The Comet APS101 and APS121 Pump Repair Kit (5026.0089.00) includes replacement diaphragms and o-rings that are intended for use on the Comet APS101 and APS121 Diaphragm Pumps.
Replace the diaphragms once you notice the oil in the oil sight glass has a milky grey color, otherwise you can risk potentially damaging your pump beyond repair if you continue to run the pump with worn out or torn diaphragms. We suggest replacing diaphragms every 500 hours of use or once your spraying season has concluded.
The Comet APS101 and APS121 Pump Repair Kit includes: