MXU250 cap04 (lubrificazione) .pdf
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4. LUBRICATION SYSTEM
MXU 250
4
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4
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LUBRICATION SYSTEM
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SERVICE INFORMATION-----------------------------------------------TROUBLESHOOTING----------------------------------------------------ENGINE OIL/OIL FILTER -----------------------------------------------OIL PUMP --------------------------------------------------------------------
4- 2
4- 2
4- 3
4- 3
4-0
4. LUBRICATION SYSTEM
MXU 250
LUBRICATION SYSTEM
Rocker Arm Shaft
Crankshaft
Oil Filter Screen
4-1
Oil Pump
4. LUBRICATION SYSTEM
MXU 250
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
Unit: mm (in)
Item
Inner rotor-to-outer rotor clearance
Standard
0.15 (0.006)
Oil pump Outer rotor-to-pump body clearance 0.15~0.2 (0.006~0.008)
Rotor end-to-pump body clearance
Service Limit
0.2 (0.008)
0.25 (0.01)
0.04~0.09 (0.0016~0.0036) 0.12 (0.0048)
TROUBLESHOOTING
Oil level too low
• Natural oil consumption
• Oil leaks
• Worn or poorly installed piston rings
• Worn valve guide or seal
Poor lubrication pressure
• Oil level too low
• Clogged oil filter or oil passages
• Not use the specified oil
4-2
4. LUBRICATION SYSTEM
MXU 250
ENGINE OIL/OIL FILTER
OIL LEVEL AND OIL CHANGE
Refer to the “ENGINE OIL” section in the
chapter 3 to check the oil level and
replacement and oil filter cleaning.
OIL PUMP
REMOVAL
Remove the right crankcase cover and the
A.C. generator flywheel. (Refer to the “A.C.
GENERATOR/FLYWHEEL” section in the
chapter 16)
Remove the starter clutch gear. (Refer to the
“STARTER CLUTCH” section in the
chapter 18)
Bolts
Remove the two bolts and oil separator
cover.
Oil Separator Cover
Pry off and remove the circlip from oil
driven sprocket.
Circlip
4-3
4. LUBRICATION SYSTEM
Remove the oil pump drive chain and oil
driven sprocket.
MXU 250
Oil Pump Driven Sprocket
Oil Pump Drive Chain
Remove the two oil pump bolts for remove
the oil pump.
Oil Pump Bolts
Screw
OIL PUMP DISASSEMBLY
Remove the screw and disassemble the oil
pump.
Pump Body
INSPECTION
Measure the rotor end-to-pump body
clearance.
Service Limit: 0.12 mm (0.0048 in)
4-4
4. LUBRICATION SYSTEM
MXU 250
Inner Rotor
Measure the inner rotor-to-outer rotor
clearance.
Service Limit: 0.2 mm (0.008 in)
Outer Rotor
Measure the pump body-to-outer rotor
clearance.
Service Limit: 0.25 mm (0.01 in)
Outer Rotor
Pump Body
ASSEMBLY
Install the outer rotor, inner rotor and pump
shaft into the pump body.
Pump Cover
Outer Rotor
* Insert the pump shaft by aligning the flat
on the shaft with the flat in the inner
rotor.
Install the dowel pin.
Install the pump cover by aligning the hole
in the cover with the dowel pin.
Tighten the screw to secure the pump cover.
Inner Rotor
INSTALLATION
Reverse the “OIL PUMP REMOVAL”
procedures.
* Install the oil pump with the arrow on
the pump body facing up and fill the oil
pump with engine oil before installation.
Oil Pump Bolts
4-5
Dowel Pin
4. LUBRICATION SYSTEM
Make sure that the pump shaft rotates freely
without binding.
MXU 250
Pump Shaft
Install oil pump driven sprocket and drive
chain, circlip and oil separator cover.
4-6
Sur le même sujet..
filter
install
cover
engine
lubrication
system
clearance
inner
limit
shaft
outer
rotor
remove
service
bolts