Phillips Magnavox PTV

I have a 50" philips Magnavox 9P5034C103, chassis PTV835 and want to do a Service on the CRT's

Like changing the coolant and making all the adjustments that come after.

I have been researching this and need some help, Hopefully Larry is watching "LOL" and would be willing to guide me through the process, I am Begging Now! I feel convident in doing this just need instructions. I am a Retired Computer Tech and a disabled Vet so I need to keep the cost down by doing it myself. Ok now the picture is hazy around light images, and the convergence all seem to be working but it's like out of focus and every thing I read on the subject points to the CRT Coolants being contaminated or just Old. Does this sound right?

Waiting Patiently to hear from Larry "LOL"