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Type :
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Starter Motor
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Specification :
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24v，4.5kW
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Number of feet :
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11T
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Brand :
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NUOJIN
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Number :
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23300-Z5578 23300-Z5562
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Quality :
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Remanufacture
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Delivery time :
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30DAY
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Starters with the specification of 24V 4.5kW are mostly suitable for Nissan commercial vehicles or heavy-duty models. Their installation process conforms to general starter installation standards, but must be tailored to the characteristics of this high-power model and the structural features of Nissan vehicles. The specific installation methods and precautions are as follows:
Verify the model of the new starter, confirm that the 24V voltage and 4.5kW power are compatible with the vehicle. Meanwhile, check that the starter has no external damage, the drive gear is free of wear, and all components are complete.
Prepare tools such as suitable socket wrenches, torque wrenches, Phillips/flathead screwdrivers, special cleaning agents, compressed air, jacks and stands, etc. If the starter is installed at the bottom of the vehicle, lift the vehicle stably with a jack and secure it firmly with stands to ensure operational safety.
Disconnect the negative terminal cable of the battery, place the cable away from the battery posts to prevent short circuits caused by accidental contact during operation. Meanwhile, wait for 10-15 minutes to allow residual charges in the circuit to dissipate.
The starter of Nissan models is usually located at the junction of the engine and transmission. After removing the old starter, clean oil stains, dust and rust on the mounting surface with a special cleaning agent or alcohol to ensure the mounting surface is flat and clean. At the same time, inspect the flywheel ring gear for tooth surface wear, cracks and other defects. If any abnormality is found, repair or replace it first to avoid affecting the meshing of the starter gear. In addition, clean impurities on the starter mounting holes and the surface of the fixing bolts to prevent loosening after installation.
Lift the new starter to align it with the mounting holes, adjust the angle to avoid surrounding wire harnesses and pipelines, preventing the wire harnesses from being compressed or rubbing against components after installation. The starter of most Nissan models is fixed with 2-3 bolts. Insert the bolts into the holes one by one, and tighten them gradually with a torque wrench. The recommended torque is 35-50N·m. Do not over-tighten to avoid housing deformation, and do not under-tighten, otherwise the starter will vibrate during operation and affect the stability of use.
First, lift the wire protection cover on the starter to expose the main power terminal and control terminal. Fasten the wire harness to the main power terminal with a nut, with the torque controlled at 6-10N·m as recommended. Plug the connector corresponding to the control terminal firmly to avoid poor contact which may cause abnormal starting of the starter.
If the vehicle is equipped with a wire harness bracket, fix the wire harness with bolts, then install the wire harness clips in place and arrange the wire harnesses to prevent contact with surrounding moving parts.
First, recheck the fixing bolts of the starter and the wiring connections. After confirming everything is correct, reconnect the negative battery cable and ensure it is securely fastened.
Power on and perform a no-load test: observe whether the starter runs smoothly without abnormal noise, and check if the drive gear can extend and retract normally. Then start the engine to test if the starter can drive the engine to start smoothly without jamming or slipping. As this is a high-power starter model, if weak starting occurs, prioritize checking whether the wiring connections are loose or the battery has sufficient power.
If protective components such as the lower guard plate were removed earlier, reinstall them in the reverse order of removal to complete the entire installation process.
For the installation of the Nissan 24V 4.5kW starter, the following precautions must be strictly followed to adapt to its high-power characteristics and the structural requirements of Nissan vehicles, ensuring installation safety and stable equipment operation:
This starter features a 24V high-voltage specification, posing a higher risk of short circuits. Keep the battery's negative terminal disconnected throughout the installation process, and place the cable separately away from the terminals. After disconnection, wait for 10-15 minutes to allow residual charges in the circuit to fully dissipate before proceeding with operations, preventing arc burns or component damage caused by residual voltage.
The torque for the starter fixing bolts should be controlled between 35-50N·m. Refer to the corresponding Nissan vehicle maintenance manual for the exact value (torque varies slightly between commercial and heavy-duty models). Over-tightening may cause deformation of the flywheel housing or starter casing, while under-tightening can lead to operational vibration, abnormal noise, or even bolt detachment.
The torque for the main power terminal nut is 6-10N·m. Use a torque wrench for operation to avoid terminal overheating and poor contact, which could result in weak starting under high-power operating conditions.
During the no-load test, the single operation time must not exceed 5 seconds, and the interval between two tests should be more than 2 minutes. The 4.5kW high-power starter’s coil generates heat more rapidly; prolonged no-load operation can easily burn the coil. Repeated starting attempts with the engine not running are strictly prohibited.
When aligning the starter for installation, if the fit is too tight, use a rubber mallet to gently tap the edge of the casing to adjust the angle. Never strike directly with a steel hammer, as this may damage precision internal components such as the armature, bearings, and solenoid switch. The meshing clearance between the drive gear and the flywheel ring gear should be naturally adapted without the need for additional prying or adjustment.
Internal components of the starter, including the armature coil, field coil, and commutator, must not come into contact with oil, cleaning agents, or moisture. Oil stains on the external surface of the casing can only be wiped with gasoline-dampened and wrung-out cotton yarn. When cleaning the mounting surface, use a baffle to shield the starter’s wiring terminals to prevent cleaning agents from flowing inside and causing short circuits.
High-power starters have larger wire harness current-carrying capacity. After wiring, use original equipment manufacturer (OEM) clips to secure the wire harnesses in designated positions. Ensure a minimum 2cm safe distance from rotating components such as the engine flywheel and pulleys. Simultaneously, avoid contact between the wire harnesses and high-temperature components (e.g., exhaust pipes) to prevent aging and damage to the insulation layer.
Before installation, re-verify the starter model, drive gear tooth count, and module to confirm consistency with Nissan’s original vehicle specifications. This starter model is mostly suitable for commercial vehicles; incorrect installation of a flywheel ring gear intended for low-power models will cause meshing slippage and accelerated tooth surface wear.
References：
The previously provided installation precautions for the Nissan 24V 4.5kW starter are not derived from a single exclusive Nissan official service manual or a sole authoritative document. Instead, they are comprehensively compiled by integrating general automotive industry starter installation standards, the structural characteristics of Nissan vehicles (especially commercial vehicles compatible with this high-power starter), and multiple publicly available automotive maintenance resources. The core reference bases are as follows:
This resource specifies the core general standards for starter installation, such as verifying model compatibility before installation, tightening fixing bolts according to specified torque, and conducting operation tests after installation. It also mentions precautions including the required meshing clearance between the drive gear and flywheel ring gear, and prohibiting violent operations. These serve as the fundamental reference for content like torque specifications and mechanical assembly taboos in the compiled precautions.
Practical guides for replacing starters in Nissan trucks from overseas platforms detail key points such as waiting for a period to dissipate residual charges after disconnecting the battery's negative terminal, the starter being mostly mounted at the junction of the engine and transmission, and the need for precise alignment with the flywheel during installation. Adapted to high-power starters like the 24V 4.5kW model suitable for Nissan commercial vehicles, these details provide vehicle-specific references for targeted precautions such as "strengthening power disconnection operations" and "prohibiting violent operations during mechanical assembly".
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