| 摘要 |
Hydraulic brake apparatus for a vehicle having spring-applied, fluid pressure-released brakes (10), the brakes (10) being applied by the failure or loss of vehicle hydraulic pressure. The technical problems involve the release of the brakes when system hydraulic pressure fails or is lost, the bleeding of the brakes (10), and the checking of the transmission system. The solution includes the structure of a manual pump (28) connected to the brake system, a terminal board (14) having ports (16, 18, 20) terminating the system fluid pressure line (22), the brake line (12) and the pump pressure line (76) and a U-tube (120) connecting the ports (16, 18, 20) on the terminal board (14) The invention further includes a valve (140) for isolating a supply line (134) while venting a brake line (133) for checking system pressure. A limit switch (200) prevents engine starting while the brakes (13) are manually released. |
