Generator alternator 24V 150A 2470900 2448165 0518064 1442788 063535550080 FOR SCANIA BUS TRUCK
Applicable models:SCANIA BUS TRUCK
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Reference part number:2470900 2448165 0518064 1442788 063535550080 2853479 2905972
Product Attributes
| Rated output : | 24V 150A |
| Pulley : | 10PK |
| Size : | 35*31*26 single unit inner box |
| Weight : | net weight：10KG gross weight：11.05KG |
| Packaging : | Neutral kraft paper packaging |
| Spot/Pre sale : | Spot goods |
| Warranty : | 1 year |
| Product number : |
Product Details
| Type : | ACgenerator Alternator |
| Specification : | 24V 150A |
| Pulley : | 10PK |
| Brand : | nuojin |
| Number : | 2470900 |
| Quality : | NEW |
| Delivery time : | 10 day |
The installation of 24V generators on Scania buses and trucks must comply with heavy-duty vehicle-specific installation standards, balancing the stability of mechanical mounting and the safety of 24V electrical systems. The following are detailed installation procedures tailored to these models, together with key precautions specific to the brand.
Pre-installation Preparation
Tools and Accessories
Prepare tools including socket wrenches, torque wrenches, belt tensioner tools, multimeters, insulating tape and heat-shrink tubing. Use only genuine Scania or compatible 24V generators, and verify that the generator power rating and pulley dimensions match the original equipment. Prepare a compatible drive belt, new gaskets, mounting bolts and sealant as required.
Safety Preparations
Park the vehicle on level ground and apply the parking brake. Turn off the engine and allow it to cool completely to prevent scalding. Disconnect the negative terminals of the vehicle’s 24V battery pack — Scania models typically use two 12V batteries connected in series — to avoid short circuits that could damage the ECU and other precision components. Take photos to record the original generator wiring connectors, mounting bracket positions and belt routing for reference during reassembly.
Removal of the Old Generator
Drive Belt Removal
Locate the belt tensioner. Use a special tool to depress the tensioner and release belt tension, then remove the drive belt. Mark the belt routing to prevent incorrect installation. If the belt shows signs of wear or cracking, replacement is recommended at the same time.
Electrical Disconnection
First unplug the generator control signal wiring harness connector. Then loosen the mounting bolt on the generator’s B+ terminal and remove the main power cable. Wrap the main cable connector tightly with insulating tape to prevent short circuits from contact with metallic body components.
Generator Removal
Loosen and remove the bolts securing the generator to the bracket in sequence. On some models, it may be necessary to remove surrounding components such as intake pipes and protective covers to create sufficient working space, after which the old generator can be carefully removed.
Installation of the New 24V Generator
Generator Mounting and Securing
Clean oil, dirt and debris from the mounting bracket. Place the new generator in position and align it with the bracket bolt holes. Thread the mounting bolts by hand without fully tightening them. Adjust the generator position to ensure its pulley is coplanar with the crankshaft pulley, air conditioning compressor pulley and other driven pulleys, avoiding eccentric belt wear. Then use a torque wrench to tighten the mounting bolts to Scania’s factory-specified torque — generally 25–35 N·m for heavy-duty models, with exact values referenced to the corresponding vehicle service manual.
Drive Belt Installation
Route the belt around each pulley in accordance with the previously marked path. Operate the tensioner to tension the belt, then release the tensioner and check belt tension. Press the middle section of the belt with moderate force; a deflection of 5–10 mm is recommended. Excessive tension will damage bearings, while insufficient tension easily causes slipping.
Electrical Wiring Connection
First insert the control signal wiring harness connector into the corresponding port until an audible click confirms it is securely locked. Then connect the main power cable to the B+ terminal: clean oxidation from the terminal, tighten the mounting bolt, and refit the insulating protective sleeve. Reinforce insulation with heat-shrink tubing if necessary. Route the wiring harness away from high-temperature components such as exhaust pipes and moving parts, and secure it neatly with cable ties.
Commissioning and Acceptance
Initial Power-on Check
Reconnect the negative terminals of the battery pack. Turn on the ignition switch without starting the engine, and observe whether the charging warning light on the dashboard illuminates, which confirms that the excitation circuit is functioning properly.
Post-start Testing
Start the engine and let it idle. Under normal conditions, the charging warning light should turn off. Measure the voltage at the battery terminals using a multimeter. The normal charging voltage for a 24V system is 27–29.4V. Raise the engine speed to approximately 2000 rpm and check that the voltage remains stable.
