Kymco MO BW125, MO BW 150 Service Manual - chap 04 (lubrificazione)
4. LUBRICATION SYSTEM
4-0
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4
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LUBRICATION SYSTEM
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LUBRICATION SYSTEM DIAGRAM-------------------------------- 4-1
SERVICE INFORMATION -------------------------------------------- 4-2
TROUBLESHOOTING ------------------------------------------------- 4-2
ENGINE OIL/OIL FILTER -------------------------------------------- 4-3
OIL PUMP REMOVAL------------------------------------------------- 4-4
OIL PUMP DISASSEMBLY ------------------------------------------- 4-4
OIL PUMP INSPECTION ---------------------------------------------- 4-5
OIL PUMP ASSEMBLY------------------------------------------------ 4-6
OIL PUMP INSTALLATION------------------------------------------ 4-6
4
4. LUBRICATION SYSTEM
4-1
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LUBRICATION SYSTEM
Oil Pump
Oil Filter Screen
Crankshaft
Rocker Arm Shaft
4. LUBRICATION SYSTEM
4-2
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SERVICE INFORMATION
GENERAL INSTRUCTIONS
• The maintenance of lubrication system can be performed with the engine installed in the frame.
• Drain the coolant before starting any operations.
• 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
OIL PUMP
Standard (mm)
Service Limit (mm)
Inner rotor-to-outer rotor clearance
0.15
0.20
Outer rotor-to-pump body clearance
0.15_ 0.20
0.25
Rotor end-to-pump body clearance
0.04_ 0.09
0.12
ENGINE OIL
Engine Oil Capacity
At disassembly: 1.1 liter At change: 0.9 liter
Recommended Oil
SAE15W40# API: SG/CD
TROUBLESHOOTING
Oil level too low Poor lubrication pressure
• Natural oil consumption • Oil level too low
• Oil leaks • Clogged oil filter or oil passage
• Worn piston rings • Faulty oil pump
• Worn valve guide
• Worn valve guide seal
Oil contamination
• Oil not changed often enough
• Faulty cylinder head gasket
• Loose cylinder head bolts
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