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STEP 5: REMOVE INTERNAL GLASS ELEMENT OR IOP FILTER AND IRIS SUB-ASSEMBLY
THE BELOW PROCEDURE APPLIES FOR ALL OPTIMO PRIME SERIES
1 - Put in position the internal part of the IOP element spanner 66067121AA and rotate it anti-clockwise so it falls in the correct thread position.
2 - Tighten the internal part of the spanner up to the end-stop. Do not apply more torque after you reached the end-stop.
3 - Put in position the external part of the IOP element spanner and rotate it left or right so the two pins fit perfectly with the retainer holes.
4 - Untighten the internal glass barrel retainer.
5 - Pull out straightly by the internal part of the IOP element spanner. The internal glass barrel and the retainer will come out with the spanner.
6 - Untighten and remove the internal glass barrel from the internal part of the IOP element spanner.
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