Maintaining the MMI 8
Maintaining Your GC 137
To Change the Septum on the MMI
1 Gather the following:
• Replacement septum. (See “Consumables and Parts for
the MMI” on page 128.)
• Wrench, hex for changing septum
• 0- or 00- grade steel wool (optional)
• Tweezers
2 Load the inlet maintenance method and wait for the GC
to become ready.
3 Remove the septum retainer nut or Merlin cap.
4 Use tweezers to remove the septum or Merlin Microseal
from the insert assembly. Do not gouge or scratch the
interior of the insert assembly.
5 Firmly press the new septum or Merlin Microseal into the
fitting. The metal parts side of the Merlin Microseal
should face down (toward the oven).
6 Install the septum retainer nut or Merlin cap and
finger- tighten. Tighten the septum retainer nut until the
C- ring is about 1 mm above the nut.
Be careful! The oven and/or inlet may be hot enough to cause
burns. If the inlet is hot, wear heat-resistant gloves to protect your
hands.
Septum retainer nut
Septum
Insert assembly
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