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Type :
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Starter Motor
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Specification :
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24V 7.5KW
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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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28100-1520
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Quality :
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Remanufacture
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Delivery time :
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30 days
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The installation procedure of the 24V starter for Hino vehicles aligns with that of starters in most diesel commercial vehicles. It focuses on core steps including safe power cutoff, precise assembly, standardized wiring, and testing & verification. Combined with the layout characteristics of its commercial vehicle engine, the specific installation method is as follows:
Tools and Accessories
Prepare necessary tools such as socket wrenches, torque wrenches, cleaning rags, rust remover, and fine sandpaper. Verify that the new 24V starter is compatible with the corresponding Hino model by checking that its mounting holes, gear specifications, and terminal interfaces match those of the old starter. Prioritize original factory accessories or compliant compatible parts. Meanwhile, wear gloves and goggles to avoid contamination from oil stains or scratches from sharp metal edges during operation.
Vehicle Power Cutoff
Park the vehicle on a flat surface and firmly engage the handbrake. After turning off the engine, wait for it to cool down completely. Open the engine hood, first disconnect the negative battery cable and move it away from the terminals. This prevents short - circuit sparking during installation, which could damage the starter or the vehicle's electronic system.
Locate the starter mounting position at the junction of the engine and transmission. Thoroughly clean oil stains, dust, and rust on the mounting surface with a rag. If there is rust on the fixing brackets or bolts, spray rust remover, let it sit for a while, and then wipe them clean.Simultaneously, inspect the surrounding wire harness for damage or aging. If the outer insulation layer of the wire harness is cracked, repair it in advance to prevent short circuits during subsequent use. If you recorded the routing of the wire harness when removing the old starter, you can check and organize it in advance to facilitate wiring later.
Place the new starter steadily into the mounting position and accurately align it with the fixing holes on the bracket. Most 24V starters for Hino vehicles are usually equipped with two fixing bolts. First, screw all the bolts by hand to avoid thread stripping caused by misalignment of the holes.Then use a torque wrench to tighten the bolts in accordance with the specifications in the vehicle maintenance manual. Referring to the general standards for commercial vehicles, the tightening torque can generally be controlled at approximately 37 - 45N・m. The specific torque must be subject to the manual of the corresponding Hino model. Ensure the starter is firmly installed without looseness to prevent vibration and abnormal noise during operation.
First, handle the B + terminal (power terminal) and S terminal (control terminal) of the starter. If the terminals are rusted, gently polish and clean them with fine sandpaper. Connect the power cable to the B + terminal and tighten the nut with a torque of about 12±2N・m to avoid terminal breakage due to excessive torque.Press the buckle of the wire harness connector for the S terminal and insert it smoothly into the corresponding interface; never pull the wires forcefully. Pay attention to the routing of the wire harness to avoid interference with components such as the transmission counterweight. You can use adhesive tape to fasten the small wire near the S terminal to the main cable at the junction. After completing all connections, fit insulation sleeves on all terminals.
Reinstall the auxiliary components removed during the disassembly process, such as the radiator air deflector and wire harness bracket. Fasten the wire harness bracket with bolts at a torque of about 8.4N・m, and then install the wire harness clips to prevent the wire harness from shaking and rubbing. Subsequently, reconnect and tighten the negative battery cable.Before starting the vehicle, a simple test can be performed. Clamp the starter in a bench vice to conduct a 12V no - load test first, then switch to a 24V no - load test. Observe whether the pinion can expand and contract normally and if there is any abnormal noise during operation. After starting the vehicle, check that no starting system fault light is illuminated on the instrument panel. The starter should smoothly drive the engine to start without abnormal vibration or noise during operation; if so, the installation is qualified.
The core precautions for installing the 24V starter on Hino vehicles focus on safety protection, assembly precision, electrical specifications, and test verification, with additional exclusive reminders tailored to commercial vehicle characteristics. Details are as follows:
Disconnect the negative battery terminal first and move the cable away from the terminals throughout the entire process. Commercial vehicles with 24V voltage have a higher risk of short circuits; it is crucial to prevent sparking during wiring or operation to avoid damaging the starter coil or the vehicle’s electronic system.
Perform operations only after the engine has completely cooled down. Keep away from high-temperature components such as the engine exhaust pipe and turbocharger, and wear gloves and goggles to prevent scalds, oil splatters, or scratches from metal edges.
Do not strike precision components such as the starter housing, gears, or terminals with metal tools—this avoids damage to internal coils, clutches, or one-way clutches. Meanwhile, never pull or bend the wire harness forcefully.
Thoroughly clean the mounting surface and bracket contact areas to ensure they are free of oil, rust, or debris. Treat rusted components with rust remover; otherwise, loose starter fixation may occur, and faults are likely to worsen under the high-frequency vibration environment of commercial vehicles.
Tighten the fixing bolts to the torque specified in the vehicle’s maintenance manual (reference range: 37-45N·m). Loose bolts will cause vibration and abnormal noise during operation, while over-tightening may crack the housing or damage the mounting bracket—use a torque wrench for precise operation.
Accurately align the starter with the mounting holes. Pre-tighten all bolts by hand before final tightening to avoid thread stripping due to hole misalignment. After installation, check the gap between the starter and the flywheel ring gear to ensure smooth gear meshing without jamming risks.
References：
The installation method and precautions for the 24V starter on Hino vehicles you previously asked about are not derived from a single specific document. Instead, they are compiled based on the general specifications for commercial vehicle starter installation, combined with the core logic of Hino’s official maintenance materials. The key reference sources focus on Hino’s official maintenance documents and industry general maintenance guidelines, as detailed below:
This serves as the core basis for the relevant installation operations and precautions. Hino provides exclusive maintenance manuals for engines, chassis, and other components on its official online service platform, covering details such as the installation process, bolt tightening torque, and wiring specifications for the 24V starter of each model. For example, the maintenance manuals for mainstream models like the 155DC, 238, and 338 clearly specify requirements such as disconnecting the negative battery terminal before installation and connecting the solenoid switch wires in sequence—these highly align with the previously outlined installation precautions. These manuals can be subscribed to and purchased through Hino’s official website, or the corresponding PDF versions can be obtained from professional commercial vehicle manual platforms such as Truckmanualshub.
As a commercial vehicle brand, Hino’s 24V starter installation adheres to the general maintenance guidelines for commercial vehicle starters, and such general specification documents serve as important supplementary references. For instance, precautions mentioned in starter disassembly and assembly guides published by platforms like Pacific Auto Encyclopedia and Autohome—such as "strictly prohibiting striking precision components of the starter," "conducting a no-load test after assembly," and "cleaning components like the armature with gasoline-wrung cotton yarn"—are equally applicable to Hino models. In addition, the installation logic for 24V starters in diesel models from other commercial vehicle brands such as MAN and Mitsubishi (e.g., installing in the reverse order of disassembly, checking the wear of the flywheel ring gear) is consistent with the core requirements of Hino starter installation, which can cross-verify operational key points.
The online service section of Hino’s official website provides free downloadable technical tip documents. These documents issue streamlined key points for the installation and maintenance of wear-prone components such as starters. For example, for Hino models equipped with special starting control systems, the technical tips supplement exclusive wiring specifications to avoid damaging the control unit due to incorrect circuit connections—this is also one of the reference bases for the "electrical connection specifications" section in the previously compiled installation precautions.
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