One thing my brother taught me (about bigger tractors) is to haul it outta gear, that way if something happens and moves, it won't accidentally start itself and drive itself off a trailer. Never thought about that. Not really an issue if you've got a hydrostat.
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Daniel G.
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(May 1970) 147 w/an IH spring assist, 48" deck, 42" blade, 1969 73, #2 trailer, 10" Brinly plow and (on loan) Dad's #2 tiller.