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Overview
This is a real hands-on maintenance day on a personally-owned 7520, not a sales pitch: the owner drains and refills engine oil (22 quarts), swaps the oil filter, checks the air filter, pulls diagnostic trouble codes from an intermittent clutch/transmission speed sensor fault, and calls the John Deere dealer to diagnose it. It also touches a deteriorating fuel hose and its cost-per-inch replacement. Good for owners chasing similar error codes or curious about routine 7520 upkeep, not a buying-decision video.
Posted by Border View Farms, an owner-operator documenting routine repairs and diagnostics on their own tractor, with some unrelated personal asides mixed in.