Removal of air from the hydraulic path of the clutch drive

Attention: The brake fluid used as a working fluid in the clutch drive path is one of the toxic and chemically aggressive compounds and, in contact with body panels, destroys the paintwork. Before proceeding with the procedure, cover the wings and front panel of the car with special covers, or just old blankets. Bleed the brake system while wearing goggles. If brake fluid accidentally gets into your eyes, rinse immediately with plenty of water and seek medical attention!

Attention: If the slightest amount of mineral oil gets into the brake fluid, the clutch will fail!

1. The hydraulic clutch release must be bled each time the components are removed or when the fluid level in the reservoir drops enough to allow air into the master cylinder. When bleeding, use only fresh brake fluid of the required grade (DOT-4). Make sure that the union connections of the hydraulic clutch path are tight.

Attention: Do not reuse liquid pumped out of the system, as well as liquid stored for a long time in a loosely closed container!

2. The hydraulic path is bled through a special connection using a set of special equipment that is used to bleed the service brake system.

Attention: Manual bleeding of the drive on models equipped with ABS is not allowed!

The general connection diagram of the kit is shown on Ref. illustrations - before using the kit, carefully read the instruction manual for its operation. The pumping equipment must be able to withstand an internal pressure of at least 2 bar.




3. On models equipped with manual transmission F13/F17 (ecex modifications) /F23 Remove the master cylinder reservoir cap and fill the reservoir with fresh hydraulic fluid, bringing the level to the MAX mark. Connect a special adapter to the tank and attach the MKM-6174-2 device to it (see illustration 4.2) - dip the free end of the hose into a suitable drainage container. Remove the protective cap of the bleeder plug and connect the MKM-6174-1 tool to it. Connect the other end of the device to the pumping device.

4. Turn on the pumping device, unscrew the fitting (see illustration 4.2) 2-3 turns, this will open the valve for pumping. Bleeding should be continued until no more air bubbles come out of the drain hose. Hand tighten the coupling, turn off the bleeder and remove the adapter from the brake fluid reservoir.

5. If necessary, pump the hydraulic line between the docking station and the clutch slave cylinder, for which connect the MKM-6174-2 tool to the MKM-6174-1 and lower the free end of the hose into a drain container with brake fluid. Ask an assistant to fully depress the clutch pedal and keep it pressed. After unscrewing the fitting, open the bleeding valve and wait until air / air bubbles come out of the duct. Hand tighten the clutch, and pull out and set the clutch pedal to the normal position. Wait approximately 5 seconds. Repeat the above operation 4 more times.


6. On models equipped with an Easytronic robotic gearbox, the device should only be used in conjunction with the TESN-2 diagnostic tool - carefully read the device's instructions. The MKM-6174-2 tool adapter is installed on a separate clutch fluid reservoir mounted on the gearbox housing. On models equipped with the Z13DT engine, first remove the inflator.

Attention: If the slightest amount of mineral oil gets into the brake fluid of the Easytronic system, the clutch will fail!

7. At the end of the procedure, tighten the coupling with a force of 5 Nm and remove all installed components.

8. Remove traces of brake fluid drips. Check the clutch drive for proper operation and all drive components for leaks. If necessary, adjust the brake fluid level in the reservoir (see chapter 1). The brake fluid level in the Easytronic reservoir must also be between the marks «MIN» And «MAX» (see resist. illustration).