MAINTENANCE 29Page 29 of 43 SERVICE MANUAL FC5718/R © OHAUS CorporationPush it between sealing and rotor chamber. Pull the sealing in a circular movement towardsthe chamber’s centre.3.4 Replacing the lid gasket• Remove the lower covering of the front housing and remove the screws of thehousing as described earlier.• Open the lid as wide as possible.• Pull the housing slightly upwards until the lid gasket is freely accessible.• Now remove the old lid gasket. ATTENTION: The lid gasket is glued at some pointsin case you want to re-use the same gasket you have to loosen the glued pointscarefully to avoid any damage.• Re-assemble the unit in reverse order.• Take care that the fixing ends are at the back part of the chamber. Start themounting always with this glued ends. You can use a small Allan key. Push itbetween sealing and rotor chamber. Pull the sealing in a circular movement towardsthe chamber’s centre (see chapter 7.4.5.).Make sure that the cut-out of the chamber sealing to the airflow is not covered.3.5 Removing the lidOpen the lid as wide as possible.Hold the lid with one hand and remove the fixing screws of the hinges.The lid can now be removed completely.fixing screws