Waters Xevo TQD Operator's, Overview And Maintenance Manual page 180

To fit the new oil demister element:
1. Fit the spring to the new oil demister element.
2. Holding the oil demister element slightly elevated to prevent the loss of
the spring, fit the exhaust flange to the oil demister element.
4-104 Maintenance Procedures
The pump oil can be irritant, or contaminated with
Warning:
biohazardous or toxic analyte accumulated during normal
operation. Always wear chemical-resistant, powder-free gloves
when replacing the oil demister element.
TP02682