Mongoose 6061 - Troubleshooting Guide

Maintenance 6
63
TROUBLESHOOTING GUIDE
Problem Possible Cause Remedy
Gear shis not
working properly
• Derailleur cables scking/stretched/ damaged
• Front or rear derailleur not adjusted properly
• Indexed shiing not adjusted properly
• Lubricate/ghten/replace cables
• Adjust derailleurs
• Adjust indexing
Slipping chain • Excessively worn/chipped chain wheel or freewheel sprocket
teeth
• Chain worn/stretched
• S link in chain
• Non compable chain/chain wheel freewheel
• Replace chain wheel, sprockets and
chain
• Replace chain
• Lubricate or replace link
• Seek advice at a bicycle shop
Chain jumping o
freewheel sprocket or
chain wheel
• Chain wheel out of true
• Chain wheel loose
• Chain wheel teeth bent or broken
• Rear or front derailleur side-to-side travel out of adjustment
• Cross chaining and shiing under load
• Re-true if possible, or replace
• Tighten mounng bolts
• Repair or replace chain wheel/set
• Adjust derailleur travel
Constant clicking
noises when pedaling
• S chain link
• Loose pedal axle/bearing
• Loose boom bracket axle/bearings
• Bent boom bracket or pedal axle
• Loose crankset
• Lubricate chain/adjust chain link
• Adjust bearings/axle nut
• Adjust boom bracket
• Replace boom bracket axle or pedals
• Tighten crank bolts
Grinding noise when
pedaling
• Pedal bearings too ght
• Boom bracket bearings too ght
• Chain fouling derailleurs
• Derailleur jockey wheels dirty/binding
• Adjust bearings
• Adjust bearings
• Adjust chain line
• Clean and lubricate jockey wheels