Downloaded from www.Manualslib.com manuals search engine 45-27
Installing
Note: When installing new circlip ensure opening is
uppermost - installation position (arrow).
- Install new sealing ring to sensor. (Coat sealing
ring with lubricant e.g. soft soap). Note: - Sensor notch must point downward when inserting
into brake servo and be heard to engage.
- Connect sensor unit connection and ensure
correctly located. To ensure correctly seated pull senor by hand. Leaks at the sensor sealing ring, result in
insufficient braking vacuum and poor engine
idling. For ease of illustration, shows installing the
sensor with brake fluid reservoir removed. Page 10 of 10Assembly overview - hydraulic unit, brake servo/brake master cylinder12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.4
Downloaded from www.Manualslib.com manuals search engine 47-2
6 - Brake servo On gas engines the
vacuum required is
taken from the intake
manifold. On Diesel engines an
exhauster is installed
to create the required
vacuum. Functional check - With engine
switched off,
depress brake pedal
firmly several times
(to exhaust the
vacuum in the unit).
- Now depress brake
pedal with average
foot pressure, hold
and start engine. If
the servo unit is working properly, the pedal will be felt to
give slightly under
foot (servo
assistance becomes
effective). If faulty replace
complete. Check valve (item 14 )
is in vacuum hose Functional check - It must be possible
to blow through in
direction of arrow.
- Blowing against the arrow the valve must seat. Page 2 of 4Assembly overview: brake master cylinder/brake servo12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.1
