Mr22 first stage DIY service?

[reefrat]

Does anyone here service their own Mares MR22 first stages?
I have an older (heavier) MR22 in mint condition that needs servicing, it looks like the kits are available on eBay and the manual is on-line. The only first stages I have serviced are USD Conshelf and have no problem doing that so I am wondering if there are any tricks or special tools required?
Cheers

 

[TrimixToo]

I do my own. Take a picture of the order the internals go together in so you put them back in in the right order. Use a *tiny* drop of Loctite threadlocker on the DIN to first stage fitting to make it stay put. The HP seat is a "2 year, 200(?) hour" item and is not part of the service kit. The diaphragm is a replace as needed part. The DIN and yoke sintered filters are not interchangeable, so get the right kit.

 

[Bubelicous]

As TrimixToo writes making a photo is possible but better is to use an exploded drawing for both the order of your parts but also for the correct O-rings (when you use an original kit).
There are many websites that offer these exploded drawings I like to use scubaservicemanuals.com
in the older Mares kits they did not put a HP seat but if you have a newer kit the seat is also in there.

 

[reefrat]

Thanks guys, I pulled the MR22 apart a few weeks ago and followed the procedure in the factory manual. It was quite straightforward and the tri-material HP seat was unmarked (even under a loupe) so I re-installed it and the IP is rock solid at 142 psi even after a few hundred cycles (including a dive). So now it is buddied with a my also recently DIY serviced SP 156 second stage and working just great!