Brake-3
Troubleshooting (continued)
failure caus e Inspection content
The brake generates the
crack clatter during
operation. (drum brake)
The brake shoe is blocked in the rear apron flange
The rear apron flange is worn
The brake shoe pull-out piece spring is loose or lost
The fixed bolt of rear apron is loose (disc brake )
Brake block support plate is loose or lost
Installation bolt is loose
Filled with lubricated oil
Replace the lubricant flange
Replace
tighten
replace
tighten
It has the rustle or rattler
when use the brake The brake shoe gasket or brake block is worn
The brake caliper and wheel or rotor are disturbed
mutually
The dustproof cover and rotor, rear apron and brake
drum are disturbed mutually
Failure of other brake system component
Tyre generates the abrasion with the tyre and chassis Replace, if the scratch is heavy,
then fine machine the brake drum or
rotor again
Replace it according to requirement
Correct or replace
Repair or replace it according to
requirement
Check or maintain
It has the squeak, continuous
scream, rattler or vibration
noise when use the brake .
Caution: The abrasion
material in the brake will
generate the inherent noise
and heat during the
abrasion, then emit the
heat. So it is normal that
generate the squeak by
accident. The condition
will be serious in extreme
environment, such as cold,
hot, high humidity,
snowing, saliferous and
mud. The accident squeak
will not cause the fatal
failure of the brake, and
will not reduce the effective
performance of the brake. The brake drum and brake shoe gasket, rotor and
brake block is worn or scratched.
The brake pad or block is dirty, with oil or smoothed.
The brake pedal or assistor push bar is adjusted
incorrectly
(dis c brake )
The brake block silencing plate is lost or damaged.
The abrasion of the brake block makes the brake
block abrasion indication plate contacts the rotor
The brake ca lip er has burr or is corrosive
(drum brake)
The pull-out piece spring of brake shoe is soft,
damaged or improper. The pull-out piece spring pin
and spring of brake shoe is loose or damaged; and
rear apron flange has crack Check, repair or replace
clean or replace
check, replace
check and adjust
replace
replace
clean or remove the flash
check, repair or replace
Brake-4
failure caus e Inspection content
It has the continuous
scream and squeak
when does not us e the
brake The brake pedal or assist push bar is adjusted
incorrectly
The return of brake assist or master pump or wheel
pump is bad
(dis c brake )
T he piston is corr osive or blocked
T he brake block in brake calip er is in improp er
position
Shell abrasion of rotor and brake caliper
The brake block support plate in disc brake is
installed improperly
The brake block abrasion indication plate contacts
the rotor for the abrasion of brake block
(drum brake)
The press spring of brake shoe is soft, damaged or
improper.
The flange of rear back rear apron is cracked
T he rear apron interfer e with the brake drum
mutually after bent or warp
Improper machining of brake drum , caus e the mutual
interference of rear apron and brake shoe
components of other brake s ystem :
Brake system has loose or redundant components
T he brake pad is smoothed for the rear brake drum is
adjusted too tight
The wheel bearing is worn damaged or under
lubricated Check and adjust
Check, repair or replace
Check and fill with lubrication oil if
necessary.
Repair or replacement
Repair or replacement
Repair or replacement
Repair
Repair
Repair or replacement
Repair or replacement
Replace the brake drum
Check, maintain and replace if
necessary.
It still has the rattler,
click or cackle noise
when does not us e the
brake. The stone or foreign enters into the inside of wheel
protecting hood
The hub nut is loose
The brake pedal or assistor push bar is adjusted
improperly
The wheel bearing is worn, damaged or lubricated
insufficiently
(dis c brake )
T he muffler spring is soft or lost; the brake block
support plate or external end of brake block is coiled
silencing plate is unsound
T he slide bush is worn
T he installation bolt is loos e
Piston returns unsoundly
(drum brake)
Have loose or redundant component Remove the foreign materials such as
the stone
Tighten it to the specified torque, it
should be replaced if the bolt hole is
enlarged
Check and adjust
Check, lubricate or replace
Repair or replacement
Check and replace if necessary
Check and replace if necessary
Check and tighten if necessary
Check , repair or replace
Check, take out or repair
