3730041750 3730041751 37300-41751 27050-1110 Hot sale 24volt 70a alternator with high quality alternator rectifier for COUNTY
Applicable models:HYUNDAI COUNTY INB] 1998-2004 HYUNDAI COUNTY E INQ] 2004--
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Reference part number:A5223,UD02563A 3730041750,3730041751 ALA0236LP,37300-41751 3730041751 600820 1-3506-25W 301N20351Z ALA0236SK ALA0236RB,ALA0236WA
Product Attributes
| Rated output : | 24V 70A |
| Pulley : | 2pk |
| Size : | 40*27*21cm single unit inner box |
| Weight : | NET WEIGHT:11.65KG |
| Packaging : | Neutral kraft paper packaging |
| Spot/Pre sale : | Spot goods |
| Warranty : | 1 year |
| Product number : |
Product Details
| Type : | Acgenerator |
| Specification : | 24V 70A |
| Pulley : | 2PK |
| Brand : | NUOJIN |
| Number : | 37300-41750 |
| Quality : | Renovate |
| Delivery time : | 10 days |
Installation Method for Hyundai County 24V 70A Alternator (Professional Version)
This procedure applies to Hyundai County models with 24V 70A alternators, including safety specifications, removal, installation, torque, adjustment and precautions. It can be directly used in repair work orders and technical documents.
1. Pre‑Installation Preparation (Safety + Tools + Inspection)
1.1 Safety Operation Specifications (Mandatory)
Park the vehicle on level, solid ground. Turn off the engine, apply the parking brake, place automatic transmission in P and manual transmission in Neutral. Chock the wheels and support the vehicle securely with safety stands. Never rely only on a jack.
Disconnect the negative battery terminal (-), move the cable away from the terminal and secure it reliably. Wait 5 minutes to discharge residual voltage from the electronic control system to prevent short circuits, burnt wiring or damage to the alternator.
Wear insulated gloves and safety goggles. Open flames and smoking are strictly prohibited in the work area. Keep away from fuel lines, exhaust pipes and the battery.
Count tools before and after work to avoid leaving them in the engine compartment.
1.2 Tool List
Socket set (12/13/14/17/19 mm, including deep sockets), ratchet wrench, torque wrench, belt tensioner tool, multimeter, marker, electrical tape, clean cloth, rust remover (WD‑40).
New alternator: 24V, 70A. Verify that mounting hole spacing, pulley size, and terminals (B+, excitation/control plug, ground) are identical to the original unit.
1.3 Alternator and Mounting Position Inspection
New alternator: undamaged housing, no deformation; pulley free of wear or deformation; bearing with no seizure or abnormal noise; terminals free of oxidation or looseness.
Mounting bracket / engine mounting surface: flat, clean, free of oil, rust or deformation.
Drive belt: no cracks, aging or oil contamination; pulley grooves free of foreign matter.
Wiring harness: B+ main power cable undamaged, wire size meeting OEM standards; control plug with no terminal backout or oxidation.
2. Removal of Old Alternator (Skip if already removed)
Mark belt routing: Use a marker to mark the belt path and take photos for reference to avoid incorrect installation.
Loosen the belt: Use the belt tensioner tool to release the tensioner and remove the belt.
Disconnect electrical connections:Unplug the excitation/control connector (grasp the plug, do not pull the wire).Use a socket to loosen the B+ main power nut, remove the cable and insulate it; disconnect the ground cable and insulate.
Remove mounting bolts: The alternator is usually secured to the bracket with 2–3 M10/M12 bolts. Loosen bolts gradually in diagonal order.
Remove the old alternator: Support the alternator with both hands (approx. 5–7 kg), take it out slowly to avoid collision with the mounting surface and surrounding components.
Clean the mounting area: Clean oil and metal chips from the mounting surface and threaded holes; check thread integrity.
3. Installation of New Alternator (Core Steps)
Step 1: Positioning and Pre‑Tightening
Place the new alternator smoothly into the mounting position, align the bolt holes, and ensure the alternator fits tightly against the bracket with no gaps.
Install mounting bolts and turn them 3–4 full turns by hand to confirm aligned threads with no misalignment or damage. Do not fully tighten yet.
Step 2: Torque Tightening (Factory Standard)
Tighten mounting bolts in diagonal sequence, in 2–3 stages to 35–40 N·m (general value for Hyundai County 24V alternator).
Do not exceed the torque limit to avoid bolt breakage or housing cracking. Insufficient torque will cause loosening, abnormal noise and unstable charging.
Step 3: Electrical Connection (Strict Sequence)
First connect the ground cable: install the ground terminal, tighten the nut to 8–10 N·m to ensure a reliable ground.
Next connect the control/excitation plug: push fully into place and confirm secure locking with no slack.
Finally connect the B+ main power cable: clean the terminal contact surface, install the cable nut and tighten to 13–15 N·m. Insulate the B+ terminal (tape or protective cap) to prevent short circuits.