Operating Condition Verification
During operation, listen for abnormal noise from the generator, and check that the belt is free from slipping and misalignment and that wiring connectors show no signs of overheating. If the warning light remains illuminated or voltage abnormalities occur, shut off the engine immediately and troubleshoot the wiring connections or the generator itself.
The following are the core precautions for the removal, installation, commissioning and long-term use of 24V generators on Scania buses and trucks. They are sorted by safety priority, with key points marked in bold, and adapted to the characteristics of heavy-duty 24V electrical systems and Scania vehicle design standards.
I. Absolute Safety Requirements (Top Priority – Prevent Equipment Burnout and Personal Injury)
24V System Power Disconnection Procedure (Mandatory)
Scania vehicles use two 12V batteries connected in series for power supply. Before disassembly and installation, you must disconnect the negative terminals of both battery groups at the same time (or turn off the main power switch). Live operation on wiring harnesses or terminals is strictly prohibited.If the uninsulated B+ main power connector touches the vehicle body metal without power disconnection, an instantaneous short circuit will occur, burning out the ECU, generator rectifier bridge and all vehicle fuses, and even causing open flames. During the entire operation, the unconnected B+ terminal must be wrapped with insulating tape, and exposed grounding is forbidden.
Reverse Polarity Is Strictly Prohibited (Fatal Risk for 24V Systems)
The electrical system of Scania vehicles is far more sensitive to polarity than passenger cars. When connecting the battery or generator wiring harness, the positive and negative poles must be strictly distinguished:
The generator B+ terminal (thick red cable) shall only be connected to the main positive power cable of the battery pack.
The pin definition of the control plug must fully match the original vehicle; cross‑connection and reverse wiring are not allowed.
Reverse polarity will instantly burn out the generator’s built‑in diodes, voltage regulator, body control module (BCM) and engine ECU, resulting in extremely high maintenance costs (core electrical components for heavy‑duty trucks usually cost more than 10,000 RMB each).
No Electrical or Mechanical Operations While the Engine Is Running
Once the engine is started, never remove the generator wiring harness, terminals or drive belt:
Disconnecting the B+ main cable will generate a high‑voltage back EMF unique to 24V systems, which breaks down the rectifier bridge and voltage regulator, resulting in complete generator failure.
Touching rotating pulleys or belts can easily cause entanglement injuries. The high tension of heavy‑duty truck belts makes the consequences even more severe.
High‑Voltage Protection and Environmental Safety
Wear insulated gloves, safety goggles and heat‑resistant gloves during operation:
The short‑circuit current of a 24V system is much higher. Insulated gloves must meet high‑voltage electrical operation standards (withstand voltage ≥ 500V).
The engine exhaust system can reach temperatures above 300°C. Avoid dragging wiring harnesses or placing flammable materials (such as insulating tape, rags) near high‑temperature components.
References：
- You did not specify the exact text for which you were requesting source information earlier. Based on context, it is highly likely that you are referring to the source of content related to the 24V generator installation and precautions for Scania buses and trucks. The core authoritative sources for this content are primarily official technical manuals published by Scania, supplemented by industry‑wide general standards. The details are as follows:
Official Scania Engine Series Service Manuals
- This is the primary authoritative source for all installation‑related content. Examples include the Scania DC09 Installation Manual available on ManualsLib and the Scania OC16, DC16, DC13, DC09 Service Manual from Manualmachine. These documents not only cover electrical installation requirements such as the 24V system being composed of two 12V batteries connected in series, but also specify detailed mechanical installation criteria including shaft alignment standards, pulley selection, and bracket adjustment. They also include essential precautions related to service space clearance and bearing lubrication. As such, they serve as the core reference for generator installation on corresponding Scania truck and bus models.
Official Scania Generator Set Operation Manuals
- Examples include the Portuguese‑language Manual de instruções Scania Grupo gerador on docplayer and the English operation manuals for Scania generator sets published by greenpowersolutions. While these manuals focus on the overall operation and maintenance of generator sets, they also cover critical topics such as the 24V battery system, post‑installation commissioning and inspection, and qualifications required for installation personnel. They explicitly state that installation and commissioning must be performed by professionally trained staff, and that the completed installation requires inspection and approval by Scania or its authorized institutions. These provisions constitute important supporting specifications for the generator installation process and serve as authoritative references for safety and operational precautions.
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