Wedge
Page 5
November 2011
Maintenance
Ampco Pumps Company
Seal Assembly
7)
Thread the nut onto the shaft and tightening it down using the appropriate wrench and a
non-metallic wedge to hold the rotor in place (Figure 10). Torque the rotor nuts down using
163 N-m (ZP3 30, See ZP2 manual for correct values) of force. Orientate the rotors as seen in
Figure 10 and
Always
tighten the first rotor positioned under the overlap of the opposing rotor.
Repeat with the second rotor in the same orientation.
8)
Install a new cover o-ring and slide the cover over the studs making sure that the dowels in
the body are aligned with the correct dowel holes in the cover (Figure 11). Visually inspect to
ensure that the cover o-ring remained in place. Turn the cover nuts (clockwise) by hand and
fully tighten them using the appropriate wrench. Tighten the rotor nuts in an opposing manner,
as seen on Figure 11, so that the cover is evenly tightened to the body.
Figure 10: Rotor Assembly
Figure 11: Cover Assembly
Overlap
