Hi,
I have done a test in my SharePoint 2013 and I can change primary site collection administrator.
Go to CA->Application Management->Change site collection administrators->choose the site collection, change the Primary site collection administrator.
Then Go to CA->Application Management->Configure quotas and locks->The new site collection administrator can select the site collection.
If I misunderstanding your issue, feel free to reply back.
Best Regards,
Lisa Chen
TechNet Community Support
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