KAYO MOTOR A180, Service Manual, Page: 9 / 213

1 Maintenance information
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surface before assembling.
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When disassembling, check the necessary places and measure relevant data so that it can be
restored to the state before disassembly.
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Fasteners such as bolts, nuts and screws should be pre-tightened first and then tightened on the
diagonal with the specified tightening torque according to the principle of from large to small and from
inside to outside.
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During disassembly, rubber parts should be checked for aging during disassembly and replaced in
advance if necessary. In addition, since rubber parts are not resistant to gasoline, kerosene, etc., please
try not to let volatile oils and greases adhere to them.
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Smear or inject the recommended grease in the specific places according to the requirements of the
SERVICE MANUAL.
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The correct special tools should be used for disassembly and assembly operations.
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The inner ring or outer ring of the ball bearing can be rotated by fingers to confirm whether the
rotation is flexible and smooth. If the disassembly method of applying force on the ball is adopted
during disassembly, the dismantled bearing should not be used again:

If the bearing axial or radial clearance is too large, replace it.

The bearings that feel stuck in rotation should be cleaned, and those that still feel stuck after
cleaning should be replaced, and those that cannot be cleaned should be replaced directly.

If the bearing is originally compaction fit with vehicle or axle diameter, but it gets unsuitable
after disassembly, replace it.
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The bearings should be coated with oil or grease before assembly.Pay attention to the
installation direction when assembling single-sided dust-proof bearings.Open type or double-sided
dust-proof bearings should be installed with the manufacturer's logo and size outward when
assembling.
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When installing the rectangular retaining ring, the chamfered side should face the direction of
force. Do not use the retaining ring that has been slackened and lost its elasticity. After assembling,
turn the rectangular retaining ring to confirm that it is firmly installed in the groove.
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After assembly, it is necessary to check whether each fastening part is tightened and whether it
is working properly.
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Brake fluid and coolant will damage the painted surface, plastic parts, rubber parts, etc., do not
allow them to adhere to such parts, in case of adhesion, immediately rinse with water.
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The oil seal should be installed with the side marked by the manufacturer facing outward (the
direction without oil):

When assembling, be careful not to curl the oil seal lip and prevent burrs from scratching the oil
seal lip.