Replacing The O-Ring - W&H proxeo TWIST PL-40 H Instructions For Use Manual

9. Replacing the O-ring

Do not use sharp tools!
 Pull the handpiece sleeve off the handpiece drive.
 Squeeze the O-ring between your thumb and index finger firmly so that it forms a loop.
 Pull the old O-ring off.
 Push the new O-ring on in its place.
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