Operation and Maintenance Procedures of Weichai Gas Generators
Before operating a natural gas engine, the operator must read this operation and maintenance manual carefully and follow the operation and maintenance procedures specified in this manual in a strict way.
● This natural gas engine has undergone factory inspection according to the test specifications in a strict way. Do not adjust any ECU data or increase the power of natural gas engine arbitrarily; otherwise, all warranty commitments of our company will become invalid.
● As engine control module (ECU) is a precision component, the user shall not disassemble it; otherwise, all warranty commitments of our company will become invalid.
● As rotor shaft of turbocharger is a precision high-speed rotating component, disassembling or collision is strictly prohibited; otherwise, all warranty commitments of our company will become invalid.
● As there are strict requirements for torque and angle of rotation of main bearing bolt and connecting rod bolt of a natural gas engine, the user shall not unscrew or disassemble the bolts. As connecting rod bolts are disposable, they shall not be reused; otherwise, all warranty commitments of our company will become invalid.
● The grade of engine oil added into a natural gas engine must meet the provisions of this operation and maintenance manual. We suggest using the special oil for Weichai natural gas engine and special oil filter for filtering. The operator must check whether the amounts of coolant and engine oil in an engine meet the requirements before starting the engine every time.
● For bad air source, banning engine working without gas filter, otherwise the service life of engine will be shortened.
● When the calorific value of gas composition is lower than 49 MJ/kg, the power of engine would relatively decrease.
● Operating a natural gas engine without an air filter is strictly prohibited.
● Do not put a new engine into operation before it is run in necessarily. A new engine shall be put into trial operation for 50 hours before it is used normally.
● The new spark plug tightening torque must be as specified and the ceramic body must be cleaned up when changing the spark plug every time.
Green Power International Weichai
● The power supply and earth connection of a natural gas engine electronic control system shall be disconnected before welding any component of a generator set.
● If the working environment temperature may be lower than 0℃ after shutdown but there is no antifreeze additive in coolant, the coolant in water tank and engine shall be drained off.
● In order to avoid corrosion, each ex-works engine is oil-sealed. Usually the service life of an engine oil seal is one year. After one year, the operator shall che and take necessary remedial measures.
● Before using a new set, the operator shall check the natural gas line, the natural gas feeder and the electrical system, and pay special attention to the electrical connection for “looseness” and the high-voltage line for “virtual connection”.
● The operator shall make sure that the battery voltage is normal and there is sufficient voltage for the normal operation of ignition and electronic control system of natural gas engine before starting the engine. If the engine has not been started up for 3 times successively, the natural gas part and the circuit part shall be rechecked carefully.
● The cooling water used in the engine must be soft water. [If ordinary water (hard water) is used as the coolant of the engine, it is likely to develop scale in pressure reducer and the “frosting” phenomenon when the engine is just started up.