Hi all, I was wondering if anyone has any ideas as to the reason why, when I press the brake pedal on my tractor mainly during baling it makes a sound pretty much like the noise/squeak you would get when you stand on corrugated perspex. You still have brakes and if you release pedal and press again you may or may not hear it again. The noise seems to be around the area under cab at seat location back end. This evening I was baling and the noise started within 5 minutes so it was not that the oil was hot after a long day. lt's not a steel grinding noise. The tractor is new to me as it's the first McCormick we have bought so any help appreciated Thanks