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| Slide arms of the extractor -T20177- under wiper arm, as shown in the illustration. |
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| Rotate tightening bolt of the extractor -T20177-clockwise until it makes contact with wiper arm shaft. The previously slackened hexagonal nut serves to centre and guide the tightening bolt. |
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| Rotate the tightening bolt of the extractor -T20177- with a 6 mm hexagonal wrench clockwise until the point where the wiper arm detaches from the shaft. |
Installation is carried out in reverse order, noting the following: |
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