Bearings

Question 1

What are the steps for general bearing cleaning?

Answer 1

1. Disassembly
2. Thorough cleaning
3. Inspect: check for defects such as pitting or scaring on races and balls.
4. Replace worn bearings
5. Apply grease
6. Reassemble
7. Adjust bearings: no slack, bearings should spin freely and not wiggle or have play.

Question 2

What is a good rule to remember when disassembling wheel bearings?

Answer 2

Always remove cones from the left side (non-drive side).

Question 3

What are three things you need to look out for when doing a wheel bearing service?

Answer 3

• inspect ball bearings: check for defects.
• inspect cups and cones: check for pitting
• check for bends in the axles

Question 4

What bottom brackets are most common?

Answer 4

Square taper; it is serviceable and repairable.
Sealed cartridge style; solid unit

Question 5

What styles of head set bearings are there?

Answer 5

Threaded set style: on older bikes.
Threadless forks: bikes from 90s up

Question 6

The sealed cartridge style bottom bracket bearings have what type of threads?

Answer 6

Left hand (reverse) threads.

Question 7

There are two different tools for removing the crank arm. What are they called?

Answer 7

Square taper cranks (blue)
splined cranks (black)

Question 8

Where should the long half go when assembling the spindle?

Answer 8

On the right side of the bike (drive side).