Philips 212 Tone Arm issue

I inherited a Philips 212 Electronic record player which is in great shape and really clean (and had been in storage for quite a while). After using it for a few weeks, the pulley motor started dying. I got what I believe is an OEM used motor off ebay and installed it with some simple twist wire caps. That fixed the motor issue, but since then the tone arm will no longer track all the way to the end / interior of the record. Regardless of the anti-skate the tone arm stops about 80% of the way to the "middle" causing the record to continually skip at the point.

Not sure if this could be related to the motor, or if it's from repeatedly flipping the table upside down in the process of troubleshooting and replacing the motor. Any ideas?

Thanks