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Read articles →This is a diagnostic follow-up on a coolant reservoir cap that's been leaking on a 2013 MF 5610, not a repair or fix. The owner closely examines the cap and reservoir threads, demonstrates cross-threading with calipers, and compares the cap design against a John Deere 6415 for contrast, concluding it's likely a design flaw he plans to report to the dealer. Useful for 5610 owners troubleshooting the same leak, not general buyers.
Posted by an owner working through a mechanical problem on his own tractor in real time, with no resolution confirmed yet.
The reservoir has flat unthreaded spots on the front and back, and the cap has matching thread gaps, causing it to cross-thread and not seal level when tightened.
The owner believes so, since gap threads cause cross-threading. He compared it to a John Deere 6415, which has threads all the way around and no gaps.
No, the owner tried it and the Deere cap will go over the reservoir but still cross-threads and sits too low, so it does not work as a fix.
