1997 VOLKSWAGEN PASSAT brake fluid

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Note:
Care is to be exercised to ensure the seal is not
damaged when lifting the dust boot (only use a blunt
instrument, e.g. plastic wedge). Fig. 1 Wheel cylinder, checking for leaks - Lift dust boot - If brake fluid is found in the dust boot then replace
wheel cylinder Page 4 of 8Rear wheel brakes, servicing12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.46.4

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Installing

Note:
Before pressing the piston back, remove some
brake fluid from the reservoir. Use a bleeder
bottle or a plastic bottle which is only used for
brake fluid. Brake fluid is poisonous and must not
be siphoned by mouth through a hose. Note: - Thread in piston by turning knurled wheel of
special tool 3272 clockwise.
- Install brake pads. Install special tool 3272 so that the collar (arrow)
of the tool is seated against the brake caliper. If the piston is difficult to move, use a 13 mm
open end wrench on the flats (arrow A) provided
for this purpose. If the piston is pushed back with a piston resetting
tool or by operating the foot brake, the automatic
adjustment in the brake caliper will be destroyed. Page 8 of 10Rear wheel brakes, servicing (disc brakes)12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.46.5

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- Secure brake caliper housing with new self-
locking bolts. Note: - Attach parking brake cable (arrow) to brake caliper housing. After each brake pad change firmly depress brake
pedal several times with vehicle stationary, so
that the brake pads are properly seated in their
normal operating position. After changing brake pads check brake fluid level. Page 9 of 10Rear wheel brakes, servicing (disc brakes)12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.46.5

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7 - Sealing ring Always replace 8 - Self-locking hex nut, 20 Nm (15 ft lb)
9 - Brake master cylinder Cannot be repaired. If
faulty, replace
complete.
10 - Sealing plug Moisten with brake
fluid and press into
reservoir
11 - Seal Page 3 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

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12 - Cap
13 - Brake fluid reservoir
14 - Non-return valve Page 4 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

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Rear brake caliper,
servicing
Note: Apply thin coat of brake
cylinder paste to brake
cylinder pistons and seal. When repairing install all
parts supplied in repair kit. New brake calipers are
filled with brake fluid and
are pre-bled. When repairing it is
essential to pre-bleed the
brake calipers (without
brake pads) before
installing in the vehicle
Page 47-21 1 - Self-locking bolts, 35
Nm (26 ft lb) Always replace When loosening and
tightening counter-hold on guide pin Page 1 of 8Rear brake caliper, servicing12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.4

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Pre-bleeding brake caliper Note:
Position brake caliper as illustrated to pre-bleed. - Open bleeder valve and using a standard bleeder
bottle, fill with brake fluid until bubble-free brake
fluid flows from the threaded hole (brake hose
connection). Close bleeder screw. Page 8 of 8Rear brake caliper, servicing12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.4

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Brake system, bleeding

Brake system, bleeding (vehicles with
and without ABS, ABS/EDL)

Changing brake fluid
Repair Manual, Maintenance
Note:
Bleeding the brake system on vehicles with
ABS, ABS/EDL is performed as for vehicles
with conventional braking systems.
Only use new brake fluid conforming to US
standard FMVSS 116 DOT 4.
Genuine VW/Audi brake fluid conforms to this
specification.
Brake fluid is poisonous. Also due to its
corrosive effect brake fluid must not come into
contact with paintwork.
Brake fluid is hygroscopic, which means it
absorbs moisture from the ambient air and
should always be stored in air tight containers.
Rinse off spillages using plenty of water. Repair Manual, Brake System On Board Diagnostic (OBD), Repair Group 01 Page 1 of 3Brake system, bleeding12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.6