I have a 2014 M6040. It has about 1400 hours on it. I have owned it since new. I have been doing quite a bit of work with the loader moving dirt and gravel and while operating it recently, noticed that the clutch was suddenly much easier to press down. Almost spongy, though is returns to normal as I lift my foot back up and it engages. For the life of the tractor I have always felt normal resistance while disengaging the clutch, but while operating I noticed it became much easier to disengage. The hydraulics all function normal. The shuttle shift works as it should. The pto operates as normal. Any ideas on why suddenly this would be happening?