| TEST RESULTS |
|---|
| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| First of all check whether the problem is accompanied by poor braking action. | Move on to Step 1 | There is also poor braking action. | Proceed as instructed in the diagnosis See table F001 POOR BRAKING ACTION |
| 1 | FLUID LEAKS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Visually inspect for fluid leaks in the braking system circuit. | Move on to Step 2 | 1. Fluid leak detected.2. Component defective. | 1. Retighten connectors2. Replace the defective component. |
| 2 | FLUID LEAKS FROM BRAKE PUMP CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Disconnect the check valve connector from the brake servo and introduce a pipe cleaner in order to reach the lowest part of the brake servo chamber. Check that there is no fluid in the chamber. | Move on to Step 3 | Fluid in the brake servo chamber. | Replace brake servo Op. 3330D02 BRAKE SERVO/BRAKE PUMP ASSEMBLY - R.R. |
| 3 | AIR IN THE CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check for any air in the braking circuit. | Move on to Step 4 | Air in the circuit. | Bleed the air from the system Op. 0010T65 HYDRAULIC BRAKE SYSTEM - BLEED AIR |
| 4 | CLEARANCE BETWEEN DRUM AND SHOES CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check the clearance between the shoes and the drum, measuring the difference between the diameter of the drum and the diameter of the brake measured on the centred shoe centre line. | Move on to Step 6 | Drum / shoe clearance not correct. | Move on to Step 5 |
| 5 | SELF-ADJUSTMENT DEVICE CORRECT OPERATION CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check the operation of the self-adjustment device, activating it several times. | Move on to Step 6 | Incorrect operation of self-adjustment device. | Replace the self-adjustment device. |
| 6 | CORRECT OPERATION CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
| Check that the fault is no longer present. | End of diagnosis | The fault is still present. | Check the operation of the other parts of the braking system (calliper, pipes, brake pump). |
