Natural Gas & Wellhead Gas Fuel System
The fuel first passes the fuel shut off when the engine starts cranking. Then it goes through the DEPR and
comes into the mixer to be mixed with the air from the air filter as shown in Figure 11
Weichai WP06GNA are capable of running the NG or wellhead gas with energy content from 700 to
1800 BTU per cubic foot. Weichai recommends fuel analysis for any gas other than pipeline quality NG
from customers to make sure the engine fuel and control system are calibrated to run the fuel.
Figure 11 Natural Gas/Wellhead Gas Fuel System
3.8 Exhaust System
Pre-catalyst Oxygen Sensor
Apply an adequate amount of anti-seize compound to the threads of the oxygen sensor and install the
sensor in the O2 sensor port located on the exhaust manifold elbow pipe. Tighten the sensor to the
specified torque 29.5ft-lb ~44 ft-lb (40 Nm~60 Nm). Anti-seize on thread only, don’t put on the sensor.
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