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Place a shop towel over the lever body to prevent the piston assembly
spring from forcefully ejecting.
Use your hand to push out the contact adjust knob.
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CAUTION - EYE HAZARD
Use safety glasses.
The piston assembly is spring loaded and will forcefully eject from the lever
body when the contact knob is removed.
Remove the piston assembly from the lever body.
Spray isopropyl alcohol on the lever body and the lever blade and
clean them with a shop towel.
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