BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car



BMW E39
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
- Coupling and power shafts
   - Coupling
      Removal, installation and check of coupling
      Removal of air from a coupling hydraulic actuator
      Removal and installation of the mechanism of switching off of coupling
      Removal and installation of the working cylinder of coupling
   + Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics





Removal of air from a coupling hydraulic actuator

It is necessary to remove air from a hydraulic system of the drive of coupling if the pedal of coupling does not come back or comes back to a starting position slowly, unhooking of transfer happens unsatisfactorily or if the hydraulic system was opened.

As the hydraulic system of coupling uses brake fluid, it is necessary to observe the relevant requirements provided in the Head the Brake system.

At the process of removal of air described here without use of the special device in system there can be an air quantity. A sign of it is existence of characteristic noise and unsatisfactory unhooking of transfers. In this case it is necessary to remove air from system on HUNDRED with use of the special device.


 PERFORMANCE ORDER

1. Remove the lower guard of a motive compartment, address the Section Removal and installation of the lower guard of a motive compartment.
2. Check the level of brake fluid in the tank. If necessary add liquid before Max marking, address the Section Check of Levels of Liquids.

3. Remove a cap from the air pumping union (the shooter on an accompanying illustration) on the working cylinder. Put on a transparent hose the union.

4. Carefully release approach to the union. The otvorachivaniye of the union requires a cap key not to damage a hexagon.
5. Lower the free end of a hose in the container with brake fluid to exclude an air podsasyvaniye.
6. Ask the assistant to press a coupling pedal about 10 times against the stop and to leave it pressed.
7. In this situation open the union (3). Brake fluid will begin to follow. When the following liquid ceases to contain vials of air, wrap the union.

Level of brake fluid in the tank should not go down too strongly. For this purpose add liquid.

8. Release a coupling pedal. Again press about 10 times a pedal and leave it in such situation. Repeat this process so many time how many it is necessary in order that air did not come out any more. At the same time constantly add new liquid to system.
9. Wrap the union on the working cylinder. Remove a hose and put on a cap.
10. Lower the car on wheels.
11. Fill in in system brake fluid to the mark Max.
12. Check operation of the brake system and coupling.

Removal of air by means of the special device

In auto repair shops air from a hydraulic system of coupling is removed, as a rule, by means of the special device. The device creates the excessive pressure of liquid in system.

 PERFORMANCE ORDER

1. Turn off fastening bolts on the tank of brake fluid. Take out the tank.
2. Attach the device for removal of air according to the instruction.
3. Put on a hose the union of removal of air. Lower the end of a hose in capacity.
4. Open the union and you keep it in such situation, vials of air will not cease to be allocated yet. Close the union.
5. Remove the device.
6. Slowly press about 10 times a coupling pedal against the stop and again release it.
7. Remove the working cylinder from the check point. Do not disconnect a hydrowire, address the Section Removal and installation of the working cylinder of coupling.

8. Open the air pumping union. Press against the stop on a rod (1) of the working cylinder so that any more vials of air were not allocated. At the same time the union has to look upward. Close the union and let's a rod come back slowly. Address an accompanying illustration.

It is impossible to press a coupling pedal at the removed working cylinder.

9. Install into place the tank of brake fluid. Fill in liquid to the mark Max. Close the tank a stopper.
10. Install a box of the filter of clean air.