CARTRIDGE SEAL INSTALLATION GENTLY SLIDE THE SEAL ASSEMBLY ONTO THE PUMP SHAFT UNTIL THE SHAFT/SLEEVE O-RING IS RESISTING APPLY EVEN PRESSURE TO THE END OF THE SEAL SLEEVE UNTIL THE SHAFT/SLEEVE O-RING SLIDES ONTO THE PUMP SHAFT ASSEMBLE THE REMAINING PUMP COMPONENTS TAKING CARE NOT TO IMPACT THE SEAL ASSEMBLY