Projection CRT Coolant Leak

Got this massive RCA projection set (CTC-195 chassis) in the other day, the initial symptoms were a badly-shrunken raster and an inability to change the channels or adjust volume. Once I got inside I noticed some strange corrosion in a couple of places, and realized that some coolant had leaked out of the blue CRT and dripped onto the board. The spill wasn't too bad, and after cleaning up the board the set appears to work. The problem is that the blue CRT has lost at least some of its coolant, and there's a risk that more may leak out in the future. The leak seems to be around the edge of the CRT, like it just wasn't sealed properly. There are two things I now need to know:

How to add coolant, and what amount to add. These CRT's have an odd rubber button on the side, it looks like the primer bulb on a lawn mower engine - I'm guessing these are involved in the procedure.
How to seal the leak - is common silicone sealant good enough? Thanks for any advice.

nge

hat

the

Long procedure if you are not familiar. The crt has to be removed from the chassis to determine if any coolant leaked onto the HV anode lead and caused subsequent arcing. If not, crt has to be disassembled and and drained and cleaned, lens crt face, etc. Generally, it will be close to a bottle of new coolant to refill. Once it is reassembled, coolant is added through the "Primer Bulb" refill hole, making sure not to allow air bubbles to be introduced. Auto type sealant is adequate, allow 12-24 hours to dry and make sure no leaks before re- inserting crt into chassis. At that point you will have to enter the service mode and re-converge blue crt to the other 2 crt's. Good Luck.