Step 1: Jack up your trailer using appropriate jacks.
Step 2: Remove the rubber plug from the grease cap.
Step 3: Place the nozzle of the grease gun onto the zerk fitting found behind the plug. Be sure the nozzle is completely engaged onto the grease fitting before continuing.
Step 4: Begin pumping new grease onto the fitting using a grease gun. To evenly coat the bearings, spin the hub during grease application. The previously used grease will begin to exit the bearing cavity through the outer bearing.
Step 5: Remove the grease gun as the new grease begins to seep from the fitting.
Step 6: Clean up excess grease with a paper towel or shop rag.
Step 7: Push the plug back onto the grease cap.
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