74
Figure 71: Vacuum Pump with Pump Head Unit Removed
4.
Rotate the counter-weight located within the side compartment by hand until the connecting
rod moves the diaphragm into its highest position. At this point you may be able to see if the
existing diaphragm is worn or damaged. See Figure 80.
Figure 72: Damaged Diaphragm in Highest Position
5.
Lift and grip the edges on opposite sides of the diaphragm with your fingers and turn counter-
clockwise to unscrew it from the connecting rod. Ensure to remove and retain the diaphragm
spacers which will be located on the threaded portion of the diaphragm. See Figure 81.
