Possible malfunctions
If the following faults occur, it is necessary to check the hydraulic clutch system for fluid leaks and bleed air from the system:
- appearance of free play of the clutch pedal;
- the clutch pedal is in the middle or pressed position;
- difficulty shifting gears.
Possible consequences of contamination entering the hydraulic clutch system
The hydraulic clutch drive is very sensitive to contamination. If contaminants enter the system, they may result in the following consequences:
- inability to shift gears;
- damage or complete failure of the clutch hydraulic drive;
- leaks from the hydraulic clutch drive.
To bleed air from the hydraulic clutch drive, use the following equipment:
- installation for removing air from the hydraulic drive system through the brake fluid reservoir type OMA 883 f. "OMA" (Italy);
- syringe to remove air through the nipple located on the clutch slave cylinder.
Procedures for bleeding air from the hydraulic clutch drive
If the clutch hydraulic drive parts are removed
Perform air bleeding operations using an air bleeding device through the brake fluid reservoir or using a new syringe through the air bleeding nipple located on the clutch slave cylinder (brake fluid according to the current "Codifier of main and auxiliary materials used in maintenance and repair of LADA vehicles" K 3100.25100.00018).
If the clutch hydraulic drive parts are not removed
Perform air bleeding operations with a syringe only by injecting brake fluid through the air bleeding nipple on the clutch slave cylinder.
Place the vehicle on a two-post lift, apply the parking brake and turn off the ignition.
Remove the engine crankcase guard (see here).
Air bleeding procedure if no hydraulic drive parts are removed
[Original is available on this resource: ladaman.ru]
Removal air using a hydraulic system air removal unit
Secure the clutch pedal in the upper position using a strap attached to the steering wheel to ensure the integrity of the hydraulic drive during the bleeding operation.
Connect the unit for bleeding air from the hydraulic drive system to the brake fluid reservoir (unit for bleeding air from the hydraulic drive system type OMA 883 f. "OMA", Italy).
Remove plug 1, Figure 8-1, from the air bleed nipple on clutch slave cylinder 4.
Attach a clear tube to the air bleed nipple, lowering the other end into an empty container located above the air bleed nipple (transparent technological tube, technological vessel).
Press the lock 2 and pull the pipe 3 out one click to open the air bleed hole.
Figure 8-1 - Bleeding the Clutch Hydraulic System: 1 - air bleed nipple plug; 2 - retainer; 3 - pipeline connecting the master and slave cylinders of the clutch drive; 4 - clutch drive slave cylinder; 5 - gearbox
Open the system between the air bleeder and the brake fluid reservoir.
Wait until the brake fluid starts to flow out without bubbles.
Release the pressure in the clutch hydraulic drive by turning off the air bleeder.
Press the lock and install the pipeline into the working cylinder until it clicks.
Disconnect the transparent tube from the air bleed nipple and install the plug on the nipple.
Disconnect the air bleeder.
Add brake fluid to the master cylinder reservoir and bring its level up to normal. The brake fluid level should be between the "MAX" and "MIN" marks on the master cylinder reservoir.
Press the clutch pedal quickly twenty times.
Check the functionality of the clutch. If necessary, repeat the air removal operation.
Removal air with a syringe
Secure the clutch pedal in the upper position using a strap attached to the steering wheel to ensure the integrity of the hydraulic drive during the bleeding operation.
Remove the plug from the nipple 1, Figure 8-1, to remove air from the clutch slave cylinder 4.
Attach a transparent tube to the air bleed nipple so that it is at the same height as the tank (technological tube).
Press the lock 2 and pull the pipe 3 out one click to open the air bleed hole.
Pour brake fluid into the master cylinder reservoir until it flows out of the clutch hydraulic bleed nipple.
Attach a new clutch hydraulic bleed syringe to the end of the clear tube filled with 60 ml of brake fluid (technological syringe).
Slowly and completely force the brake fluid out of the syringe into the clutch hydraulic system, making sure that no air from the top of the syringe enters the system.
Press the lock and install the pipeline into the working cylinder until it clicks.
Disconnect the transparent tube from the air bleed nipple.
Place a plug on the bleed nipple.
Bring the brake fluid level in the master cylinder reservoir to normal. The brake fluid level should be between the "MAX" and "MIN" marks on the master cylinder reservoir.
Press the clutch pedal quickly twenty times.
Check the functionality of the clutch. If necessary, repeat the air removal operation.
Procedure for preparing for bleeding if hydraulic clutch drive parts are removed
Preparation of the pipeline
Fill the line, Figure 8-2, of the hydraulic clutch drive using a syringe.
Figure 8-2 - Clutch hydraulic line
Connect the filled line to the clutch slave cylinder to prevent brake fluid leakage.
Preparing the clutch hydraulic drive slave cylinder
Fill the slave cylinder, Figure 8-3, of the hydraulic clutch drive using a syringe under its own weight.
Figure 8-3 - Clutch hydraulic drive slave cylinder
Install the appropriate part (or details) on the car.
Procedure for bleeding air after removing part of the hydraulic system
Secure the clutch pedal in the upper position using a strap attached to the steering wheel to ensure the integrity of the hydraulic drive during the bleeding operation.
Remove the plug from the nipple 1, Figure 8-1, to remove air from the clutch slave cylinder 4.
Attach a transparent tube to the air bleed nipple so that it is at the same height as the tank (technological tube).
Press the lock 2 and pull the pipe 3 out one click to open the air bleed hole.
Pour brake fluid into the master cylinder reservoir until it flows out of the clutch bleeder nipple.
Attach a new syringe to the end of the clear tube, filled with 60 ml of brake fluid.
Slowly and completely force the fluid out of the syringe into the clutch hydraulic system, making sure that no air from the top of the syringe gets into the system.
Press the lock and install the pipeline into the working cylinder until it clicks.
Disconnect the transparent tube from the air bleed nipple.
Install a plug on the air bleed nipple. Bring the brake fluid level up to normal. The brake fluid level should be between the "MAX" and "MIN" marks on the master cylinder reservoir.
Press the clutch pedal quickly twenty times.
Check the functionality of the clutch.
If necessary, repeat the air removal operation.
Install the engine crankcase guard.