T: +8615609213525
E: 15829336298@139.com
E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
| Quantity: | |
|---|---|
2972YA2-3000-J
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Generator Regulator / Voltage Regulator / Alternator Regulator |
| Common Names | VR Module, Internal/External Regulator, Charging System Controller |
| Function | Monitors alternator output voltage and adjusts field current to maintain consistent system voltage (typically 27.6–28.8V for 24V trucks) |
| Mounting Type | • Internal: Built into modern brushless alternators (most common) • External: Mounted separately on firewall or chassis (older models) |
| Compatibility | Designed for use with 24V DC charging systems in heavy-duty diesel trucks |
| Control Method | Solid-state electronic regulation using feedback loop from battery voltage |
| Replacement Level | Often replaced as part of an alternator rebuild kit or as a standalone module |
Name1
Name2
| Parameter | Specification |
|---|---|
| Rated System Voltage | 24V DC (Nominal); regulates between 27.6V and 28.8V under load |
| Operating Voltage Range | 20–32V input range for stability during cranking and surge conditions |
| Regulation Accuracy | ±0.3V (ensures precise charge control) |
| Field Current Output | Typically 3–5A max (controls rotor excitation winding) |
| Temperature Compensation | Automatically adjusts output based on ambient temperature (reduces voltage when hot) |
| Duty Cycle | Continuous operation at full load |
| Housing Material | Heat-resistant ABS plastic or aluminum alloy casing |
| Cooling Method | Conduction cooling via mounting surface; some models include heat sink fins |
| Protection Features | • Overvoltage protection (e.g., shutdown above 32V) • Undervoltage detection • Reverse polarity protection (on newer models) • Short-circuit protection |
| Connector Type | Multi-pin plug (e.g., 3-wire, 4-wire, or integrated slip-ring connection) |
| Weight | 0.15 – 0.3 kg (depending on type) |
| Operating Temperature Range | -40°C to +110°C (-40°F to +230°F) |
| Compliance Standards | Meets ISO 4165, J559, GB/T standards for automotive alternator regulators |
⚠️ WARNING: The charging system operates at high current. Always disconnect the battery before servicing.
Park securely and apply parking brake.
Disconnect both battery terminals (start with negative).
Wait 2 minutes for residual power to dissipate.
Locate the alternator on the engine front cover.
Remove protective covers if needed.
Take note of belt tension and wiring routing.
Unplug the regulator connector (if external).
For internal regulators: remove back cover of alternator to access regulator assembly.
Label wires if multiple connections exist.
Unscrew mounting screws (M4/M5 typically).
Carefully extract the old unit — avoid damaging brushes or slip rings.
Insert new regulator into place.
Secure with original hardware.
Ensure good contact with brush holders and grounding points.
Reconnect all wires properly.
Reinstall alternator cover and re-tension drive belt.
Reconnect battery.
Start engine and measure system voltage at idle and ~1500 RPM.
✅ Normal Reading: 27.6V – 28.8V
If GEN light stays on or voltage is too low/high → check regulator function and belt condition.
| Attribute | Description |
|---|---|
| Part Name | Generator Regulator / Voltage Regulator / Alternator Regulator |
| Common Names | VR Module, Internal/External Regulator, Charging System Controller |
| Function | Monitors alternator output voltage and adjusts field current to maintain consistent system voltage (typically 27.6–28.8V for 24V trucks) |
| Mounting Type | • Internal: Built into modern brushless alternators (most common) • External: Mounted separately on firewall or chassis (older models) |
| Compatibility | Designed for use with 24V DC charging systems in heavy-duty diesel trucks |
| Control Method | Solid-state electronic regulation using feedback loop from battery voltage |
| Replacement Level | Often replaced as part of an alternator rebuild kit or as a standalone module |
Name1
Name2
| Parameter | Specification |
|---|---|
| Rated System Voltage | 24V DC (Nominal); regulates between 27.6V and 28.8V under load |
| Operating Voltage Range | 20–32V input range for stability during cranking and surge conditions |
| Regulation Accuracy | ±0.3V (ensures precise charge control) |
| Field Current Output | Typically 3–5A max (controls rotor excitation winding) |
| Temperature Compensation | Automatically adjusts output based on ambient temperature (reduces voltage when hot) |
| Duty Cycle | Continuous operation at full load |
| Housing Material | Heat-resistant ABS plastic or aluminum alloy casing |
| Cooling Method | Conduction cooling via mounting surface; some models include heat sink fins |
| Protection Features | • Overvoltage protection (e.g., shutdown above 32V) • Undervoltage detection • Reverse polarity protection (on newer models) • Short-circuit protection |
| Connector Type | Multi-pin plug (e.g., 3-wire, 4-wire, or integrated slip-ring connection) |
| Weight | 0.15 – 0.3 kg (depending on type) |
| Operating Temperature Range | -40°C to +110°C (-40°F to +230°F) |
| Compliance Standards | Meets ISO 4165, J559, GB/T standards for automotive alternator regulators |
⚠️ WARNING: The charging system operates at high current. Always disconnect the battery before servicing.
Park securely and apply parking brake.
Disconnect both battery terminals (start with negative).
Wait 2 minutes for residual power to dissipate.
Locate the alternator on the engine front cover.
Remove protective covers if needed.
Take note of belt tension and wiring routing.
Unplug the regulator connector (if external).
For internal regulators: remove back cover of alternator to access regulator assembly.
Label wires if multiple connections exist.
Unscrew mounting screws (M4/M5 typically).
Carefully extract the old unit — avoid damaging brushes or slip rings.
Insert new regulator into place.
Secure with original hardware.
Ensure good contact with brush holders and grounding points.
Reconnect all wires properly.
Reinstall alternator cover and re-tension drive belt.
Reconnect battery.
Start engine and measure system voltage at idle and ~1500 RPM.
✅ Normal Reading: 27.6V – 28.8V
If GEN light stays on or voltage is too low/high → check regulator function and belt condition.
