Zontes ZT310M 2022, Руководство по обслуживанию

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Three, Common fault phenomena/troubleshooting
1. The engine oil level is too low.
• Engine oil is leaking.
• The piston ring is worn or improperly installed.
• Cylinder wear.
• The seals such as valve guide and valve stem diameter oil seal are worn out.
2. The engine oil is dirty.
• The oil is not changed regularly.
• The gasoline is of poor quality.
• The piston ring is worn.
• Oil is oxidized.
Four, oil pump
Disassemble
Before disassembling the oil pump, perform the following operations:
• Remove the muffler.
(Refer to ZT310T-M Maintenance Manual-2. Maintenance-Bolts and Nuts of Muffler for dis
assembly and assembly)
• Remove the right crankcase cover of the engine. (Refer to ZT310T-M engine maintenance manual for dis
assembly and assembly-Right crankcase cover, magneto-Right crankcase cover, magneto stator)
• Remove the magneto rotor. (Refer to ZT310T-M engine maintenance manual for disassembly and assembly-
Right crankcase cover, magneto-Magneto rotor)
•Remove the 5×5.7×16 half-circle key and electric start gear.
(Refer to ZT310T-M Engine Maintenance Manual-
Magneto Rotor for disassembly and assembly)
①
Use 8#-T type socket wrench to remove 2 oil pump locking bolts (Rotate counterclockwise).
②
Take out the 2 oil pump bolts, and take out the oil pump assembly and the oil pump chain together.