I would think if a shock or strut is leaking, seals need to be replaced before any recharge is done.
Motor cycle shocks have high pressures as well. High enough that you want the proper tool to do it. If I remember right, the tool had two valves, one on the supply tank and one that screwed onto the shock with a pressure guage in between. Attach to the shock, open that valve, then slowly open the supply valve till you get the desired pressure, close the shock valve, then close the supply valve and bleed off the residual pressure then remove the tool.
Motor cycle shocks have high pressures as well. High enough that you want the proper tool to do it. If I remember right, the tool had two valves, one on the supply tank and one that screwed onto the shock with a pressure guage in between. Attach to the shock, open that valve, then slowly open the supply valve till you get the desired pressure, close the shock valve, then close the supply valve and bleed off the residual pressure then remove the tool.
