Common trouble and elimination
C-23
Breakdown
type
Breakdown reason distinguish method
Disposal way
Charging valve
leaking gas
a. Valve core rubber ring invalidate;
a. Replace charging valve or
report for repair to Lantianda
Pressure gauge
leaking oil
a. Surface airtight invalidate ( lever lower
than 1/3 should replace pressure gauge);
a. Replace or report for repair
to Lantianda
After refilling
for 12 hours,
pressure gauge
display
decreased
about
2~4Mpa
a. When vehicle is on the process of gas
refilling, because CNG gas molecule have
high speed rub and bump caused heat, gas
temperature rise, pressure also rise, at this
time pressure gauge is 20mpa. When gas
cooling to the normal temperature, pressure
gauge pointer decrease about 2 to 4 mpa, it is
caused by CNG gas cylinder and pipe road
system’s temperature decrease, it is normal.
Summary of Contents for XMQ6900J series
Page 116: ...Common trouble and elimination C 16 Fault symptom Possible cause Eliminating method speed...
Page 128: ...Appendix A 4 Air braking schematic diagram...
Page 129: ...Appendix A 4 Electric schematic diagram of the complete vehicle 1...
Page 130: ...Appendix A 4 Electric schematic diagram of the complete vehicle 2...
Page 131: ...Appendix A 4 Electric schematic diagram of the complete vehicle 3...
Page 132: ...Appendix A 4 Electric schematic diagram of the complete vehicle 4...
