6 Maintenance
44
tRouBLeshootING GuIDe
Problem
Possible Cause
Remedy
Gear shifts not
working properly
• Derailleur cables sticking/stretched/ damaged
• Front or rear derailleur not adjusted properly
• Indexed shifting not adjusted properly
• Lubricate/tighten/replace cables
• Adjust derailleurs
• Adjust indexing
Slipping chain
• Excessively worn/chipped chainring or freewheel sprocket
teeth
• Chain worn/stretched
• Stiff link in chain
• Non compatible chain/chainring freewheel
• Replace chainring, sprockets and chain
• Replace chain
• Lubricate or replace link
• Seek advice at a bicycle shop
Chain jumping off
freewheel sprocket or
chainring
• Chainring out of true
• Chainring loose
• Chainring teeth bent or broken
• Rear or front derailleur side-to-side travel out of adjustment
• Cross chaining and shifting under load
• Re-true if possible, or replace
• Tighten mounting bolts
• Repair or replace chainring/set
• Adjust derailleur travel
Constant clicking
noises when pedaling
• Stiff chain link
• Loose pedal axle/bearing
• Loose bottom bracket axle/bearings
• Bent bottom bracket or pedal axle
• Loose crankset
• Lubricate chain/adjust chain link
• Adjust bearings/axle nut
• Adjust bottom bracket
• Replace bottom bracket axle or pedals
• Tighten crank bolts
Grinding noise when
pedaling
• Pedal bearings too tight
• Bottom bracket bearings too tight
• Chain fouling derailleurs
• Derailleur jockey wheels dirty/binding
• Adjust bearings
• Adjust bearings
• Adjust chain line
• Clean and lubricate jockey wheels
Schwinn Folding Bicycle Manual.indb 44
7/1/14 3:59 PM