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Step 6Test the fit of the piston and O-Ring
While it should not be difficult to insert the piston and O-Ring into the nipple there should be obvious resistance from air pressure and the piston should spring back when released. If not try a little more lubricant.
If the piston can not be inserted then remove all lubricant from the shaft and O-Ring, slide the O_Ring up onto the shaft past the seat, put the piston back in the drill and spin the O-Ring on some sandpaper to reduce the outside diameter of the O-Ring a very small amount each time.
Re-lubricate and re-seat the O-Ring and try again. Repeat this process if necessary.
If the piston can not be inserted then remove all lubricant from the shaft and O-Ring, slide the O_Ring up onto the shaft past the seat, put the piston back in the drill and spin the O-Ring on some sandpaper to reduce the outside diameter of the O-Ring a very small amount each time.
Re-lubricate and re-seat the O-Ring and try again. Repeat this process if necessary.
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