How To Rebuild Coaster Brakes Repair Guide

Difficulty

Moderate

Steps

Time Required

                          45 minutes - 2 hours

Sections

How To Rebuild Coaster Brakes
11 steps

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Introduction

What you need

Step 1

              How To Rebuild Coaster Brakes

This step will be easier if you flip your bicycle upside down, and balance it on the seat and handlebars.
Loosen the nuts holding the axle in place using the two wrenches.
Unscrew the brake arm from the frame of the bicycle using the screwdriver.

This step will be easier if you flip your bicycle upside down, and balance it on the seat and handlebars.

Loosen the nuts holding the axle in place using the two wrenches.

Unscrew the brake arm from the frame of the bicycle using the screwdriver.

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Step 2

Loosen the nuts holding the axle in the wheel using the wrenches. Unscrew the axle, and remove the bearings and brake assembly. Set them off to the side on a rag.
When pulling the parts out, arrange them in the order in which you took them out. This way, you don’t forget the order.

Loosen the nuts holding the axle in the wheel using the wrenches. Unscrew the axle, and remove the bearings and brake assembly. Set them off to the side on a rag.

When pulling the parts out, arrange them in the order in which you took them out. This way, you don’t forget the order.

Step 3

Clean the inside of the wheel hub using a paper towel and some WD-40.
Be sure to wipe out excess grease and grit.
When done, set the wheel off to the side.

Clean the inside of the wheel hub using a paper towel and some WD-40.

Be sure to wipe out excess grease and grit.

When done, set the wheel off to the side.

Step 4

Add some soap to the water in the plastic tub, and mix it around
A small squirt of soap will do. Too much soap, and you’ll have to deal with excess bubbles.

Add some soap to the water in the plastic tub, and mix it around

A small squirt of soap will do. Too much soap, and you’ll have to deal with excess bubbles.

Step 5

Clean all of the internal parts in the tub using the toothbrush.
You may occasionally have to wipe excess grease and grit off of the toothbrush with a paper towel.
Be sure to get all of the areas where the bearings will sit (see red circles)
Also scrub the threads on the sprocket (see orange line)

Clean all of the internal parts in the tub using the toothbrush.

You may occasionally have to wipe excess grease and grit off of the toothbrush with a paper towel.

Be sure to get all of the areas where the bearings will sit (see red circles)

Also scrub the threads on the sprocket (see orange line)

Step 6

When cleaning the bearings, spin the balls to help remove grit from inside.

When cleaning the bearings, spin the balls to help remove grit from inside.

Step 7

Dry the parts using a paper towel.
When dry, set them off to the side on a rag.
Be sure to keep them in order

Dry the parts using a paper towel.

When dry, set them off to the side on a rag.

Be sure to keep them in order

Step 8

Reassemble the parts of the bearing and axle assembly which go on the opposite side of the hub from the sprocket. This includes the brake pads and the cone
Using your fingers, make sure the bearings are well coated with grease.
Make sure to add some grease at key points shown (red lines).

Reassemble the parts of the bearing and axle assembly which go on the opposite side of the hub from the sprocket. This includes the brake pads and the cone

Using your fingers, make sure the bearings are well coated with grease.

Make sure to add some grease at key points shown (red lines).

Step 9

Put the axle and bearings back into the cleaned hub.
Make sure that you put the axle in from the side opposite where the sprocket is.
If you don’t remember, look at your tire. Most tires have an arrow pointing in the direction the wheel turns when you go forward. The axle should go in from the side where the arrow points counter-clockwise

Put the axle and bearings back into the cleaned hub.

Make sure that you put the axle in from the side opposite where the sprocket is.

If you don’t remember, look at your tire. Most tires have an arrow pointing in the direction the wheel turns when you go forward. The axle should go in from the side where the arrow points counter-clockwise

Step 10

Gently screw the sprocket into the hub.
Screw the bearing race on. Make sure not to tighten too much. The sprocket and wheel should still spin easily.
Remember to place the bearings in the right spot. The large one is placed as shown by the red line, and the small one as shown by the orange line.

Gently screw the sprocket into the hub.

Screw the bearing race on. Make sure not to tighten too much. The sprocket and wheel should still spin easily.

Remember to place the bearings in the right spot. The large one is placed as shown by the red line, and the small one as shown by the orange line.

Step 11

Replace the wheel onto the bicycle.
Don’t forget to put the chain around the sprocket!
Make sure the wheel is straight relative to the bicycle, and that the chain is relatively taut.
Tighten the nuts to hold the wheel in place.
Before continuing, spin the wheel and crank the pedals to make sure everything spins smoothly. If not, check to make sure the axle nuts aren’t too tight.

Replace the wheel onto the bicycle.

Don’t forget to put the chain around the sprocket!

Make sure the wheel is straight relative to the bicycle, and that the chain is relatively taut.

Tighten the nuts to hold the wheel in place.

Before continuing, spin the wheel and crank the pedals to make sure everything spins smoothly. If not, check to make sure the axle nuts aren’t too tight.

Congratulations! You’ve finished cleaning your coaster brake. Test-ride the bicycle. Listen to make sure that there are no grinding noises. Be sure to test the brake several times. When you’re done, make sure all the nuts are still tight.

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                                                                                      4 other people completed this guide.

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                    Jacob Reiter

Member since: 04/09/2015

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                       Cal Poly, Team 28-6, Green Spring 2015                        

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                                            10 Guides authored

abdelrahman - Jan 15, 2019

I have Huffy coaster bike 26”, i’m trying to change the rear tire bearing but I don’t know the size of it. the outside ones are 3/16 X9, but I need to know the size of the small inner one at the gear it was 7 balls.

Ethan Miller - Nov 21, 2022

Can you explicitly say which order the parts go back in?

It should be easy, but I can’t quite get it straight.

Introduction#

What you need#

Team#

Introduction

What you need

Team