Remove the actuator by unscrewing the yoke
drive nut (key 9) and lifting off the complete actuator
assembly. Hold the flattened portions of the bonnet
yoke (key 2) in a vise and unscrew the valve bonnet
(key 8) using a 21/4 inch wrench. Remove and
inspect the bearing cartridge assembly (key 4) and
Oring (key 49).