Kymco MO X500 Service Manual - chap 04 (lubrificazione)

4. LUBRICATION SYSTEM

XCITING 500

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LUBRICATION SYSTEM

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LUBRICATION SYSTEM DIAGRAM ---------------------------------- 4-1

SERVICE INFORMATION------------------------------------------------ 4-2

TROUBLESHOOTING----------------------------------------------------- 4-3

OIL PRESSURE SWITCH ------------------------------------------------- 4-4

OIL PRESSURE RELIEF VALVE---------------------------------------- 4-4

OIL PUMP -------------------------------------------------------------------- 4-5

OIL COOLER --------------------------------------------------------------- 4-10

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4. LUBRICATION SYSTEM

LUBRICATION SYSTEM DIAGRAM

XCITING 500

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4. LUBRICATION SYSTEM

XCITING 500

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)

ITEM STANDARD SERVICE LIMIT

Engine oil
capacity

Recommended engine oil KYMCO 4-stroke oil or

Oil pump rotor

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)

Oil filter cartridge 10 N•m (1 kgf•m, 7 lbf•ft)

At draining 2.0 liter (2.1 US qt, 1.8 lmp qt) ⎯

At disassembly 2.5 liter (2.7 US qt, 2.2 lmp qt) ⎯

At oil filter change 2.1 liter (2.2 US qt, 1.9 lmp qt) ⎯

equivalent motor oil

API service classification SJ

Viscosity: SAE 5W-50

Tip clearance 0.15 (0.006) max 0.2 (0.008)

Body clearance 0.15 – 0.2 (0.006 – 0.008) 0.25 (0.01)

Side clearance 0.04 – 0.09 (0.0016 – 0.0036) 0.12 (0.0048)

Apply oil to the threads and seating surface.

Apply oil to the threads and seating surface.

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TOOLS

Oil filter wrench E052

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4. LUBRICATION SYSTEM

XCITING 500

TROUBLESHOOTING

Oil level low High oil pressure

• Oil consumption • Pressure relief valve stuck closed

• External oil leak • Plugged oil filter, gallery, or metering orifice

• Worn piston ring • Faulty oil pump

• Incorrect piston ring installation

• Worn valve guide or seal Seized engine

• No or low oil pressure

Oil contamination (White appearance) • Clogged oil orifice/passage

• From coolant mixing with oil • Internal oil leak

─ Faulty water pump mechanical seal • Non-recommended oil used
─ Faulty head gasket

─ Water leak in crankcase Oil contamination

• Deteriorated oil

No oil pressure • Faulty oil filter

• Oil level too low • Worn piston ring (White appearance with water or

• Oil pump drive chain broken moisture)

• Oil pump drive sprocket broken ─ Damaged water pump mechanical seal

• Oil pump damaged (pump shaft) ─ Damaged head gasket

• Internal oil leak ─ Oil relief not frequent enough

Low oil pressure Oil pressure warning indicator does not work

• Pressure relief valve stuck open • Faulty oil pressure switch

• Clogged oil filter and strainer screen • Short circuit in the indicator wire

• Oil pump worn or damaged • Low or no oil pressure

• Internal oil leak

• Incorrect oil being used

• Oil level too low

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