Rebuilding/Revalving the Ohlins TTX25 MkII damper

[Slips]

Hey guys just wondering if anyone has rebuilt or revalved these shocks before? I will be purchasing the necessary kits to do so but would like to hear some feedback from people who have attempted this before.

Specifically, was the process relatively simple to complete or would it be wise to consider outsourcing? Is there any other documentation available (possibly that comes with the kits) - i have come across a workshop manual as well as a pdf with fill instructions however upon glancing at it, i think i'd need more instructions to be comfortable attempting this myself.

Thanks in advance for any responses.

[Claude Rouelle]

And you are?

[dmacke]

Our team rebuilt one of our shocks this year and as long as you take your time and follow the directions it is not too bad. Be careful of some of the tools. We had one break on us so we had to fly by the seat of our pants but it wasn't bad. If you can build a racecar you can rebuild shocks.

[Kevin Hayward]

Slips,

What is the reason for the rebuild, are you just regassing and replacing oil, or revalving?

The TTX25 is a great damper and has a good adjustment range, but we have noticed that they do have a tendency to lose gas pressure. I was surprised that they didn't use a different valve for gas filling. This might be something you consider retrofitting if you rebuild. You also may want to consider what you want to fill the accumulator with. Air is super easy to do, nitrogen will take a lot more stuffing around to get setup with a tank and regulator etc.

As with just about everything FSAE try to avoid outsourcing where possible. In this case you would lose a valuable opportunity to learn a lot more about dampers. In the short term this may slow your team down and use some extra resources. In the long term it will almost certainly help.

Kev

[iwatts]

Our team is also looking into rebuilding our MkII's. The seals have begun to fail and the dampers are losing performance repeat-ability/'tune-ability'. I'm curious if anyone else (or OP) had anymore input on rebuilding these?

Personally our only concern with rebuilding them is damaging something or performing the rebuild improperly such that we will end up having to pay to have it professionally performed regardless. I'm also curious about the turn around time for rebuilding these yourself. How long would you say it took to rebuild each damper?

Thanks for any input.

kW