Welkin WKES001, User Manual

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5. Loose pedal arm bolts.
Grinding noise
when pedaling
1. Pedal bearings too tight.
2. Bottom bracket bearings
too tight.
3. Rear wheel not straight.
4. Chain too tight.
5. Derailleur dirty.
1. Adjust.
2. Adjust.
3. Align so chain is straight.
4. Adjust.
5. Clean and lubricate.
Brakes not
effective
1. Pads worn.
2. Pads / discs dirty.
3. Brake cables binding /
stretched /
damaged.
4. Brakes levers binding.
5. Brakes require adjustment.
1. Replace.
2. Clean and degrease.
3. Lubricate / adjust / replace
cables.
4. Clean pivots.
5. Adjust.
Brakes squeal 1. Pads / discs dirty.
2. Brakes not centred.
3. Calliper fasteners loose.
1. Clean and degrease.
2. Centre brakes and adjust.
3. Tighten.
Brakes chatter / vibrate 1. Brake mounting bolts
loose.
2. Brakes out of adjustment.
3. Steering head bearings
loose.
1. Tighten.
2. Centre brakes and adjust.
3. Adjust bearings.
Wheel vibration / wobble 1. Axle bent or broken.
2. Wheel out of true.
3. Wheel hub bearings loose /
not
serviceable.
4. Quick-release (if equipped)
mechanism loose.
1. Replace.
2. True wheel.
3. Adjust / replace.
4. Adjust.
Steering not accurate 1. Wheels not aligned to
frame.
2. Steering head loose /
binding.
3. Front forks or frame bent.
1. Align wheels.
2. Adjust.
3. Straighten.
Motor "clicks" / has reduced
power and/or shuts off
1. Under-charged battery.
2. Motor internal fault.
1. Charge battery. Follow
battery care procedures.
2. Replace.
No power when pedal
assistance switched ON
1. Blown fuse.
2. Loose connectors / wiring
damage.
3. Faulty switch.
4. Faulty controller.
1. Replace.
2. Check connectors / wiring.
Replace
as required.
3. Replace.
4. Replace.