My Delta faucet which is probably 30 years old constantly drips. I have replaced the shower head so know it is the faucet. It is a single handle push up for on and twist to the right or left for temperature control. How do I replace the o rings and gaskets?

Thank you

How do I replace the o rings and gaskets?
You replace the springs and seats. I'll put up a image of a older Delta faucet to help. Good luck. Tom