Standard_Parts_Catalogue

Page 1581 | 3.5 Controlling, Venting, Sealing of Liquids and Gases 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 GN 651 Oil Level Indicators continued Assembly instruction Two M12 threaded bores are required to install the oil level indicator GN 651; for very thin walls and fastening with nuts, two bores of diameter 12.5 mm are required. For optimal sealing with O-rings, the screws should not be too tight (max. 12 Nm). Recommended roughness of the sealing surface Ra = 3 µm.