Discovery I (LJ) V8-4.0L (1996)
Brake Bleeding: Service and Repair
BRAKE SYSTEM BLEEDING
The following method for bleeding the hydraulic brake system applies to both ABS and NON ABS vehicles.
Preparation
^ During bleed procedure, brake fluid level must not be allowed to fall below the MIN level. Keep reservoir topped to the MAX level.
^ To bleed the hydraulic circuits four bleed nipples are provided, one at each caliper.
^ There are two methods by which air can be removed from the braking system:
1. Pressure bleed procedure.
2. Manual bleed procedure.
Pressure bleed procedure
Purpose designed equipment for pressure filling and bleeding of hydraulic systems may be used on Land Rover vehicles. The equipment
manufacturers instructions must be followed and the pressure must not exceed 4.5 bar.
Manual bleed procedure
Equipment required
^ Clean glass receptacle
^ Bleed hose
^ Wrench
^ Approx 2 liters brake fluid
Master cylinder bleed
1. Disconnect the battery negative lead.
2. Depress brake pedal fully and slowly 5 times.
3. Release the pedal and wait for ten seconds.
4. Air bubbles will rise into the reservoir during these instructions.
5. Repeat instructions until a firm resistance is felt at the pedal.
Complete circuit bleed
1. Disconnect the battery negative lead.
2. Fit bleed hose to any caliper bleed screw.
3. Dip free end of bleed hose into brake fluid in bleed bottle.
4. Open bleed screw of caliper.
5. Depress brake pedal fully several times until fluid is clear of air bubbles.
6. Keeping pedal fully depressed, tighten bleed screw, then release pedal.
7. Repeat the above procedure on remaining three calipers.
8. Fit all bleed screw protection caps.
9. Check/top-up fluid level when bleeding is complete.