Randallb has a good point.
You should have no problems finding a shop in Lethbridge that can service the leveling legs. Your city is the industrial hub of southwestern Alberta! If need be Calgary is only a couple of hours away!
Based on the rig in your signature I assume the warranty period has long since expired so why ship those heavy components to HWH?
You might want to get a quote from a local shop that includes removal, service/repair and reinstallation. That way the repair shop takes all the risk for any potential damage and air or dirt in the system.
Good luck