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Tools required: 1. Screw driver 2. Brush
Take the upper housing off and put it aside
Disconnect the terminals of the coil
Loosen the u-nut at the center of the diaphragm then remove the used diaphragm
Replace a new diaphragm and mount it on the activating arm with a u-nut and washer into their position.
Replace another new diaphragm and press the rim of the diaphragm into the ring ofthe coil frame perfectly
Put the diaphragm housing back on its position and mount it with the 4 screws tightened firmly
Constrict the tubes each with a clamp at the end
Clean the coil cover with a brush
Put the aluminum upper housing back and mount it with the four screws tightened firmly