How To Service A Bike Crank

This is how to overhaul the bottom bracket on an older style of bike before they started using sealed bearings.
How to service a bike crank. This tutorial will show you how to correctly take apart and rebuild a bottom bracket on a 3 piece crank system. If you feel a scraping hear a grinding. Bottom bracket overhaul bicycle maintenance. Crank adjustment chain line sunday aaron ross ex pro bmx bike repair finale bikemanforu duration.
Look in the bike s user manual or on the bike manufacturer s website to find out which size will fit your bike. Most cranks require a 4mm 8mm allen key. To know the service options you will need to know the type of crank and type of bottom bracket bearing system installed in the bicycle. Cranks may be removed to replace cranks or chainrings service the bottom bracket bearings or to clean the chainrings.
The bottom bracket is what allows your cranks to turn. Crank systems have become more complex in recent years. I hope this video is helpful for you. If your crank has bolts on both sides of the bike go to the other side of the bike and remove the other crank bolt.
Old school bikes cruisers or cheaper bikes employ a one piece crank with serviceable caged bearings inside the bottom bracket. Cranks may be removed to replace cranks or chainrings service the bottom bracket bearings or to clean the chainrings. Crank systems have become more complex in recent years. If your cranks are wobbly or there s a noise coming from between your cranks when you pedal then you may need to overhaul your bottom bracket this instructable a remix of friendofhumanity s.
Learn how to remove the crank on a bike with expert tips on bicycle repair in this free video clip. Tips for repairing a bike. This type of crank uses a sealed cartridge and is changed as a unit. The majority of entry level road and mountain bikes employ a two piece crank.
How to replace a crankset bike cranks are the important components that connect your pedals to the chain and bottom bracket converting your pedalling into the power that drives the rear wheel.