2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 317Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 317

16Remove the nut and washer securing the oil pump drive gear to the crank balancer shaft; then remove the gear and account
is due to lubrication-related problem, replace the oil pump NOTE: For general servicing, it is advisable to disassemble,
clean, and inspect the oil pumpIf any wear or damage is suspected, replace the oil pump 20Remove the circlip securing the
oil pump driven gear; then remove the gearAccount for the pin and the washer18Release the tension from the gear shift cam