Schwinn none - Manual (Page 107)

88
Problem
Gear shifts not working properly
Slipping chain
Chain jumping off freewheel
sprocket or chainring
Constant clicking noises when
pedaling
Grinding noise when pedaling
Possible Cause
- Derailleur cables
sticking/stretched/damaged
- Front or rear derailleur not adjusted
properly
- Indexed shifting not adjusted properly
- Excessively worn/chipped chainring
or freewheel sprocket teeth
- Chain worn/stretched
- Stiff link in chain
- Non compatible chain/chainring/
freewheel
- Chainring out of true
- Chainring loose
- Chainring teeth bent or broken
- Rear or front derailleur side-to-side
travel out of adjustment
- Stiff chain link
- Loose pedal axle/bearings
- Loose bottom bracket axle/bearings
- Bent bottom bracket or pedal axle
- Loose crankset
- Pedal bearings too tight
- Bottom bracket bearings too tight
- Chain fouling derailleurs
- Derailleur jockey wheels
dirty/binding
Remedy
- Lubricate/tighten/replace cables
- Adjust derailleurs
- Adjust indexing
- Replace chainring, sprockets and
chain
- Replace chain
- Lubricate or replace link
- Seek advice at a bicycle shop
- Re-true if possible, or replace
- Tighten mounting bolts
- Repair or replace chainring/set
- Adjust derailleur travel
- Lubricate chain / Adjust chain link
- Adjust bearings/axle nut
- Adjust bottom bracket
- Replace bottom bracket axle or
pedals
- Tighten crank bolts
- Adjust bearings
- Adjust bearings
- Adjust chain line
- Clean and lubricate jockey wheels