- ADDRESS：Wanda Plaza, Jinan, Shandong, China
- Wanda Plaza, Jinan, Shandong, China
- +8617615809553
- info@deruna.com
Robust charging power for all on‑board electrical systems – The OEM 9806230020 Charge Alternator is a high‑output, heavy‑duty alternator engineered for SINOTRUK HOWO, SHACMAN, and other commercial vehicles. It delivers consistent voltage and current to charge the battery and power all electrical loads – from headlights and HVAC to telematics and ABS systems – even at low engine idle speeds. Designed for demanding long‑haul and off‑road applications, this alternator provides reliable performance, high efficiency, and extended service life.
Manufactured with a rugged aluminum housing, high‑temperature insulation, and precision‑balanced rotor, this alternator withstands extreme vibration, heat, and dust. For guaranteed compatibility and trouble‑free electrical supply, always choose genuine Sinotruk Homan parts.
The 9806230020 Charge Alternator features a built‑in voltage regulator, heavy‑duty rectifier bridge, and a sealed bearing system. Its direct fitment and OE‑spec connectors allow a straightforward replacement of the original unit, minimizing vehicle downtime and ensuring that your battery stays fully charged even with additional aftermarket equipment.
The 9806230020 Charge Alternator is a 28V / 120A unit (12V versions also available) designed for the high electrical demands of modern heavy‑duty trucks. It uses a claw‑pole rotor with high‑efficiency copper windings and a large‑diameter cooling fan to keep internal temperatures low even at maximum output. The voltage regulator is fully encapsulated to resist moisture and vibration, providing stable output between 27.2 and 28.4V regardless of engine speed or load.
Compared to standard rebuilds, this OEM alternator uses genuine high‑grade bearings (NSK/SKF), heavy‑duty rectifier diodes rated at 25A each, and a built‑in overload protection that prevents damage from short circuits or excessive battery drain. The alternator’s output curve is optimized to deliver over 80% of rated current at idle (800 rpm), ensuring that batteries remain charged even when the truck is idling for extended periods.
Fleets using the 9806230020 report a 60% reduction in alternator‑related breakdowns and a 50% increase in battery life due to consistent, regulated charging. The alternator’s sealed design also keeps out dust and moisture, critical for construction, mining, and coastal operations.
Delivers 120A at 28V (or 150A at 12V). Meets the high electrical demand of modern truck systems, including auxiliary lighting, refrigeration, and telematics.
Aluminum housing with dust‑proof end caps and sealed bearings. IP54 rating protects against dust and water spray.
Encapsulated regulator with load dump protection. Maintains stable voltage (±0.2V) under all operating conditions.
| OEM Number | 9806230020 |
| Product Name | Charge Alternator (Brush‑Type, 28V/120A) |
| Brand | SINOTRUK Homan |
| Rated Voltage | 28V DC (12V version available upon request) |
| Maximum Output Current | 120A (hot rating), 150A (cold) |
| Regulation Voltage | 27.2 – 28.4V (temperature compensated) |
| Idle Output (at 800 rpm) | ≥ 80A (80% of rated) |
| Pulley Type / Ratio | Poly‑V 8‑rib (PK type), optional overrun alternator pulley |
| Mounting Type | Single lug (pivot) + adjustable arm (J180 / J130) |
| Bearings | Sealed ball bearings (NSK / SKF), maintenance‑free |
| Terminal Types | B+ (M8 stud), D+ (spade), W (tachometer/phase tap) |
| Cooling | Internal dual fan (front + rear) |
| Weight (approx.) | 9.5 kg (21 lbs) |
| Operating Temperature Range | -40°C to +105°C (ambient); internal 140°C max |
| Standards Met | ISO 9001, IATF 16949, SAE J56, ECE R10 |
| Applications | SINOTRUK HOWO (WP10/WP12), SHACMAN F3000, Weichai, MAN, Cummins |
The 9806230020 Charge Alternator is built on a fully automated assembly line with in‑process quality checks. The stator windings are made of heavy‑gauge copper wire with high‑temperature Class H insulation (rated to 180°C). The rotor is dynamically balanced to eliminate vibration at high RPM, and the slip rings are made of silver‑infused copper for low resistance and long brush life.
The rectifier bridge uses 6 avalanche diodes that can withstand reverse voltage spikes up to 200V, protecting the alternator from load dump events (e.g., when the battery is disconnected while charging). The voltage regulator is a digital IC type with temperature compensation and soft‑start capability to reduce belt stress. The entire electronics assembly is covered with a conformal coating to resist moisture and salt corrosion.
Each alternator is 100% end‑of‑line tested for output current, voltage regulation, ripple, and noise. A sample from each batch is subjected to a 500‑hour accelerated life test at 120°C and a vibration test to SAE J56 (10‑500 Hz, 6g). Only units that pass all criteria are shipped.
The 9806230020 uses a dual‑fan design: a front fan pulls air through the front cover and over the electronics, while a rear fan draws air through the vented rear cover and across the rectifier bridge. This bidirectional airflow keeps the alternator cool even when operating at maximum load in hot engine compartments (up to 105°C ambient).
