I will say to make sure everything is really clean. I'd run lacquer thinner or Brake Kleen through each component and then blow it out with compressed air. That way there are no contaminants in the system. You'll also want to install a new dryer/accumulator and replace any o rings or rubber seals at the joints in the system and compressor.
1995 4Runner - V6 - 5 Speed
Rear ARB, Manual Hubs, Front TruTrac, Marlin Transmission, ARB Front & Sonoran Steel Rear bumpers that have saved my life!!