OBA will blow the actuator apart unless you regulate it down to about 2.5psi, plus an electrovavle and pressure switch. The compressor has the regulator built in, and has the release valve also. Get the compressor that goes with the diff. All it needs is simple switched 12v and a ground. Turn it on, and it runs up to the regulated pressure and cuts off. If it runs again, the actuator is leaking, and there are none left in dealer parts stock. When you kill the compressor power, the release vavles opens and vents the pressure.

Not responsible for advice not taken...