5 Series E34 525td (M51) TOUR
Fault
Cause
Remedy
Poor braking effect in spite of great
force on pedal
Brake-pedal travel normal
Brake pads oil-splattered or burnt;
wrong type of brake pads
Replace brake linings
Poor braking effect in spite of great
force on pedal
Brake-pedal travel short
Brake booster malfunctions - engine
vacuum
Check brake booster system
- Check engine (valves, cylinder
head gasket etc.)
Poor braking effect in spite of great
force on pedal
Brake-pedal travel long
One brake circuit failed due to leaks
or damage
Leakage test of brake system
Brake pedal can be pressed down
softly and springily
a)
Air in braking system
b)
Insufficient brake fluid in
expansion tank - refer to a)
c)
Overheated brake fluid - vapour
lock due to excessive water
content in brake fluid or
excessive brake loads
a)
Top up or change brake fluid
Bleed brakes
b)
Top up or change brake fluid
Bleed brakes
c)
Top up or change brake fluid
Bleed brakes
Brake is bled and readjusted, but
brake pedal can be pressed down
too far
a)
Primary cup in master cylinder
damaged
b)
Separating cups on floating
piston of tandem-brake master
cylinder leak
c)
Leak in braking system
a)
Overhaul or replace brake
master cylinder
b)
Overhaul or replace brake
master cylinder
c)
Leakage test of brake system
Fault
Cause
Remedy
Uneven pad wear
a)
Wrong type of pads/liners
b)
Dirty fist caliper recesses,
damaged caps
c)
Corrosion in floating calipers or
wheel cylinders
d)
Swollen rubber ring for piston
control
a)
Replace brake linings
b)
Remove and install, repair or
replace floating calipers or
wheel cylinders
c)
Remove and install, repair or
replace floating calipers or
wheel cylinders
d)
Remove and install, repair or
replace floating calipers or
wheel cylinders
Brake pads worn at angle
a)
Wheel-bearing play excessive
b)
Brake disc not aligned with fist
caliper
c)
Corrosion in floating calipers or
wheel cylinders
RA Troubleshooting the brake system
BMW AG - TIS
23.01.2013 07:49
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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