Standard_Parts_Catalogue

Page 1577 | 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 654 / GN 654.1 Oil Level Indicators continued Assembly instructions The assembly of the oil level indicators GN 650 is very simple and econo- mical. You need two drillings Ø 10,5 and/or Ø 12,5 mm in the distance l 1 in te containerv wall. The oil level indicator can also be installed directly i.e. without nut, if the container wall has a fitting thread. All individual parts necessary for the assembly are provided: Hexagon nuts, O-rings and serrated lock washers for safe guard. For perfect sealing by the O-rings the screws should not be too strongly tightened (max. 12 Nm). Recommended roughness of the sealing surface RA = 3 μm.