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Type :
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ACgenerator Alternator
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Specification :
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12V 85A
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Pulley :
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6PK
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Brand :
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NUOJIN
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Number :
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27060BZ290 27060BZ202 27060BZ201
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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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The installation method of the Daihatsu 12V alternator is similar to that of the Toyota 12V alternator. The general installation steps are as follows:
Verify the compatibility of the alternator model with the Daihatsu vehicle and ensure the voltage is 12V. Check that the alternator's mounting holes, pulley diameter, keyway dimensions, and other parameters match the original vehicle parts.
Tools: Socket wrench, torque wrench, belt tension gauge, wire crimpers, insulating tape, multimeter, cleaning cloth, fine sandpaper.
Materials: Lock washers, high-temperature resistant insulating tape, original specification wiring terminals.
Disconnect the negative connection line of the storage battery and wait 2-3 minutes for the vehicle's electronic control system to fully discharge. Clean the alternator installation area in the engine compartment to remove oil stains, dust, and debris, ensuring the mounting surface is flat and clean.
Place the alternator stably on the mounting bracket in the engine compartment, accurately align the bolt holes, and perform initial tightening with fixing bolts without reaching the standard torque to leave space for subsequent belt tension adjustment.
Polish the alternator terminals and battery posts with fine sandpaper to remove oxide layers.
Use wire crimpers to fix the dedicated terminal to the wire, then connect it to the positive pole of the storage battery and fasten it.
If the alternator is equipped with an F terminal (or D+ terminal), dock it with the corresponding interface of the voltage regulator and insert the plug tightly.
Attach the G terminal to a clean metal surface of the engine block to ensure reliable grounding.
After completing all wiring, wrap the terminal connections with multiple layers of high-temperature resistant insulating tape.
Put the drive belt around the alternator pulley and the engine drive pulley, ensuring the belt is correctly embedded in the pulley grooves. Adjust the alternator position and check the tension with a belt tension gauge; the recommended deflection at the midpoint of the belt for Daihatsu vehicles can be found in the vehicle maintenance manual. After adjustment, tighten the fixing bolts to the specified torque with a torque wrench and install lock washers.
Reconnect the negative pole of the storage battery, wait for the vehicle system self-inspection to complete, then start the engine. Let the engine idle for 5 minutes, observing whether the alternator operates smoothly without abnormal noise or belt slipping. Use a multimeter to measure the output voltage; the normal range should be 13.5-14.5V. Check that the wires are not overheated and the terminals are not loose. After confirming all indicators are normal, the installation is completed.
Core Conclusion: The installation must strictly follow the original factory specifications, focusing on the accuracy of electrical connections, precision of mechanical assembly, and details of safe operation to avoid damaging the vehicle's electronic control system and ensure long-term stable operation of the alternator.
Disconnect the negative terminal of the storage battery before wiring, and wait 2-3 minutes for the electronic control system to fully discharge to prevent short circuits from burning the ECU or alternator rectifier.
Clearly distinguish the functions of terminals: B+ (output positive), F/D+ (excitation terminal), and G (ground). Verify against the Daihatsu original factory maintenance manual and strictly prohibit incorrect or reverse connection.
Polish the terminals with fine sandpaper to remove oxide layers, fix them with original specification crimp terminals, and wrap the connections with multiple layers of high-temperature resistant insulating tape.
The alternator model must be fully compatible with the Daihatsu vehicle model. Check the mounting bracket hole positions, pulley pitch circle diameter, and keyway dimensions to avoid component deformation caused by forced assembly.
Tighten the fixing bolts to the original factory torque (usually 25-35N·m, refer to the vehicle maintenance manual for details) and must install lock washers to prevent loosening due to vibration during vehicle operation.
Strictly control the belt tension within the original factory standard (deflection is usually 10-15mm, subject to the manual), which can be detected with a tension gauge. Abnormal tension will cause bearing wear or belt slipping.
Before starting the engine, recheck the installation status of all wiring and belts. Only reconnect the negative terminal of the storage battery after confirming correctness; live operation is prohibited.
After starting, let the engine idle for 5 minutes, observe whether the alternator has abnormal vibration or noise, and measure the output voltage (normal range 13.5-14.5V).
Avoid tools colliding with the alternator housing during installation to prevent damage to internal precision electronic components.
Regularly check the belt tension and wiring terminal status within the first 300 kilometers after installation, and promptly tighten loose components.
Avoid long-term overloaded operation of the alternator and prohibit unauthorized installation of high-power electrical equipment.
When faults occur, first inspect the wiring and belt. Internal component maintenance is recommended to be performed by professional technicians; non-professionals are prohibited from disassembling.
References：According to the content of the text, there is no clear indication of a single specific source for the "Key Notes for Installation Method of Daihatsu 12V Alternator" provided. Instead, it synthesizes information from multiple sources, which may include the following:
Auto Master Website: Relevant pages such as https://q.qcds.com/ provide part of the content about the installation operations and precautions of Toyota alternators.
CSDN Document Library: The document https://wenku.csdn.net/doc/4ikfbte05p introduces the disassembly, assembly and maintenance process of the alternator in the Toyota automobile charging system, which has a certain correlation with the text content.
Other Technical Documents and Automobile-Related Websites: The text mentions referencing materials from websites such as https://m.h.ofnaxwr.cn/, https://www.tcamanual.com/, https://www.toyaris4.com/, https://www.autohome.com.cn/ and related technical document libraries. These sources collectively provide information about the installation method and precautions of the Toyota 12V alternator for the text.
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