If it is the front pto we are talking about on a NF, then I would remove the hood, disconnect the + batterycable, remove the VR [ just the 2 mount bolts and rest on motor] and the wire harness hold. Take off the front cast iron front grill and get in there and work. 
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IH CUB CADET 1450, 72, 86, 1211, IH #2 CART, IH 56" SNOW BLADE, COLLECTING CUB CADET ENGINES
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