4. LUBRICATION SYSTEM MXU 550EXi/MXU500i SERVICE INFORMATION GENERAL INSTRUCTIONS · The oil pump service may be done with the engine installed in the frame. · When removing and installing the oil pump use care not to allow dust or dirt to enter the engine. · If any portion of the oil pump is worn beyond the specified service limits, replace the oil pump as an assembly. · After the engine has been installed check that there are no oil leaks and that oil pressure is correct. SPECIFICATIONS Unit: mm ITEM STANDARD SERVICE LIMIT Engine oil At draining 3 liter capacity At disassembly 3.6 liter KYMCO 4-stroke oil or equivalent motor oil Recommended engine oil API service classification SJ Viscosity: SAE 5W-50 Tip clearance 0.15 max 0.2 Oil pump rotor Body clearance 0.15 0.2 0.25 Side clearance 0.04 0.09 0.12 TORQUE VALUES Oil pump screw 0.3 kgf-m (3 N-m ) Oil strainer screen cap 1.5 kgf-m (15 N-m) Apply oil to the threads and seating surface. Oil filter cartridge 1 kgf-m (10 N-m) Apply oil to the threads and seating surface. Oil pipe bolt 3.5 kgf-m (35 N-m) Apply oil to the threads and seating surface. Special tool: Oil seal & bearing drive A120E00014 4-2