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Type :
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Alternator
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Specification :
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24V 80A
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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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Quality :
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refurbish
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Delivery time :
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30 days
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The installation of the 24V alternator for Mitsubishi vehicles must follow the principles of Safe Power-off, Accurate Positioning, Standardized Torque Application, and Optimal Drive Belt Tensioning. The core basis is the Mitsubishi Original Service Manual (Chapters on Electrical System and Drive Belt). Below is the standardized installation method applicable to Mitsubishi commercial/heavy-duty models (e.g., Fuso Canter, Pajero, etc.), including torque parameters and key precautions.
New Alternator: Check for no external damage; ensure the pulley rotates smoothly without jamming or abnormal noise, and the B+ terminal threads are intact. Inspect the rectifier, carbon brushes, and bearings.
Reused Alternator: Measure the bearing clearance (≤0.2mm) and check the carbon brush length (≥5mm) before reinstallation.
Mounting Surfaces: Clean the alternator bracket and bolt holes to remove oil stains, rust, and foreign debris, ensuring a tight fit with no gaps. Apply a small amount of lithium-based grease to the bolt threads (engine oil is strictly prohibited as a substitute).
Wiring Harness and Terminals: Ensure the B+ wiring harness insulation is intact and the plugs/terminals are free from burn marks. Replace aged sealing rings/gaskets and prepare the B+ terminal insulating sleeve.
Turn the ignition switch to the LOCK position, disconnect the negative cable of the 24V battery, and wait for 5 minutes to discharge residual capacitive voltage. For vehicles equipped with a start-stop system, additionally disconnect the negative terminal of the start-stop battery.
If the IPDM/ECU bracket was removed previously, reinstall it in the original position and pre-tighten the bolts to ensure no wiring harness is pinched.
Use the alternator pulley side as the reference surface, fit it closely to the bracket positioning surface, and push the alternator into the mounting position.
Insert the mounting bolts in the bottom-to-top sequence and pre-tighten them (tighten the bottom bolt halfway and lightly fasten the top bolt, leaving room for fine adjustment).
Connect the wiring harness plug until a click is heard to confirm locking; fit the B+ terminal wiring harness and pre-tighten the nut (do not fully tighten it yet).
Use a torque wrench to fully tighten the bolts in the top-to-bottom sequence:
Use a tensioner wrench to press down the tensioner; install the belt onto the pulleys according to the original routing diagram (verify the belt model and routing). Slowly release the tensioner to ensure the belt is fully seated in all pulley grooves without slipping.
Tension Standard: Press the middle of the belt with approximately 10kgf of thumb pressure; the deflection should be 8–12mm (adjust manual tensioners to the scale mark). Manually rotate the crankshaft 2 full turns to confirm there is no interference.
After tightening the B+ terminal nut, fit the insulating sleeve and secure it in the wiring harness clip. Fasten the ground wire in the original position to avoid contact with the belt or cooling fan.
Reinstall the IPDM/ECU bracket and tighten the bolts to 10N·m. Maintain a distance of ≥50mm between the wiring harness and high-temperature components (e.g., exhaust pipe).
Reconnect the negative battery cable and tighten the terminal to 10N·m.
Turn the ignition switch to ON; the charging indicator light on the instrument panel should illuminate. Start the engine—the indicator light should turn off immediately, and the idle voltage should be 27–29V (≥26V under load).
Testing: Turn on high-load accessories (air conditioner, headlights, etc.); verify the voltage remains stable without fluctuations. Check for no abnormal belt noise or alternator vibration.
The installation of the 24V alternator for Mitsubishi vehicles must follow the principles of Safe Power-off, Accurate Positioning, Standardized Torque Application, and Optimal Drive Belt Tensioning. The core basis is the Mitsubishi Original Service Manual (Chapters on Electrical System and Drive Belt). Below is the standardized installation method applicable to Mitsubishi commercial/heavy-duty models (e.g., Fuso Canter, Pajero, etc.), including torque parameters and key precautions.
New Alternator: Check for no external damage; ensure the pulley rotates smoothly without jamming or abnormal noise, and the B+ terminal threads are intact. Inspect the rectifier, carbon brushes, and bearings.
Reused Alternator: Measure the bearing clearance (≤0.2mm) and check the carbon brush length (≥5mm) before reinstallation.
Mounting Surfaces: Clean the alternator bracket and bolt holes to remove oil stains, rust, and foreign debris, ensuring a tight fit with no gaps. Apply a small amount of lithium-based grease to the bolt threads (engine oil is strictly prohibited as a substitute).
Wiring Harness and Terminals: Ensure the B+ wiring harness insulation is intact and the plugs/terminals are free from burn marks. Replace aged sealing rings/gaskets and prepare the B+ terminal insulating sleeve.
Turn the ignition switch to the LOCK position, disconnect the negative cable of the 24V battery, and wait for 5 minutes to discharge residual capacitive voltage. For vehicles equipped with a start-stop system, additionally disconnect the negative terminal of the start-stop battery.
If the IPDM/ECU bracket was removed previously, reinstall it in the original position and pre-tighten the bolts to ensure no wiring harness is pinched.
References：
These sources are classified by authority level, with all references verifiable. Details are as follows:
Core Chapters: Charging System of Electrical System (including alternator installation, torque specifications, and wiring harness connection); Drive Belt of Engine Mechanics (including tensioning and routing). Applicable to 24V Mitsubishi models such as Fuso Canter and Pajero (equipped with 4M40/4D56/6D16 engines, etc.).
Key Parameters: Alternator mounting bolts (23–27N·m), B+ terminal (15–18N·m), ground wire bolt (10–12N·m), IPDM/ECU bracket bolt (10N·m); drive belt deflection (8–12mm), 5-minute power-off requirement, one-time replacement rule for lock bolts, etc.
Document Identification: Standard chapters of Mitsubishi Fuso/Passenger Vehicle Original Service Manual, including INFOID technical document numbers and Service Data Specifications (SDS).
Content Highlights: Technical bulletins covering power-off operation procedures, B+ terminal insulation requirements, special tool specifications for belt tensioners, residual voltage discharge guidelines, etc.
Source Path: Charging system installation manuals and service data in the Mitsubishi MTIS/ESM system.
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