2004 Bombardier Outlander 330/400 Factory Service Manual, Page 123Get this manual
Section 03 ENGINE Subsection 08 (LUBRICATION SYSTEM)
R400motr127A R400motr128B
1Oil pump outer rotor surface 2Dial indicator
1Outer rotor 2Inner rotor
OUTER AND INNER ROTOR CLEARANCE mm (in) SERVICE LIMIT 0.25 mm (.009 in)
If clearance between inner and outer rotor exceeds the tolerance, replace oil pump shaft assemblyEnsure to also check oil pump housing and coverIf damaged, replace the complete oil pump assemblyIf clearance between outer rotor and its bore in oil pump exceeds the tolerance, replace the complete oil pump assemblyUsing dial indicator, measure side wear as shown
Difference between pump housing and outer rotor should not exceed 0.1 mm (.004 in)If so, replace replace the complete oil pump assemblyNOTE: When the axial clearance of the oil pump shaft assembly increases, the oil pressure decreasesCheck the inside of oil pump housing and its cover for scoring or other damagesIf so, change the complete oil pump assembly