1999-2002 TRX400EX Fourtrax Service Manual, Page 57Get this manual
LUBRICATION SYSTEM
OIL PUMPSTRAINER
REMOVAL
Removethe right crankcase cover (page9-2)Removethe clutch outer (page9-5)Remove the three mounting bolts andthe oil pump
Removethe gasket and two dowel pins
RELIEF VALVE CHECK
Remove the following:cotter pinstopper plate -spring -valve