In cooler climates when used with a snowblower I don't believe the cooling fan is neccessary. I would however get it replaced before the weather warms up too much this spring.
Your going to have to slide the engine ahead to get the shaft out. Or your going to have to drive the roll pins out of the yokes. I was told you need to support the drive shaft on the Hydro end while doing this so as to not damage the bearings in the pump. While your in that far, it would be a good idea to replace the coupling disc if they are the original ones.
Good luck,
Chris
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