Advertisement
2-8
GROUP
2-BRAKES
TABLE 2
-(Continued)
DRUM BRAKE TROUBLE SYMPTOMS AND POSSIBLE CAUSES
TROUBLE SYMPTOMS
POSSIBLE CAUSES
EXCESSIVE PEDAL TRAVEL
Leaks or insufficient fluid.
Distorted or improperly adjusted
Lining glazed or worn.
brake shoe.
Air
m
hydraulic system.
Faulty master cylinder.
Cracked drum.
Self adjusters not operating.
PEDAL GRADUALLY GOES
Leaks or insufficient fluid.
Faulty master cylinder.
TO FLOOR
BRAKES UNEVEN
Improper tyre pressure.
Dirty brake fluid.
Oil or
grease
on lining.
SHOE CLICK AFTER RELEASE
Insufficient shoe-to-carrier plate
Threads left by drum turiling tool
lubrication.
pulls shoe sideways.
NOISY OR GRABBING BRAKES
Distorted or improperly adjusted
Lining glazed or worn.
brake shoe.
Oil or grease on lining.
Dirt on drum-lining surface.
Faulty brake cylinder.
Insufficient shoe-to-carrier plate
lubrication.
BRAKES DO NOT APPLY
Leaks or insufficient fluid.
Lining glazed or worn.
Dirty brake fluid.
Oil or grease on lining.
·
Faulty master cylinder.
Air
in hydraulic system.
BRAKES FOR THE RESPECTIVE
One section dual brake system is
SYSTEM DO NOT APPLY
inoperative.
WARNING LIGHT STAYS LIT
. One s.ection dual brake system is
Differential pressure valve not
moperattve.
centred.
Warning lamp switch is grounded.
Wiring to warning lamp switch is
grounded.
PEDAL GRADUALLY MOVES
Leaks or insufficient fluid.
Faulty master cylinder.
TOWARD FLOOR OR DASH
PANEL
WARNING LAMP DOES NOT
Warning lamp is burned
out.
Warning lamp switch
has
an open
LIGHT
Wiring to warning lamp
has
open
circuit.
circuit.
Advertisement
