The fan should spin free.

The normal bearing problem is that the shaft seizes to the bushing. at that point the bushing spins in the housing. That is not a bearing and lubrication won't help for long. You must be sure that the shaft spins in the bushing not the bushing in the housing.

I can't tell you whether the controller goes that high, it doesn't on the later systems. but it might on yours.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician