niu N-GT, Service Manual

Page: 47 / 144

V1.0.0 47
Failure diagnosis
Oscillation of the rear wheel
Deformation of the motor rim
Motor failure
Motor un-tightened
Bearing loosened or worn
Insufficient tyre pressure
Shock absorber softened excessively
Insufficient spring elasticity
Oil leakage from shock absorber
No elasticity of the rear shock absorber spring
Extremely low tyre pressure
Shock absorber hardened excessively
Shock absorber rod deflected
Extremely high tyre pressure
Abnormal noise from the rear suspension
Rear suspension liner thinned and softened
Failure of the rear shock absorber
Disassembling Rear Absorber
Remove the seat cushion assembly and the scooter body assembly.
Loosen tightening bolts on top of the rear shock absorber.
Loosen tightening bolts on bottom of the rear shock absorber.
Remove the rear shock absorber.
Disassembling Motor
Remove lock nuts from the motor.
Remove motor connection wires.
Remove the motor assembly.
Specifications of the Motor
Installation torque value for self-locking nut 1 in the figure: 75Nm
Motor oscillation value
：
Vertical oscillation limit
：
2.0mm
Lateral oscillation limit
：
2.0mm