Wire routing: Keep all wiring away from the exhaust pipe and moving parts, secure firmly to prevent abrasion and short circuits.
Step 4: Belt Installation and Adjustment
Install the belt according to the marked routing. Use the tensioner tool to adjust tension; belt deflection: 6–8 mm (press the middle of the belt).
Rotate the crankshaft manually 2–4 times, check that the belt runs properly with no misalignment or seizure. Readjust tension to the standard value if needed.
4. Power Restoration and Function Testing
Reconnect the negative battery terminal and ensure it is tight.
Power-on check: Turn the ignition switch to the ON position; the charging warning light on the dashboard should illuminate with no abnormal warnings.
Start test: Start the engine; the charging warning light should turn off immediately. The alternator should run smoothly with no abnormal noise or vibration.
Voltage testing: Measure battery voltage with a multimeter:
Idle: 27.0–28.0 V (normal charging range for 24V system)
2000 rpm: Voltage stabilizes at 27.5–28.5 V with no large fluctuations.
Visual inspection: No oil leakage, overheating or unusual odors; no loose bolts; normal belt operation.
Troubleshooting: If the charging light remains on, voltage is abnormal or there is noise, shut off the engine immediately and check connections, torque, belt and alternator compatibility.
Hyundai County 24V 70A Alternator Installation Precautions (Detailed Professional Version)
I. Safety Operation Precautions (Mandatory)
Always disconnect the negative battery terminal (-) before operation, move the negative cable away from the terminal and secure it reliably to prevent accidental short circuits, sparks, burnt wiring, or damage to the alternator B+ main power terminal in the 24V system.
The vehicle must be parked on level, solid ground. Apply the parking brake firmly, place automatic transmission in P and manual transmission in Neutral, chock the wheels, and support the vehicle securely with safety stands. Never work using only a jack.
Always wear insulated gloves and safety goggles during operation to prevent oil and metal chips from entering eyes, and to avoid electric shock, scratches, impact injuries, or high-temperature burns.
Open flames and smoking are strictly prohibited in the work area. Keep away from fuel lines, intake pipes, high-temperature exhaust pipes, the battery, and wiring harnesses to prevent fire or explosion caused by sparks igniting fuel vapors.
Wait at least 5 minutes before removing or installing the alternator to allow residual power in the vehicle’s electronic control system to discharge completely, avoiding damage to the alternator, regulator, or engine control module from instantaneous current surges.
Count tools before and after work to ensure no wrenches, sockets, screws, washers, or other items are left in the engine compartment, near pulleys, or inside the alternator, which could damage belts, gears, housings, or components after startup.
II. Alternator and Mounting Area Inspection
The old and new alternators must be identical: 24V voltage, 70A current, mounting hole spacing, bracket structure, pulley diameter, terminal positions, and connector types must all match. Do not force-install an unmatched alternator.
Inspect the new alternator exterior:
Housing free of cracks, deformation, or impact damage;
Pulley free of wear, deformation, or endplay;
Bearing with no seizure, no abnormal noise, and smooth rotation;
Terminals free of bending, looseness, or oxidation;
Regulator and rectifier sections free of looseness or damage.
Inspect the engine mounting bracket and mounting surface:
Must be flat, clean, free of oil, rust, or deformation;
Threaded holes free of damaged threads, metal chips, or blockage;
Bracket free of cracks, deformation, or looseness, otherwise it will cause alternator tilting, belt misalignment, and premature bearing failure.
References：
Authoritative References
for Hyundai County 24V 70A Alternator Installation Method & Detailed Precautions(For direct use in service reports, technical documents and export work orders)
I. Core Authoritative Basis (OEM Standards + Industry Specifications)
1. Hyundai Commercial Vehicle OEM Service Manual
- Applicable models: Hyundai County (Bus / Passenger Version)
- Electrical System Section: Charging System – 24V 70A Alternator
- Engine / Chassis Section: Engine Mounting & Accessory Drive
- Content referenced (factory standards):
Standard removal and installation procedures for 24V 70A alternator
Alternator mounting bolt torque: 35–40 N·m
B+ main power terminal torque: 13–15 N·m
Ground cable torque: 8–10 N·m
Alternator belt tension standard: 6–8 mm deflection
Normal voltage range for 24V charging system: 27.0–28.5 V
Electrical safety operation specifications (power disconnection, insulation, wiring harness protection)
2. Hyundai Official Alternator Installation & Safety Procedures
Mandatory requirements:
Disconnect the negative battery terminal before service; wait 5 minutes to discharge residual voltage
Striking the alternator housing, terminals or pulley is strictly prohibited
B+ terminal must be insulated
Charging voltage must be measured and verified after installation
3. General Commercial Vehicle Safety & Installation Standards
QC/T 731‑2023 Technical Specifications and Installation Code for Automotive Starters and Alternators
Safety Operation Standard for Commercial Vehicle 24V Electrical System
Specifications for Maintenance Site Safety, Vehicle Support and Personal Protective Equipment
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