Volkswagen Golf / Golf GTI / Jetta. Manual — part 476

47-48

Vacuum pump for brake booster
(vehicles with Diesel engines), removing
and installing

Removing

- Remove retainer for wiring harness from vacuum

pump.

Note:

- Loosen vacuum hose clamp (arrow -A- ) and

remove hose from pump.

- Remove bolts (arrow -B-) on flange.

- Remove vacuum pump.

The vacuum pump cannot be repaired.

Brake booster/brake master cylinder for vehicles with ABS/EDL/ASR/ESP, servici...

47-49

Installing

Note:

When installing the vacuum pump be
sure that the follower engages
correctly with the camshaft.

- Install bolts (arrows -B-) on

cylinder head flange.

- Secure vacuum hose with clamp

(arrow -A-).

- Check function of check valve -A-.

Air must pass through in

direction of arrow.

Valve must remain closed in

opposite direction.

- Make sure that the check valve is

installed correctly.

Brake booster/brake master cylinder for vehicles with ABS/EDL/ASR/ESP, servici...

47-50

Brake
booster/brake
master cylinder for
vehicles with
ABS/EDL/ASR/ESP
Mark 60 from m.y.
10.00, assembly
overview

Note:

Complete master cylinder and
brake booster can be replaced
independently of each other.

1 - Brake booster

On gasoline engines

the vacuum required
is taken from the
intake manifold.

On Diesel engines a

vacuum pump is
installed to create the
required vacuum.

On some vehicles an

electrical brake
system vacuum pump
-V192- is installed

Functional check

- With engine not

running, depress
brake pedal firmly
several times (to
exhaust the
vacuum in the unit).

Brake booster/brake master cylinder for vehicles with ABS/EDL/ASR/ESP Mark 6...

47-51

- Now

depress
brake
pedal with
average
foot
pressure,
hold and
start
engine. If
the brake
booster is
working
properly,
the pedal
will be felt
to give
slightly
under foot
(booster
assistance
becomes
effective).

If faulty,

replace
complete

Non-

return
valve
(in
vacuum
hose)

Page
47-62

Functional

check

Page 47-
60

Separating

from brake
pedal

Page 47-
81

Removing

and
installing

Brake booster/brake master cylinder for vehicles with ABS/EDL/ASR/ESP Mark 6...