2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 355Get this manual
3Place the oil pump into position in the crankcase and secure with the three Phillips-head screws coated with blue Loctite #243Tighten to kg-m (7 ft-Ib) 6Attach the spring to the gear shift cam stopper arm
4Place the pin and washer into position on the oil pump shaft, install the oil pump driven gear, and secure with the circlip