I have a Jandy SHPM 1.5 Ser: R09FE0523. I would like to replace the inard seals, as I’m having any issue building pressure. When I shut down my pump and open it up to clean everything, I’m having an issue when I restart the pump. It doesn’t suck enough to get the pump working properly. If I pull the lid back off and put the hose in to fill it up, it primes it enough; however, I need to replace the seals so I get a better suction.