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6-2 Troubles Shooting
Characteristics of faults
Cause
Remedy
F o o t b r a k i n g f o r c e n o t
adequate
Air in braking hydraulic pipeline
Exhaust air from the pipeline
Oil leakage in clamp
Replace seals on the clamp
Brake air pressure low
Check tightness of air compressor,
combo valve, air reservoir and pipeline
Seals for brake pump worn
Replace seals
The hub is leaking, and the oil is
leaked onto the brake pad
Check or replace hub oil seal
Brake pad worn to the limit
Replace brake pad
Gear not engaged
Brake valve fault
Check brake valve
Brake can`t opened normally
Brake valve fault
Check brake valve
Brake pump not act normally
Check brake pump
Slave pump piston can not return
Check or replace rectangular coil
Pressure in air reservoir
quickly decreases (drops
m o r e t h a n 0 . 1 M P a i n 3
minutes)
Intake valve of the brake valve
blocked by dirt or damaged
Perform several times of braking to
blow off the dirt or replace brake valve
Pipe joint loose or pipeline ruptured
Tighten joint or replace pipe
P r e s s u r e i n d i c a t e d b y
barometer rises slowly
pipe joint loose
Tighten joint
Air compressor works abnormally
Check working conditions of air
compressor
Intake valve of the brake valve or
drum membrane not sealed
Check or replace brake valve
Emergency or parking braking
force inadequate
Clearance between brake drum and
brake pad too large
RE-adjust according to the operation
requirements or replace brake pad
Oil on the brake pad
Clean brake pad
BRAKING SYSTEM
Summary of Contents for HL630VL
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Page 61: ...2 10 Operation Controls Schematic Fig 11 ...
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Page 126: ...Inspection Maintenance and Adjustment 4 7 LUBRICATION OIL AND MAINTENANCE CHART Figure 4 ...
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