Brakes system - bleed - MGF trophy

BRAKES SYSTEM - BLEED - MGF TROPHY

Service repair no - 70.25.02

Adjust

1. The following procedure covers bleeding the complete system but where only the primary or secondary circuit have been disturbed in isolation, it should only be necessary to bleed that system. Partial bleeding of the hydraulic system is only permissible if a brake pipe or hose has been disconnected with only minor loss of fluid.

CAUTION: Never re-use fluid that has been bled from the system.

2. Raise front and rear of vehicle.

WARNING: Do not work on or under a vehicle supported only by a jack. Always support the vehicle on safety stands.

3. Check all pipe and hose connections are tight and there are no signs of leakage.
4. Top-up brake fluid level to ’MAX’ mark.

CAUTION: Use only new brake fluid of the recommended grade.

5. Bleed sequence - non ABS and ABS systems: LH rear to RH rear, RH front to LH front. Note that the front calipers on MG-F Trophy incorporate 2 bleed screws on each caliper. When bleeding this system, bleed the outer bleed screw followed by the inner bleed screw in the same sequence as stated.

CAUTION: Braking efficiency may be seriously impaired if wrong bleed sequence is used.

6. Clean area around bleed screws and remove dust seals.

7. Attach bleed tube to LH rear brake caliper bleed screw, submerge free end of tube in brake fluid in a clear container.
8. Apply pressure to brake pedal several times, then apply steady pressure.
9. Loosen bleed screw to release brake fluid and air. Allow pedal to return unassisted.
10. Depress brake pedal steadily through its full stroke and allow to return unassisted. Repeat procedure until a flow of clean air-free fluid is purged into container then, whilst holding brake pedal at end of downward stroke, tighten bleed screw to 10 Nm.

CAUTION: Maintain brake fluid level above ’MIN’ mark during this procedure.

11. Top-up brake fluid level.
12. Repeat procedure at each wheel in the sequence shown.

CAUTION: Braking efficiency may be seriously impaired if wrong bleed sequence is used.

13. Remove tube from bleed screw and fit bleed screw dust cap.
14. Apply brakes and check for leakage.
15. Road test vehicle. Check brake pedal for short firm travel when brakes are applied.