Spring brake tension | |
Slack in the service line | |
Slack in the brakes | |
Air tank pressure |
Slack in the brakes | |
Air tank pressure | |
Slack in the service line | |
Spring brake tension |
Two brake systems use the same set of brake controls | |
Two sets of brake controls operate a single brake system | |
Two brake systems that each have their own set of controls | |
Two control systems that each have their own set of breaks |