Automobile generator 1800A545 A1TG2281ZJ ALM3854BS is suitable for Mitsubishi L200 L300 [4N14] 2020

Preparation:

• Prepare the required tools, such as a metric socket set, metric wrench set, jack, wheel chocks, jack stands, etc.

• Park the vehicle on a safe, flat surface, turn off the engine, pull up the handbrake, and switch off all electrical devices.

• Disconnect the vehicle's negative battery cable to prevent short circuits and electric shocks.

Removing the Old Generator:

• Lift the vehicle's hood and secure it properly. If necessary, use a jack and jack stands to lift one side of the vehicle, and place wheel chocks to ensure safety.

• Locate the generator belt tensioner, use a suitable tool to loosen the tensioner, and then remove the generator belt.

• Disconnect the wire connectors attached to the generator, and remember the position and connection method of each connector.

• Use sockets and wrenches to loosen and remove the bolts and nuts fixing the generator, then take the old generator off the bracket.

Cleaning the Installation Position:

Installing the New Generator:

• Place the new generator on the mounting bracket and initially fix it with bolts and nuts without fully tightening them.

• Connect the wire connectors according to the previously recorded positions and methods, ensuring a secure connection.

• Install the generator belt onto the generator pulley and other relevant pulleys.

• Use a tool to adjust the belt tensioner so that the belt has appropriate tension. Generally speaking, when pressing the middle of the longest span of the belt with a finger, the deflection of the belt should not exceed 1/4 to 1/2 inch (approximately 6.35 mm to 12.7 mm).

Final Fixation:

Reconnecting the Negative Battery Cable:

Inspection and Testing:

• Start the vehicle and observe the operating status of the generator, including whether the charging indicator light turns off after startup.

• Use a voltmeter to measure the voltage across the battery. When the engine is running, the voltage should be within the normal range. For a 12V system, the voltage is usually between 13.5V and 14.5V.

• Meanwhile, listen for any abnormal noise from the generator during operation, and check if the belt runs smoothly without slipping, bouncing, or abnormal wear.

I. Circuit Safety Operations

• Keep the negative battery terminal disconnected throughout the process and do not reconnect it until installation is complete, preventing short circuits or electric shocks caused by tools touching the wires.

• Wire connectors must be connected strictly corresponding to their original positions to avoid wrong pin or positive/negative pole connections. Fully insert and secure the connectors, and properly insulate exposed joints.

• Avoid wearing metal accessories during operation, keep tools dry, and stay away from exposed wire harnesses and terminals in the engine compartment to prevent accidental conduction.

II. Key Requirements for Component Installation

• The new generator must be fully compatible with the original vehicle model and power. Before installation, check that the pulley and bearing rotate smoothly without jamming, abnormal noise, or axial movement.

• Install fixing bolts in their original positions, with the tightening torque controlled between 15-20N·m (refer to the vehicle model manual for specific values). Avoid looseness leading to vibration or over-tightening damaging threads and the housing.

• Thoroughly clean the installation surface of oil stains, rust, and debris. Apply a small amount of anti-rust agent if necessary to ensure the generator fits tightly with the bracket, without tilting, gaps, or wobbling.

III. Belt Installation and Tension Control

• Select a belt of specifications suitable for the vehicle model, and accurately embed it into the grooves of each pulley. Do not allow misalignment, distortion, or detachment, and avoid prying the belt teeth with hard objects during installation.

• Adjust tension in accordance with the standard of "6.35-12.7 mm deflection when pressed". Too loose a belt easily slips, causing insufficient power generation; too tight a belt accelerates wear of bearings and the belt, and may even deform the generator shaft.

• After installing a new belt, recheck the tension when the vehicle has traveled about 500KM. Also inspect it before restarting a vehicle that has been parked for a long time, and make timely fine adjustments to avoid tension attenuation.

IV. Post-Installation Inspection and Abnormality Handling

• After starting the vehicle, observe if the charging indicator light turns off within 3 seconds. If it remains on, shut down the engine immediately to check for wrong wiring, loose connectors, or improper belt installation.

• Use a voltmeter to measure the voltage. A stable voltage of 13.5-14.5V at idle speed is normal. Excessively high voltage may burn electrical equipment; excessively low voltage requires checking the wiring or generator regulator.

• After 5-10 minutes of operation, check if the generator overheats (normal if it is not hot to the touch), listen for abnormal noise, and observe if the belt runs smoothly without slipping or bouncing.

V. Other Important Reminders

• Use metric-sized tools to avoid bolt stripping or component scratches caused by non-compliant tools. Handle with care during disassembly and installation to avoid colliding with the generator housing and terminals.

• If the generator is equipped with accessories such as a regulator or rectifier, check their integrity before installation to ensure the terminals are free of oxidation and looseness.

• If you are not familiar with the vehicle's circuit structure, refer to the maintenance manual for the corresponding Mitsubishi model or have the installation performed by professional maintenance personnel. Do not disassemble or wire blindly.

References：The content regarding the installation precautions for the 12V generator of Mitsubishi Motors has some similarities with the relevant content on platforms such as PCauto, Autohome, and Book118, but it is not exactly the same. The content on these platforms is mainly about the general installation precautions for automotive generators, and there is no specific source information that completely matches the passage provided by the user.