4. LUBRICATION SYSTEM
4-2
PEOPLE S 4T
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• The maintenance of lubrication system can be performed with the engine installed in the frame.
• Use care when removing and installing the oil pump not to allow dust and foreign matters to enter
the engine and oil line.
• Do not attempt to disassemble the oil pump. The oil pump must be replaced as a set when it
reaches its service limit.
• After the oil pump is installed, check each part for oil leaks.
SPECIFICATIONS
Item Standard (mm) Service Limit (mm)
Inner rotor-to-outer rotor clearance ⎯ 0.12
Oil pump Outer rotor-to-pump body clearance ⎯ 0.12
Rotor end-to-pump body clearance 0.05～0.10 0.2
TROUBLESHOOTING
Oil level too low Poor lubrication pressure
• Natural oil consumption • Oil level too low
• Oil leaks • Clogged oil filter or oil passages
• Worn or poorly installed piston rings • Not use the specified oil
• Worn valve guide or seal
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