Pump wetend is held in place by 4 long bolts. Loose old pump or nuts to install new wetend but NEVER remove the bolds. They hold the motor components together.
Remove four nuts on new motor but do NOT remove the bolts.
Install 1/2 of new mechanical seal into body of new wetend. In this example the 1/2 seal section with the rubber boot is pressed into wetend boot. This is the most common style among Jacuzzi pumps. BUT, on some model wetends the seals are installed the opposite and often require silicon to seal the spring half into this boot.
Note: The rubber seal is inserted into the boot of the wetend and the white ceremic ring is exposed to the other half of the seal.