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: | |
|---|---|
AZ7129320436
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Inter-Axle Differential Assembly / Axle-to-Axle Differential Unit |
| OEM Number | AZ7129320436 |
| Alternate Numbers | WG9981320436, AZ9981320436 (supplier-specific variants) |
| Differential Type | Bevel gear-type inter-axle differential (spiral bevel gears) |
| Gear Configuration | Precision-cut spiral bevel gears with planetary setup for speed differentiation |
| Material | High-strength alloy steel (e.g., 20CrMnTi or 18CrNiMo7-6), heat-treated for hardness and fatigue resistance |
| Heat Treatment | Carburizing + quenching + tempering — surface hardness ~58–62 HRC |
| