I would recommend either lubricating or changing the bearings. The motor is a split-phase capacitor-run induction motor: Tek used several suppliers. Nominal voltage 115v but not too critical. A previous post on here gave the bearing details which I've reproduced below (valid for 453/454/454A)
John
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R3ZZ is the NSK number for the bearing under discussion.
Cross references are:
Single shielded
NSK = R3ZZ
NTN = RA3ZZ
Fafnir = 33KDD5
SKF = WY3/16ZZ
KOYO = EE1SZZX
MRC = R3FFM
Dayton = 1ZGC1
Double shielded
NTN = RA3LL/1E
Dayton = 1ZDG1
Dimensions:
Bore = 0.1875"
O. D. = 0.500"
Depth = 0.1960"
John Sykes