2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 116Get this manual
1D-40 Engine Mechanical: Gearshift System 1) Remove the gearshift cam plate guide (1)Oil Filter Remove the oil filter with the special toolSpecial tool (A): 0991540610 (Oil filter wrench)(A)
I827H1140132-01
2) Remove the gearshift shaft (2) and gearshift cam plate (3)
I827H1140135-01
Oil Pump 1) Remove the oil pump drive gear bolt with holding the oil pump driven gear (1) using the special tool2) Remove the washer (2) and oil pump drive gear (3)2