| Weekly | |
| Never | |
| Daily | |
| Monthly |
| Deliver air from the air compressor to the air tanks | |
| Allow water and oil to be expelled from air tanks | |
| Deliver air from the air tanks to the air brakes | |
| Allow excess air pressure to be released from air tanks |
| Air tank pressure | |
| Spring brake tension | |
| Slack in the brakes | |
| Slack in the service line |