Schwinn 12in Tiger Owner's Manual page 64

Problem
Grinding noise when pedaling
Freewheel does not rotate
Brakes not working effectively
When applying the brakes
they squeal/squeak
Knocking or shuddering
when applying brakes
64
©2010
Possible Cause
• Pedal bearings too tight
• Bottom bracket bearings too tight
• Chain fouling derailleurs
• Derailleur jockey wheels dirty/binding
• Freewheel internal pawl pins are jammed
• Brake pads worn down
• Brake pads/rim greasy, wet or dirty
• Brake cables are binding/
stretched/damaged
• Brake levers are binding
• Brakes out of adjustment
• Brake pads worn down
• Brake pads toe-in incorrect
• Brake pads/rim dirty or wet
• Brake arms loose
• Bulge in the rim or rim out of true
• Brake mounting bolts loose
• Brakes out of adjustment
• Fork loose in head tube
Remedy
• Adjust bearings
• Adjust bearings
• Adjust chain line
• Clean and lubricate jockey wheels
• Lubricate. If problem persists,
replace freewheel
• Replace brake pads
• Clean pads and rim
• Clean/adjust/replace cables
• Adjust brake levers
• Center brakes
• Replace pads
• Correct pads toe-in
• Clean pads and rim
• Tighten mounting bolts
• True wheel or take to a bike shop for repair
• Tighten bolts
• Center brakes and/or
adjust brake pads toe-in
• Tighten headset