The way I do my shocks is...
1.. Empty and clean the shock body, piston, and cartridge area.
2.. Fill the shock body to the bottom of the internal threads.
3.. With the shock shaft fully "out", insert the cartridge system in the body and tighten "finger tight".
4.. Oil will be released as you do the above.
5.. Clean the excess oil.
6.. Loosen the cart. about half a turn
7.. SLOWLY!!! push the shock shaft in all the way. Oil and air is released
8.. With the shock shaft still in, tighten the cart. fully!!!
9.. Clean the excess oil again.
10. Re-assemble the shock.
Do all the above steps with the shock held, with the shaft pointing up.
It's not the way everyone does their Losi shocks, but it works for me.