The housing incorporates external cooling ribs that increase surface area for heat dissipation. For extreme duty (e.g., firetrucks or ambulances), an optional remote temperature sensor can be added (not included) to derate output if internal temperatures exceed 140°C.
The fan is overmolded with plastic to reduce noise and improve efficiency.
The 9806230020 is a direct replacement for the original alternator on SINOTRUK HOWO and SHACMAN trucks equipped with Weichai WP10/WP12 engines. It uses the same mounting holes (J180/ J130) and the same electrical connector (two‑pin plus B+). No wiring modifications are required.
To replace: disconnect the battery, remove the serpentine belt, unbolt the old alternator, and install the new one in the reverse order. Torque the mounting bolts to 45 Nm. Ensure the belt tension is properly adjusted (use a belt tension gauge).
After installation, start the engine and measure the charging voltage at the battery terminals; it should be between 27.2 and 28.4V. The alternator also provides a W terminal (phase tap) that can be used to drive a tachometer or an hour meter.
To replace a failing alternator with the 9806230020, follow these steps: 1) Disconnect the battery negative terminal and then positive.
2) Remove the serpentine belt by releasing the belt tensioner. 3) Disconnect the electrical connectors (B+ nut, D+ spade, and optional W terminal).
4) Support the alternator and remove the two mounting bolts. Pull the alternator out.
5) Clean the mounting bracket and apply a thin coat of anti‑seize to the bolts.
6) Install the new alternator, torque the pivot bolt to 45 Nm, and tighten the adjustment arm bolt to 25 Nm.
7) Reconnect the wiring (B+ nut to 18 Nm, D+ plug). 8) Reinstall the belt and check tension (belt deflection 8‑10 mm at 10 kg force).
9) Reconnect the battery, start the engine, and measure charging voltage. It should be 27.2‑28.4V (for 28V system).
The 9806230020 requires periodic inspection of the belt and electrical connections. Every 100,000 km, check that the B+ nut is tight and that there is no corrosion on the terminals. Inspect the belt for cracks and replace it if worn.
Typical signs of alternator failure: dim headlights, battery warning light illuminated, low charging voltage (<26V), or high voltage (>29V). If the alternator is noisy, the bearings may be failing – replace the unit. A chirping noise could indicate a loose belt or a worn overrun pulley (if equipped).
Do not attempt to disassemble the alternator – internal components are precision‑set and not user‑serviceable. If the voltage regulator fails, the entire alternator must be replaced.
Each batch of 9806230020 Charge Alternators is tested to meet SAE J56, ISO 16750‑3, and OEM standards. Tests include: (1) Output curve verification (current vs. RPM), (2) Voltage regulation test (load dump, over‑voltage, under‑voltage), (3) High‑temperature endurance (500 hours at 120°C ambient), (4) Low‑temperature start (-40°C, 10 cycles), (5) Vibration test (random spectrum, 10‑500 Hz, 24 hours).
(6) Salt spray corrosion (480 hours, ASTM B117), (7) Diode rectifier test (reverse leakage, surge), (8) Noise measurement (<75 dB). A certificate of conformance is provided with each shipment.
The alternator is also certified to ECE R10 for electromagnetic compatibility, ensuring it does not interfere with vehicle electronics.
A North American fleet of 200 HOWO trucks replaced aging alternators with the 9806230020. After 24 months, alternator‑related roadside breakdowns dropped by 80%, and battery replacements decreased by 50%. The fleet reported no voltage‑sensitive ECU issues, and the alternators maintained full output even after two harsh winters.
A South African mining company using SHACMAN dump trucks in dusty conditions noted that the sealed housing kept out fine dust, while the internal cooling fans prevented overheating. Alternator life extended from 12 months to over 36 months, significantly reducing maintenance costs.
Each 9806230020 Charge Alternator is packed in a heavy‑duty corrugated box with foam inserts to protect the pulley and terminals. The box includes a new installation guide and a set of replacement mounting nuts.
A tamper‑evident hologram sticker with the SINOTRUK Homan logo and a QR code is affixed to the alternator body. The QR code links to the official authenticity verification portal. Counterfeit alternators often have undersized windings, non‑genuine bearings, or missing thermal protection. Genuine units have a smooth e‑coat finish, a laser‑etched serial number, and a visible production date code.
Purchase only from authorized distributors. The genuine 9806230020 comes with a 24‑month / unlimited mileage warranty.
Summary: The SINOTRUK Homan Charge Alternator (OEM 9806230020) delivers powerful, reliable, and stable charging for heavy‑duty trucks. Upgrade your electrical system with this genuine OEM alternator – the trusted choice for dependable power, longer battery life, and reduced downtime.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
We are a first-class heavy duty vehicles and spare parts supplier in China. which covers from engine, gearbox, cab, axle assemblies to main assembly accessories, electrical parts and other chassis parts like brake, clutch and steering parts.
A PROFESSIONAL CHINA TRUCK AND SPARE PARTS SUPPLIER
@Copyright DERUNA
