Page 208 - 2019 SHOP MANUAL CRF1000/A/D

du
dummyheadmmyhead

LUBRICATION SYSTEM
SERVICE INFORMATION
LUBRICATION SYSTEM
GENERAL

Used engine oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods. Although this is unlikely
unless you handle used oil on a daily basis, it is still advisable to thoroughly wash your hands with soap and water as soon as
possible after handling used oil.
• This section covers service of the oil pump and oil strainer.
• The oil pump and oil strainer can be serviced with the engine installed in the frame.
• The service procedures in this section must be performed with the engine oil drained.
• 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 oil pump has been installed, check that there are no oil leaks and that oil pressure is correct.

TROUBLESHOOTING

Oil level too low
• Oil consumption
• External oil leak
• Worn piston rings
• Improperly installed piston rings
• Worn cylinders
• Worn valve stem seals
• Worn valve guide
Low oil pressure
• Oil level low
• Clogged oil strainer
• Faulty oil pump
• Internal oil leak
• Incorrect oil being used
• Oil pressure relief valve stuck open
No oil pressure
• Oil level too low
• Oil pressure relief valve stuck open
• Damaged oil pump
• Internal oil leak
High oil pressure
• Oil pressure relief valve stuck closed
• Clogged oil filter, oil gallery, or metering orifice
• Incorrect oil being used
Oil contamination
• Oil or filter not changed often enough
• Worn piston rings
Oil emulsification
• Blown cylinder head gasket
• Leaky coolant passage
• Entry of water

9-2