When I am turning, my kubota zg222 makes a squeeking noise. It lasts for a second or two and is high pitched. It doesn't happen much when I am driving straight. I looked at the brake tension spring, and it appears to be about 1/4 of an inch off of what the manual says. I greased the casters and oiled a bunch of the joints. Also, could this be from being a new mower? Maybe some paint wearing off or things loosening up?