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Type :
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AIternator
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Specification :
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28V 150A
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Pulley :
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2PK
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Brand :
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nuojin
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Number :
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8SC3238VC 8SC3150VC30
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Quality :
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Remanufacture
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Delivery time :
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10DAY
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The 28V Yuchai generator adapted for Yutong vehicles follows the same general installation logic as standard automotive generators but must align with the characteristics of the 28V high-voltage electrical system. Below is the detailed installation method, and it is recommended to refine the operation in conjunction with the Yutong vehicle maintenance manual:
Tool and Accessory Preparation: Prepare an original 28V Yuchai generator compatible with the specific Yutong model, along with sockets, wrenches, and a special belt tensioner tool of corresponding specifications. If there is rust on the generator terminals or vehicle connection points, additionally prepare sandpaper. Before installation, carefully verify parameters such as the generator’s power and mounting hole positions to ensure full compatibility with the vehicle.
Vehicle Safety Protection: Park the Yutong vehicle on a flat surface, pull the handbrake tightly, turn off the engine, and open the hood. First, disconnect the negative battery cable with a wrench to avoid short circuits in the 28V high-voltage system during operation, which could damage electrical components. If the generator’s installation position is blocked by accessories such as the underbody guard or air intake pipe, remove these parts first. After removal, secure the vehicle with professional stands—never operate with only a jack for support. Finally, clean oil stains, dust, and debris from the installation area to avoid affecting installation accuracy.
Carefully place the 28V Yuchai generator in the original installation position, accurately aligning it with the fixing bolt holes on the generator body. Hand-tighten the fixing bolts for initial positioning—do not fully tighten them to reserve adjustment space for the subsequent installation and tensioning of the drive belt. Handle the generator with care during placement and movement to prevent collisions with the housing, which could damage internal precision components such as coils and rectifiers.
If there is rust or oxide on the terminals, first polish them clean with sandpaper to ensure good electrical conductivity. Locate the generator’s B+ terminal and other signal interfaces, then connect the power cables and signal wires in accordance with the wiring marks on the old generator. Never reverse the positive and negative poles of the 28V system, as this can easily burn out the generator regulator and Yutong vehicle’s electrical modules. Control the torque when tightening terminal nuts, ensure plugs are fully inserted and locked in place, and organize the wiring harness to avoid entanglement or contact with high-temperature components such as the engine exhaust pipe.
Use a special belt tensioner tool to pry the tensioner, compressing its spring, and maintain this state while accurately fitting the drive belt onto the generator pulley. Ensure the belt is fully aligned with the grooves of the engine-side pulley. Slowly release the tensioner to allow the belt to naturally fit into the grooves, then check the belt tension—an appropriate sinkage of 1-2 centimeters when pressed is ideal. An overly loose belt may slip and cause power generation failure, while an overly tight belt will accelerate generator bearing wear and shorten service life.
After confirming the belt tension is correct, fully tighten the generator’s fixing bolts one by one with a socket. The torque must comply with the calibration standards of the corresponding Yutong model to prevent loosening due to vibration during generator operation. Subsequently, reinstall the previously removed accessories (such as the underbody guard and air intake pipe) in the reverse order of removal, tightening all fixing screws to avoid accessory detachment during vehicle operation.
Reconnect and tighten the negative battery cable. After starting the vehicle, observe whether the charging fault light on the instrument panel turns off. Use a multimeter to test the generator’s output voltage and confirm it falls within the standard range for the 28V system. At the same time, pay attention to any abnormal noises around the generator during engine operation. If sounds such as belt slipping or metal friction occur, shut down the engine immediately to inspect issues such as belt tension or the generator’s installation position. The installation is only complete after confirming no abnormalities.
The 28V Yuchai generator adapted for Yutong vehicles requires balancing the characteristics of high-voltage electrical systems, vehicle compatibility, and mechanical assembly specifications. Below are key precautions organized around core dimensions: safe operation, component assembly, electrical connection, and post-installation commissioning. Details are as follows:
Complete Power Off to Prevent Short Circuits: Park the vehicle on a flat road and fully engage the handbrake before installation. Must disconnect the vehicle’s negative battery cable with a wrench. The 28V system has a higher voltage than the conventional 12V system, so live operation carries an extremely high risk of short circuits—easily burning out the generator regulator and Yutong’s electrical modules. Maintain a power-off state throughout the entire wiring process.
Verify Component Compatibility: Confirm the new generator is an original or compliant Yuchai model adapted for the corresponding Yutong vehicle. Focus on verifying parameters such as power, mounting hole positions, and pulley specifications to avoid installation difficulties or operational failures caused by mismatched dimensions or performance. Simultaneously, check that the generator has no external collisions, no internal abnormal noises, and all accessories are complete and intact.
Prepare Compatible Tools: Equip with wrenches, sockets, and a special belt tensioner tool of corresponding specifications. If terminals are rusted, additionally prepare sandpaper. Using tools of incorrect specifications may cause bolt stripping or component damage, affecting installation stability.
References：
Here is the English translation of the text, with accurate rendering of professional terms and consistent sentence logic to meet technical text translation standards:
You may be referring to the source of the previous content regarding the installation methods and precautions for the 28V generator matched by Yuchai for Yutong vehicles. Such content is not derived from a single exclusive official document of Yuchai or Yutong, but is compiled by integrating various reference materials, including the general installation specifications for automotive generators and the installation experience of Yuchai-related power generation equipment. The specific reference bases are as follows:
Installation process data of Yuchai-related power generation equipment: The content about the installation of Yuchai generator sets released on platforms such as NetEase and Sohu can serve as the basic reference. For instance, the requirements mentioned therein—such as inspecting the integrity of components before installation, ensuring firm connections without leakage during installation, and conducting proper grounding and lightning protection—align with the basic safety logic for installing 28V automotive generators. The only difference is that automotive generators do not require installation steps unique to generator sets, such as those related to exhaust pipes and fuel pipelines.
General installation specifications for automotive generators: The general installation procedures for automotive generators summarized on professional automotive platforms like Autohome and PCauto are among the core reference bases. Key steps such as disconnecting the negative terminal of the storage battery to prevent short circuits prior to installation, adjusting the belt tension after initially securing the generator, and connecting wires in accordance with the original circuit layout are equally applicable to the 28V Yuchai generator for Yutong vehicles. However, the 28V model requires additional attention to high-voltage adaptation details, such as preventing reverse connection of the positive and negative poles in the high-voltage circuit.
Common-sense documents on detailed installation of automotive generators: Articles on precautions for motor installation published on platforms like Shadafang have supplemented the detailed bases for mechanical assembly and circuit connection. For example, the contents mentioned in these articles—such as adjusting the belt tension to an appropriate level, maintaining a safe distance between the generator and high-temperature components, and ensuring secure wiring terminals to prevent overheating—are consistent with the special protection requirements for installing 28V high-voltage generators on vehicles, and can serve as references for specific operational details.
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