Waters Autospec Premier Operator's Manual page 219

To remove the source heaters
To avoid damage, handle the source heaters with great care;
Caution:
they are very fragile.
1. Remove the screw, washer, and 2-mm ceramic spacer, securing the first
lead (with small insulating ceramic) of one of the source heaters to the
ion block insulated heater terminal.
Insulating ceramic
Insulated heater terminal
2. Remove the heater lead, terminal, and shaped spacer from the ion block.
3. Remove the screw and washer securing the second source heater lead to
the ion block.
4. Slide the source heater out of the ion block.
Accelerating voltage lead
Source heater
Source maintenance 7-61