Golden Dragon XML6125CLE, Repair Manual

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BR-20 Brake System BR-6125J93C-01
‹ Adjusting procedure
1) Test device diagram
气源 Air supply 行车位置
Driving position
2) Tightness test
Set the lever at the parking position, open the switch 1, charge air via the port 11 to 800kPa and maintain the
pressure for five minutes. Inspect the assembly, especially the exhaust
port 3, a slight air leakage is allowed.
3)
Performance test
a) In manipulating the control lever, when a=10°, P2 pressure must be
reduced to 550~ 620kPa;
and when a=73°, P2 pressure must be reduced to zero;
b) The lever should return to the driving position when released and at
this time, P1=P2=800kPa.
c) Reset the lever at the driving position. Before taking off the
assembly, exhaust the assembly to a pressure of 0kPa.
d) Make sure the air pressure conforms to the characteristic curve in the Figure.
止推角
Thrust angle
停车制动锁止位置
Parking brake lock position
特性曲线
Characteristic curve
手柄转角
Lever turning angle
5. Quick release valve
‹ Precautions for use and maintenance
1)
When any air leakage is found, check if the diaphragm is damaged.
2) In making a second class maintenance, the quick release valve should be dismantled, cleaned and inspected.
6. Relay valve
‹ Precautions for use and maintenance
1)
When the relay valve is found with air leakage, remove and check all seal rings for wear, check intake and
exhaust valves for damage or dirt on surface, and check the valve stem
for roughness that may lead to a failed sealing with its guide sleeve. If
so, replace the damaged parts.
2) When the vehicle has run for 48000 km (the third class maintenance),
the valve should be dismantled and cleaned by a professional
technician.
7. Air brake chamber for front wheel
‹ Important instructions on use and maintenance
1)
The air brake chamber is an important safety device and its dismantling and assembling require special tools
and skills. It is recommended to replace the assembly in stead of dismantling and maintenance;
2) In its dismantling and assembling, safety protection should be well considered to avoid any injures.
1 Switch pressure gauge
(above grade 0.4)
2, 4 Pressure gauges (above
grade 0.4)
3, 5 Air reservoir
8 Test piece
8-20