2003 Bombardier Outlander 400 Factory Service Manual, Page 115Get this manual
Section 03 ENGINE Subsection 08 (LUBRICATION SYSTEM)
R400motr125A
R400motr127A
1Oil pump shaft assembly 2Oil pump housing
Inspection
Inspect oil pump shaft assembly, housing and cover for marks or other damagesReplace O-ring no27 if brittle or hardThis O-ring is located on the oil pump housingCheck inner rotor for corrosion pin-holes or other damagesIf so, replace oil pump shaft assemblyEnsure to also check oil pump housing and coverIf damaged, replace the complete oil pump assembly
1Outer rotor 2Inner rotor
OUTER AND INNER ROTOR CLEARANCE mm (in) SERVICE LIMIT 0.25 mm (.009 in)