Maintenance 57
3.
Install the new piece of silicone rubber by pressing it into the recess of the silicone holder.
Ensure that the silicone rubber is fully and uniformly placed in the recess. It is also important
that the surface of the silicone rubber is smooth after it is in place, and that it shows no signs
of stress.
7.8 Replacing the Lid Gasket
The lid gasket ensures the vacuum chamber is fully closed during the machine cycle. This is
essential to reach the maximum vacuum level. Due to extreme pressure differences, the gasket
wears and should therefore be replaced regularly.
Replace the lid gasket if damaged or as specified in Maintenance Schedule on page 51.
Figure 22: Replacing the Lid Gasket
1.
Pull the old gasket loose to remove it.
2.
Cut a new piece of rubber.
Preferably cut the new piece of rubber slightly longer than the old piece.
The edges must be cut straight.
If the lid gasket is too short or too long, this may cause problems when closing the lid
or it may cause leakage.
3.
Install the new gasket by pressing it into the gasket slot. The lip of the gasket must face
downwards and outwards.
The gasket should be placed in the slot evenly and without any tension. The edges must be
placed closely together to prevent leakage.
7.9 Inspecting the Lid Springs
1.
Check the fastenings of the lid springs for wear, corrosion and damage.
2.
Check the lid springs for wear and damage.