Operate poorly when under load | |
Show greater stopping power when lightly loaded | |
Show greater stopping power in bad weather | |
Vary with |
Allow excess air pressure to be released from air tanks | |
Allow water and oil to be expelled from air tanks | |
Deliver air from the air compressor to the air tanks | |
Deliver air from the air tanks to the air brakes |
100 | |
80 to 85 | |
60 | |
60 to 65 |