Hyundai HL630VL Operator's Manual page 149

BRAKING SYSTEM
Characteristics of faults
F o o t b r a k i n g f o r c e n o t
adequate
Gear not engaged
Brake can`t opened normally
P r e s s u r e i n a i r r e s e r v o i r
quickly decreases (drops
m o r e t h a n 0 . 1 M P a i n 3
minutes)
P r e s s u r e i n d i c a t e d b y
barometer rises slowly
Emergency or parking braking
force inadequate
6-2 Troubles Shooting
Cause
Air in braking hydraulic pipeline
Oil leakage in clamp
Brake air pressure low
Seals for brake pump worn
The hub is leaking, and the oil is
leaked onto the brake pad
Brake pad worn to the limit
Brake valve fault
Brake valve fault
Brake pump not act normally
Slave pump piston can not return
Intake valve of the brake valve
blocked by dirt or damaged
Pipe joint loose or pipeline ruptured
pipe joint loose
Air compressor works abnormally
Intake valve of the brake valve or
drum membrane not sealed
Clearance between brake drum and
brake pad too large
Oil on the brake pad
Remedy
Exhaust air from the pipeline
Replace seals on the clamp
Check tightness of air compressor,
combo valve, air reservoir and pipeline
Replace seals
Check or replace hub oil seal
Replace brake pad
Check brake valve
Check brake valve
Check brake pump
Check or replace rectangular coil
Perform several times of braking to
blow off the dirt or replace brake valve
Tighten joint or replace pipe
Tighten joint
Check working conditions of air
compressor
Check or replace brake valve
RE-adjust according to the operation
requirements or replace brake pad
Clean brake pad