AUDI A4 1999 B5 / 1.G Engine Oil Level Checking Repair Manual

51

Brake pad thickness, checking


Inspection service:

Dimension -a- = pad thickness including backing plate. Wear limit = 7 mm
(0.28 in.).
Thoroughly remove all dirt from wheels.
If pad thickness including backing plate is 7 mm (0.28 in.) or less the
brake pads have reached or exceeded wear limit and must be replaced. - Determine thickness of outer and inner pads by inspecting visually.
View through opening in wheel. Use a flashlight and mirror if necessary.
- Tighten wheel bolts to 110 Nm (81 ft lb).
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Brake system - visual inspection


WARNING!

Any defects found must be repaired.

- Inspect brake master cylinder, vacuum brake
booster, hydraulic unit, brake pressure regulator,
and brake calipers for leaks and damage.

- Brake hoses must not be twisted.

- Brake hoses must not make contact with any
part of vehicle when steering is at full lock.

- Inspect brake hoses for porosity and
deterioration, brake hoses and brake lines for
chafing.

- Inspect the brake connections and attachments
for correct seating, leaks and corrosion.
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53

Brake fluid level, checking


WARNING!

Use only new brake fluid confomning to US
Standard FMVSS 116 DOT 4. Genuine VW,
Audi brake fluid conforms to this
specification.
Brake fluid is poisonous. Do not ingest brake
fluid. Wash thoroughly with soap and water if
brake fluid comes into contact with the skin.

CAUTION!
Do not let brake fluid come into contact with
paint because of its caustic effect
Brake fluid absorbs moisture from
surrounding air and should always be stored
in airtight containers.

Delivery inspection:
Brake fluid level must be at max. marking at time
of delivery.

Note:
To avoid brake fluid over flowing do not exceed
the max. marking.
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Inspection service:

- Always consider brake pad wear when checking
brake fluid level. When driving, a slight drop in
brake fluid level results from normal wear and
automatic adjustment of brake pads.

- If brake fluid level is at minimum marking or
slightly above, brake pads are close to wear
limit, it is not necessary to add fluid.

- If brake pads are new or well away from wear
limit, brake fluid level must be between min. and
max. markings.

- If brake fluid level has dropped below min.
marking, check brake system before adding
brake fluid.
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55

Brake fluid, changing


WARNING!

Use only new brake fluid conforming to US
Standard FMVSS 116 DOT 4. Genuine VW,
Audi brake fluid conforms to this
specification.
Brake fluid is poisonous. Do not ingest brake
fluid. Wash thoroughly with soap and water if
brake fluid comes into contact with the skin.

CAUTION!
Do not let brake fluid come into contact with
paint because of its caustic effect
Brake fluid absorbs moisture from
surrounding air and should a/ways be stored
in airtight containers.
Do not allow brake fluid to come into contact
with fluids containing mineral oils or
gasoline cleaning products.
Mineral oils damage plugs and seals of the
brake system.
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56


CAUTION!
Note:
Please observe waste disposal requirements. - Connect Brake Bleeder US 1116 to brake fluid reservoir. Use adapter -
1-, plastic fitting VAG 1238 B/2, seal -3-, and connector -4-.
- Use a suction bottle to draw off as much brake fluid as possible.
Do not use cleaning cloths that have been contaminated by
mineral oils for cleaning brake filling and bleeder fittings. Do not re-use extracted brake fluid.
- Install and adjust brake pedal depressor between driver's seat and
brake pedal.
- Open bleeder fittings and pump in fresh fluid forcing out appropriate
amount of used brake fluid.
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Sequence:
Brake calipers Brake fluid quantity which
must flow out of brake
calipers:
rear right approx. 0.3 liters (0.32 qt)
rear left approx. 0.3 liters (0.32 qt)
front right approx. 0.2 liters (0.21 qt)
front left approx. 0.2 liters (0.21 qt)
Total quantity: 1 liter (1.06 qt)

- Disconnect Brake Bleeder US 1116 from brake
fluid reservoir and remove brake pedal
depressor.

- Check pedal pressure and free travel at brake
pedal.


Max. free travel: 1/3 of pedal travel.
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58

Transport locks, removing

On certain vehicle versions, blocking elements -
1- (in a luminous color) are installed in the front
suspension struts. These models are
recognizable by a tag on the mirror.

- Relieve pressure on coil spring (e.g. vehicle on
lift).

Note:
It is not necessary to remove wheels.

- Pull auxiliary spring -2- down.
- Remove 2 blocking eiements -1- fitted to each suspension strut.
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59

Undercoating - visual inspection for
damage

When performing visual inspection, pay attention
to underbody, wheel wells, and rocker panels.
Any damage or defects found must be repaired.
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60

Lock cylinders, lubricating


- Lubricate with lock cylinder lubricant spray G
000 400 01.
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