HP9810A Printer

[aj04062]

So I finally got around to repairing the platen on my 9810A using the 3M cold shrink. After all of this, the motor doesn't have the power to rotate the mechanism. Rotating by hand seems hard, but can be done from the motor pulley.

When installed into the machine, and the paper advance switch is contacted, the motor makes a stuttering noise, but does not rotate.

Is there a motor issue here or should this mechanism rotate easier? I've taken it apart a couple times to make double check and I even have another unmolested (but gooey) unit to compare against.

Suggestions?