Wiper 300SE

I have a 300 SE (3.2 Litre petrol)1993 Right hand drive The right hand drivers wiper arm appears to go too low and thuds against the plasic housing below when operated.
Is there any adjustment to limit the stroke of the arm movement ? Many Thanks
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It needs to be readjusted... by opening the cover off the privot... loosen the nut... use a puller to take it out. DO NOT TRY TO PRY LOOSE AGAINST WINDSHIELD otherwise... craaaack. Set to proper height and tighten back down.
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