better case, they ask for few hours of diagnostic time to be paid by the owner(s) and only have Husqvarna cover the replacement under warranty. In addition some people don’t trust the new part and I would tend to agree that there should have been a recall issued already.
Fixing the slave cylinder yourself
The fix is pretty simple – order the Oring replacement, it is EPDM o-ring, 22mm ID and 2.5mm thick.
Next take the slave cylinder off. Push piston out. Replace O-ring. Dab of brake fluid on new ring. Slide it it gently. Reassemble. The video below also provides a bit more details
Replace cylinder with Oberon
Some people don’t trust the Oring solution because it keeps the same cylinder in place. Thus they are going to (IMHO) extreme measures and replace the whole assembly with an Oberon product. The Oberon uses a machined seal that eliminates the problem. It’s a bolt on, bleed and ride fix.
It costs $159 and for those that need the extra piece of mind it might be a good choice. I have stuck to replacing the O-ring in the original assembly and will report if anything goes wrong