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Hubs and Bearings
Heavy Duty Trucks / Course 12
| Question | Answer |
|---|---|
| A unitized hub does not need to have bearing end play adjusted during installation. | It is pre-set during manufacturing. |
| A blue /black wheel bearing means? | The bearing adjustment was too tight or not sufficiently lubricated. |
| When replacing a wheel bearing you should: | Replace both cone and cup, prelube the bearings, and use a race driver to install cups. |
| The TMC says wheel bearing end play should be: | Measured with a dial indicator. |
| The hub assembly supports: | both the drum and the wheel. |
| Which seal fits tightly to both the hub and the axle spindle and spins within itself? | Unitized |
| Loose wheel bearings can cause: | Wheel seal failure, tire wear, and uneven brake wear. |