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6 Inspection and adjustment BRAKE COMPONENTS 1-19 1.12 INSPECTION (SEMI-)TRAILER REACTION VALVE WABCO design Explanation of graph Curve of failure in circuit 1 B Curve of intact circuit 1 and circuit 2, or C Area for braking-pressure advance 1. Ensure there is sufficient system pressure. 2. Check whether air is escaping via the 3. Depress the brake pedal, and again check 4. Disconnect the line at port (42), and plug off 5. Depress the brake pedal, and check for 6. Reconnect the line. 7. Repeat the last three points, now for port 8. Operate the parking brake; pressure should R600122 2 1 42 22 12 43 3 11 41 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 P 22
(bar) P 41/42 (bar) R 600126 A B C C P 11/12 = 8 bar P 41/42 = 10 bar P 43 = 8 bar 4 ǹ 0006 |