1. Start by giving your pedals a good cleanJonny Ashelford / Immediate Media
Remove the pedal from the bike and give it a good clean.
Holding the pedal body in one hand, use Shimano’s PD40 tool (or a stout pair of pliers) to unscrew the axle, turning the collar in the opposite direction to the ‘tighten’ arrow.
2. Remove the ball bearings
2. Make sure you have a dish or similar to catch the ball bearingsJonny Ashelford / Immediate Media
Insert a 6mm Allen key into the end of the axle.
Use a 7mm spanner to remove the first nut from the other end (anticlockwise).
Repeat on the second nut, with a 10mm spanner.
Remove the axle’s bearing housing, using a dish to catch the loose ball bearings.
3. More cleaning
3. Use degreaser and and a clean ragJonny Ashelford / Immediate Media
Remove all the bearings carefully and clean them with degreaser and a rag.
Remove the bearing race, threaded barrel and rubber seal from the axle, noting their order and orientation.
Clean all the parts of the pedal axle with degreaser and rags.
4. Replace the bearings
4. Form a neat ringJonny Ashelford / Immediate Media
Replace the seal, barrel and bearing race on the axle in the correct order.
Grease the concave end of the bearing race and use a magnetic screwdriver to install 12 bearings.
Push them onto the outer edge of the race to form a neat ring.
5. Grease the housing
5. Use a magnetic screwdriver to install the remaining bearingsJonny Ashelford / Immediate Media
Grease one end of the bearing housing and use the magnetic screwdriver to install the remaining 12 bearings.
Slide the housing onto the axle with the bearing-free end first, so that there are bearings on either end of the housing.
6. Use a 10mm spannerJonny Ashelford / Immediate Media
Thread the 10mm cone nut onto the axle (clockwise, tapered end first).
Tighten it with a 10mm spanner until the bearings are free of play but not restricted.
Install the 7mm lock nut and tighten it against the cone using both spanners.
Check for play or friction.
7. Grease and reinstall
7. Tighten gentlyJonny Ashelford / Immediate Media
Grease the axle and reinstall it in the pedal body, turning it in the direction of the ‘tighten’ arrow.
Gently tighten the axle against the pedal body using the PD40 tool or pliers.
Grease the external threads and reinstall the pedal on the bike.
Jargon Buster: magnetic screwdriver
Make your own magnetic screwdriverJonny Ashelford / Immediate Media
A magnetic-tipped screwdriver is invaluable when removing and installing bearings. Don’t have one? You can magnetise a normal screwdriver by rubbing a magnet along its length several times in the same direction.