Welkin WKEM002, User Manual

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damaged/faulty. Replace if faulty.
4. Seek diagnosis and repair
from authorized service
centre.
Reduced range
and/or speed
1. Under-charged battery.
2. Battery no longer
serviceable.
3. Low tyre pressure.
4. Brakes dragging.
5. Terrain, headwind, etc.
1. Charge the battery, Follow
the battery care procedures.
2. Have the battery checked,
Replace if faulty.
3. Inflate to recommended
pressure.
4. Adjust.
5. Normal
Gear change (where
applicable) rough /
not changing
1. Derailleur cables sticking /
stretched / damaged.
2. Derailleurs / shifter not
correctly set.
1. Lubricate / adjust / replace
cables.
2. Adjust.
Chain slip / Jumping off
sprockets
1. Worn sprockets.
2. Stretched chain.
3. Front sprocket loose / out
of true.
4. Sprocket teeth bent /
broken.
5. Derailleur / shifter not
correctly adjusted.
1. Replace.
2. Replace.
3. Re-true / tighten.
4. Replace.
5. Adjust.
Clicking noises
when pedaling
1. Stiff chain link.
2. Loose pedals / bearings.
3. Loose bottom bracket /
bearings.
4. Bent bottom bracket or
pedal bolt.
5. Loose pedal arm bolts.
1. Lubricate chain.
2. Tighten / adjust bearings.
3. Tighten / adjust bearings.
4. Replace.
5. Tighten.
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.
1. Replace.
2. Clean and degrease.
3. Lubricate / adjust / replace
cables.
4. Clean pivots.
5. Adjust.