on our 1460 the screen spins fast,and we dont clean it but once a year. I had daily trouble with my 915.but I did notice the fins on the 14 are a lot more open and further apart letting the dust go through instead of plugging. maybe someone replaced the core with to close together fins.my 915 had closer fins and had to be cleaned sometimes twice a day.the 1460 will cut 2000,2500 acres easily without having to be cleaned and runs plenty cool.