HPPAMZ Oil Filter 23424922/23759871 COOLANT FILTER CHANGE PROCEDURE 1. stop the machine, electrically isolate and vent all trapped pressure. 2. loosen the oil filter with the correct tool. 3. remove the oil filter from the housing. 4. place the old filter in a sealed bag and dispose of it in a safe way. 5. clean the mating face of the housing taking care to avoid any particles entering the machine. 6. remove the new hppamz replacement filter from its protective package. 7. apply a small amount of lubricant to the filter seal. 8. screw the new filter down until the seal makes contact with the housing, then hand tighten a further half-turn. 9. start the compressor and check for leaks. 10.reset the oil filter service warning.