If possible find a MICO dealer in your area. I use Fluid Power Inc. in York, Pa. 717-252-1535 Jaldinger@fluidpower.com
You will be looking for MICO repair Kit # 02-001-029. Big blue top vent plug may need to be replaced as they use a different
high pressure relief valve in the new kit. Replacement plug is steel not original aluminum. Good Luck Terry