Kymco XCITING 500 - Service Manual > Service information

LUBRICATION SYSTEM DIAGRAM

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.
• For oil pressure indicator inspection, refer to section 20 of this manual.

SPECIFICATIONS

Unit: mm (in)

TORQUE VALUES

Oil pump screw
  3 N*m (0.3kgf*m, 2 lbf*ft)
Oil cooler bolt
  35 N*m (3.5 kgf*m, 25 lbf*ft)
Oil pressure switch
  22 N*m (2.2 kgf*m, 16 lbf*ft)
  Apply sealant to threads.
Oil strainer screen cap
  15 N*m (1.5 kgf*m, 11 lbf*ft)
  Apply oil to the threads and seating surface.
Oil filter cartridge
  10 N*m (1 kgf*m, 7 lbf*ft)
  Apply oil to the threads and seating surface.

TOOLS

Oil filter wrench E052

TROUBLESHOOTING

Oil level low

• Oil consumption
• External oil leak
• Worn piston ring
• Incorrect piston ring installation
• Worn valve guide or seal

Oil contamination (White appearance)

• From coolant mixing with oil
  • Faulty water pump mechanical seal
  • Faulty head gasket
  • Water leak in crankcase

No oil pressure

• Oil level too low
• Oil pump drive chain broken
• Oil pump drive sprocket broken
• Oil pump damaged (pump shaft)
• Internal oil leak

Low oil pressure

• Pressure relief valve stuck open
• Clogged oil filter and strainer screen
• Oil pump worn or damaged
• Internal oil leak
• Incorrect oil being used
• Oil level too low

High oil pressure

• Pressure relief valve stuck closed
• Plugged oil filter, gallery, or metering orifice
• Faulty oil pump

Seized engine

• No or low oil pressure
• Clogged oil orifice/passage
• Internal oil leak
• Non-recommended oil used

Oil contamination

• Deteriorated oil
• Faulty oil filter
• Worn piston ring (White appearance with water or moisture)
  • Damaged water pump mechanical seal
  • Damaged head gasket
  • Oil relief not frequent enough

Oil pressure warning indicator does not work

• Faulty oil pressure switch
• Short circuit in the indicator wire
• Low or no oil pressure

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