Failure Diagnosis - Jiangsu Niu Electric Technology N1S Operation & Maintenance Manual

Front wheel/front suspension
Preparation

Failure diagnosis

Front wheel
Steering handle
Front fork
Preparation
Operation notes
Support the scooter body bottom with jacks before removal of the front wheel. The front wheel should not
be turned reversely when it is in touch with the ground.
There should be no grease that adheres to brake shoes, brake shoe assemblies and brake discs in
operating.
scooter reference
Measurement
position
Front wheel axle
Front wheel
Torque value
Tightening bolts on the steering handle assembly 40-60 N•m
rod
Front axle
Tightening bolts on the front shock absorber
Failure diagnosis
The steering handle is difficult to turn.
The steering handle bearing failed.
The steering handle bearing is damaged.
The tire pressure is too low.
There is air leakage from the tire.
Steering is unstable.
The steering handle bearing is damaged.
The tire pressure is insufficient.
The front fork and front axle are deflected.
Item
Deflection
Vertical
Rim
oscillation
Lateral
Standard
value (mm)
Within 1.0
Tool
55-62 N•m
18-28 N•m
- 27 -
小牛电动
Niu Electric
Usability limit (mm)
0.2
2.0
2.0
Bearing removal
Tightening nut spanner