Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Brake Master Cylinder and Fluid Reservoir

Brake master cylinder and fluid reservoir

  1. Brake fluid reservoir cap
  2. Brake fluid level switch
  3. Brake fluid reservoir
  4. Secondary circuit inlet port
  5. Primary circuit inlet port
  6. Brake master cylinder
  7. Secondary circuit outlet port
  8. Primary circuit outlet port
  9. Clutch circuit outlet port (manual transmission only)

The brake master cylinder is attached to the front of the brake booster, on the driver's side of the engine compartment. The brake master cylinder is a tandem design that supplies pressure to two independent (primary and secondary) hydraulic circuits. Each circuit is connected between the calipers of diagonally opposing front and rear wheels to provide a fail safe brake system.

A reservoir is mounted on top of the master cylinder and retains sufficient volume of hydraulic fluid to allow for normal system use, and to compensate for the replenishment of the system as the brake linings wear. The reservoir is internally divided to provide an independent supply of fluid to each brake circuit, and prevents a single fluid leak from disabling both primary and secondary brake circuits. If a failure occurs in one brake hydraulic circuit the remaining circuit will still operate effectively, although brake pedal travel and vehicle braking distances will increase.

On vehicles with manual transmission, the brake fluid reservoir also supplies hydraulic fluid for operation of the clutch assembly

Brake Fluid Level Switch

Brake Fluid Level Switch

  1. Contact carrier
  2. Contact
  3. Float

The reservoir incorporates a brake fluid level switch that is hardwired to the Central Junction Box (CJB). When the reservoir fluid falls to a predetermined low level, the switch contacts close and provide a signal feed back to the CJB. The CJB then sends a message on the High Speed (HS) Controller Area Network (CAN) Powertrain bus to the Instrument Cluster (IC), which illuminates the brake fluid warning indicator lamp.

    READ NEXT:

     Hydraulic Control Unit (HCU)

    Anti-lock Brake System (ABS) control module Secondary circuit port Left front caliper port Right front caliper port Primary circuit port Left rear caliper port Right rear caliper port Hydra

     Parking Brake and Actuation Electronic Parking Brake Release When the Vehicle Has no Electrical Power (G1785116) / General Procedures

    CHECK WARNING: Chock the wheels and make sure that all personnel are clear of the vehicle before carrying out the following procedure NOTES: To be carried out in the event that the vehicle has no el

     Parking Brake and Actuation Parking Brake Release Actuator (G1785118) / Removal and Installation

    PART(S) REMOVAL NOTE: Removal steps in this procedure may contain installation details. Connect the diagnostic tool and set the electric park brake (EPB) to the maintenance position. NOTE: This step

    SEE MORE:

     Engine Cooling - Ingenium i4 2.0l Diesel Cooling Fan Motor and Shroud (G1879558)/ Removal and Installation

    REMOVAL WARNING: Cooling fans may continue to operate after the engine is turned off. They may also start to operate after the engine is turned off and continue operating for up to 10 minutes. CAUTION: Be prepared to collect escaping coolant. NOTES: Some variation in the illustrations may occur,

     Parking Brake and Actuation Electronic Parking Brake Release When the Vehicle Has no Electrical Power (G1785116) / General Procedures

    CHECK WARNING: Chock the wheels and make sure that all personnel are clear of the vehicle before carrying out the following procedure NOTES: To be carried out in the event that the vehicle has no electrical power. Right hand illustration shown, left hand is similar. Disconnect the battery groun

    © 2019-2024 Copyright www.lrdisc.com