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Removing and installing the slave cylinder > < Summary of components - Hydraulics

Octavia Mk2

Checking hydraulic clutch control (Octavia II)
Checking hydraulic clutch control (Octavia II)
  Note
t  If the master cylinder and/or slave cylinder must be replaced due to the predetermined fault, first of all check the hydraulic clutch control.
t  If the slave cylinder with the connected tube-hose line is removed from the gearbox, do no longer depress the clutch pedal. Otherwise, the piston can be pressed out of the slave cylinder and thus be destroyed.
   
t  The clutch hydraulic is connected to one of the chambers -arrow 2- of the brake fluid reservoir by the return hose -arrow 1-.
t  If there is no or little brake fluid in this chamber, there is a leak in the system.
t  Symptoms of an external leak are, amongst others, traces of brake fluid on or below the gearbox, as well as on the noise insulation under the gearbox.
t  In case of leakage, the corresponding component must be replaced → Electronic Catalogue of Original Parts.
t  Check the correct routing of the tube-hose line between the master and slave cylinder. The line must not be kinked or trapped.
t  The brake pedal return must not be obstructed by moved or additional covers (floor coverings).
Inspect the complete hydraulic system for leaks.
–  Carry out a visual inspection of the following components of the hydraulic clutch control for leaks:
t  Check brake fluid level in the brake fluid reservoir
t  Return hose between brake fluid reservoir and master cylinder
t  Master cylinder
t  Tube-hose line between master and slave cylinder
t  Connection points (plug and screw connections) also in a non-visible area
t  Slave cylinder
  N30-10140
–  Remove the slave cylinder (do not open the line system) and check if no brake fluid drips out of the bellows, to do so remove the bellows from the rod -arrow-.
–  Bleed the clutch system if necessary → Chapter.
–  Then depress the clutch pedal carefully, at the same time hold the pedal in five different positions for approx. 20s over the entire distance the pedal has to travel and check that the pedal does not fall through on its own while being held (in five positions). While doing so, a second mechanic must check if fluid is leaking from the other components of the hydraulic clutch control → Anchor.
  N30-10139

Removing and installing the slave cylinder > < Summary of components - Hydraulics