A
The A-side is the opposite side of where you'll find 3B.
- Pry open the rubber cover.
- Unscrew the nut with a 8 mm wrench.
- Remove the metal lid.
- Bend off the metal collar.
- Pry open the rubber membrane.
- Remove the metal lid.
- Remove the spring.
- Take off the locking.
- Remove the plastic disc
You recognize the A-side by the square around the small hole (A).
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Opening a height corrector
It's a good idea to put all the small parts in sequence in such a box, then they are not in disarray if you bump into them.
Clean thoroughly with paper towels. Blow through the small holes on either side with compressed air.
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B
- Pry open the rubber cover.
- Unscrew the nut with a 8 mm
wrench while holding 3B with a 10 mm wrench.
If the nut is hard to open, set the 10 mm wrench in a vise.
- Remove 3B.
- Remove the washer.
- Remove the metal lid.
- Bend off the metal collar.
- Pry open the rubber membrane.
- Remove the metal lid.
- Remove the spring.
- Pull out 10B.
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