Question about replacing the surround foam

12" driver,
that I cant push it down only move it up,
do you suggest to replace it surround foam
The only issue that I not like to do is remove the dome/cap or try to balance it on gluing.
q7Dnta7.jpg
 
The problem with the cone excursion is understood.

It is more likely to be a rear suspension fault than a front suspension fault.

Inspect the rear suspension. Is the corrugated spider still attached to the voice coil former as shown in the attachment?
 

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