Bleeding the brake system and cheking for leaks — VW

Set up brake pedal operating device between driver`s seat and brake pedal and pretension it.

Take cap off reservoir. Attach the appropriate connector to the thread on the brake fluid container.

Pull on the connecting hose from appliance, attach to connector.
Align red finger of fluid capacity gauge with black finger so that amount of fluid used can be checked.

Set operating lever to 1.The pump then applies pressure to the brake fluid in the vehicle. Open the bleeder screws in brake calipers and wheel brake cylinders in the prescribed sequence. The used fluid which is bled from the system should be collected in the bleeder bottle.

Note:

On vehicles with brake pressure regulator press the regulator lever firmly towards the rear axle while bleeding the rear brakes.

Bleeding sequence is as follows:

1 -
Rear right wheel cylinder
2 -
Rear left wheel cylinder
3 -
Front right caliper
4 -
Front left caliper

Check the brake system for leaks. Set operating lever to 2 and watch gauge. The pressure gauge must not show a drop in pressure.
Remove brake pedal operating device.
Set operating lever to 0.

Then when no pressure is indicated on gauge, detach hose.

Check fluid lever in brake fluid container and if necessary siphon off surplus using a suction bottle.

Changing brake fluid

Prepare appliance as for bleeding.
Using the special suction bottle draw off as much brake fkuid as possible from the brake fluid container. (This ensures that the used fluid in the container is not pumped through the brake system).
Set up the brake pedal operating device between driver`s seat and brake pedal and pretension. Attach suitable connector to the thread of brake fluid container.
Pull the connecting hose from appliance and attach to connector.
Set operating lever to 1. Open the bleeder screws in the sequence shown in the following table, and allow the appropriate quantities of fluid to flow out. This ensures that the used brake fluid is pushed out of the system as new fluid is pumped in.

Sequence Whell cylinder/Calipert · Amount of fluid which must flow from cylinder/caliper
rear right · 500 cm3
rear left · 500 cm3
front right · 500 cm3
front left · 500 cm3

Check the brake system for leaks. Set operating lever to 2 and watch gauge. The gauge must not show a drop in pressure.
Remove brake pedal operating device.
Set operating lever to 0.

When the pressure gauge shows no pressure, detach hose.

Check fluid level in the brake fluid container and if necessary draw off surplus using a suction bottle.