"JJR2" wrote in message

It has a shaft about 5/8" in diameter, plain bushings (I can't tell
whether they were supposed to be Oilite), and thrust washers assembled
from an assortment of washers. The bearing assemblies are shrouded in
pressed steel cups about 1 1/2" in diameter. The assemblies are clean and
dry, and show no sign of ever having any form of grease on them anywhere.
Can these be relubricated? Should they be packed to insure a supply of
lubricant?

Unless they are sealed, the lube may leak and cause other problems. OTOH,
so what as it is trash if you don't do something I'd put a bit of good
grease and give it a try, but I'd probably not pack them

Considering the price, don't expect to much in the way of quality bearings.
A good set will come close to the cost of the entire fan.