zenith projection questions!

I recently inherited a zenith #ra46m84d OR  I read that #a50m84d is the same and I'm trying to clean and service the cooling liquid for the crts. I just bought the fluid on line and I was looking for a service manual to help me in the realigning of the system. The only ones I've found on pdf is the one that cost $. I've pulled the circuit board and crts out and just waiting on the fluids to come in. Anyone can help me with this?