BRAKE SYSTEM BLEED Master cylinder bleed

BRAKE SYSTEM BLEED Master cylinder bleed

Service repair no - 70.25.02

Preparation

• WARNING: Before bleeding the brake
• system refer to general brake service
• practice. See General Brake Service
• Practice
• Complete circuit bleed

• During bleed procedure, brake fluid level must not be allowed to fall below the MIN level. Keep reservoir topped up 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. MANUAL BLEED PROCEDURE.
2. PRESSURE 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 manufacturer’s instructions must be followed and the pressure must₂ not exceed 4.5 bar (65 lbf/in ).

Manual bleed procedure

Equipment required

• Clean glass receptacle
• Bleed hose
• Wrench
• Approx 2 litres (3.5 pints) brake fluid See LUBRICANTS, FLUIDS AND CAPACITIES, Information, Recommended lubricants and fluids

1. Disconnect battery.
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.
1. Fit bleed hose to any caliper bleed screw.
2. Dip free end of bleed hose into brake fluid in bleed bottle.
3. Open bleed screw of caliper.
4. Depress brake pedal fully several times until fluid is clear of air bubbles.
5. Keeping pedal fully depressed, tighten bleed screw, then release pedal.
6. Repeat the above procedure on remaining 3 calipers.
7. Fit all bleed screw protection caps.
8. Check/top-up fluid level when bleeding is complete. See Fluid Level Check / Top-Up