Advanced durability with the AR-KIT43285 BlueFlex� diaphragm kit. 
Fits AR30 and AR40 pumps 
If the oil in your diaphragm pump has a milky gray color, you most likely will need to replace the diaphragms. Running a diaphragm pump with oil that is mixed with chemical can cause extensive damage to your pump. Keep this kit handy if your AR30 is in constant use. We recommend changing the diaphragms every 3 months or 500 hours of use. Features: Includes: 
Qty 2 Piston Diaphragms
Qty 4 9910- O-Ring 
Qty 1  Accumulator Diaphragm, 
Replaced HY-9910-KIT1724
 
AR30 Parts Diagram
AR30 / Honda GX160 With Parts Diagram