Possible malfunctions
If the following malfunctions occur, check the hydraulic clutch system for fluid leaks and remove air from the system:
- the appearance of a free play of the clutch pedal;
- finding the clutch pedal in the middle or depressed position;
- difficulty shifting gears.
Possible consequences of contamination entering the hydraulic clutch system
The hydraulic clutch actuator is very sensitive to contamination. The entry of contaminants into the system can lead to the following consequences:
- inability to shift gears;
- damage or complete failure of the clutch hydraulic drive;
- hydraulic clutch leaks.
Use the following equipment to bleed the hydraulic clutch actuator:
- installation for removing air from the hydraulic drive system through the brake fluid tank type OMA 883 f. "OMA" (Italy);
- a syringe for removing air through a fitting located on the clutch slave cylinder.
Procedures for removing air from the hydraulic clutch drive
If hydraulic clutch parts are removed
Perform bleed operations with a bleeder through the brake fluid reservoir or with a new syringe through the bleeder fitting located on the clutch slave cylinder (brake fluid according to the current "Codifier of the main and auxiliary materials used in the maintenance and repair of LADA vehicles" K 3100.25100.00018).
If the hydraulic clutch parts are not removed
Perform bleed operations with a syringe only by injecting brake fluid through the bleed valve on the clutch slave cylinder.
Place the vehicle on a two-post lift, apply the parking brake and turn off the ignition.
Remove engine crankcase protection (see here).
Bleeding Procedure If No Hydraulic Drive Parts Have Been Removed
Bleeding with a hydraulic bleeder
Lock the clutch pedal in the up position with a strap attached to the steering wheel to ensure hydraulic integrity during the bleed operation.
Attach the device for removing air from the hydraulic drive system to the brake fluid reservoir (installation for removing air from the hydraulic drive system type OMA 883 f. "OMA", Italy).
Remove plug 1, Figure 8-1, from the bleed valve on clutch slave cylinder 4.
Connect a transparent tube to the bleeder fitting by dropping the other end into an empty vessel above the bleeder bleeder (transparent technological tube, technological vessel).
Press the latch 2 and pull out the pipeline 3 by one click to open the air vent hole.
Figure 8-1 - Bleeding the hydraulic clutch system: 1 - a plug of the union for removal of air; 2 - latch; 3 - pipeline connecting the main and working cylinders of the clutch drive; 4 - working cylinder of the clutch drive; 5 - gearbox
Open system between bleeder and brake fluid reservoir.
Wait until the brake fluid flows out without bubbles.
Depressurise the hydraulic clutch by turning off the bleeder.
Press the latch and install the pipeline into the working cylinder until it clicks.
Disconnect the transparent tube from the bleed valve and install the plug on the valve.
Disconnect the bleeder unit.
Add brake fluid to the master cylinder reservoir and top up the level. The brake fluid level must be between the marks "MAX" And "MIN" on the master cylinder reservoir.
Press the clutch pedal twenty times quickly.
Check clutch operation. If necessary, repeat the bleed operation.
Removing air with a syringe
Lock the clutch pedal in the up position with a strap attached to the steering wheel to ensure hydraulic integrity during the bleed operation.
Remove the plug from the fitting 1, Figure 8-1, to bleed air from the slave cylinder 4 of the clutch actuator.
Attach the transparent tube to the bleed valve so that it is at the same height as the tank (technological tube).
Press the latch 2 and pull out the pipeline 3 by one click to open the air vent hole.
Pour brake fluid into the master cylinder reservoir until it flows out of the hydraulic clutch bleeder port.
Attach a new hydraulic clutch bleeder to the end of the clear tube filled with 60ml of brake fluid (technological syringe).
Slowly and completely expel the brake fluid from the syringe into the hydraulic clutch actuator, being careful not to allow air from the top of the syringe to enter the system.
Press the latch and install the pipeline into the working cylinder until it clicks.
Disconnect the transparent tube from the bleed valve.
Place a plug on the bleed valve.
Top up the brake fluid level in the master cylinder reservoir. The brake fluid level must be between the marks "MAX" And "MIN" on the master cylinder reservoir.
Press the clutch pedal twenty times quickly.
Check clutch operation. If necessary, repeat the bleed operation.
Procedure for preparing to bleed if hydraulic clutch parts are removed
Pipeline preparation
Fill the pipeline, Figure 8-2, of the hydraulic clutch actuator with a syringe.
Figure 8-2 - Clutch Hydraulic Piping
Connect a filled line to the clutch slave cylinder to prevent leakage of brake fluid.
Preparing the hydraulic clutch slave cylinder
Fill the slave cylinder, Figure 8-3, of the hydraulic clutch with a syringe under its own weight.
Figure 8-3 - Clutch slave cylinder
Install the corresponding part (or details) on the car.
Bleeding procedure after removing part of the hydraulic system
Lock the clutch pedal in the up position with a strap attached to the steering wheel to ensure hydraulic integrity during the bleed operation.
Remove the plug from the fitting 1, Figure 8-1, to bleed air from the slave cylinder 4 of the clutch actuator.
Attach the transparent tube to the bleed valve so that it is at the same height as the tank (technological tube).
Press the latch 2 and pull out the pipeline 3 by one click to open the air vent hole.
Pour brake fluid into the master cylinder reservoir until it flows out of the clutch bleeder port.
Connect a new syringe to the end of the transparent tube filled with 60 ml of brake fluid.
Slowly and completely expel the fluid from the syringe into the hydraulic clutch, making sure that air from the top of the syringe does not enter the system.
Press the latch and install the pipeline into the working cylinder until it clicks.
Disconnect the transparent tube from the bleed valve.
Install a plug on the bleed valve. Top up the brake fluid level. The brake fluid level must be between the marks "MAX" And "MIN" on the master cylinder reservoir.
Press the clutch pedal twenty times quickly.
Check clutch operation.
If necessary, repeat the bleed operation.
Install the engine crankcase protection.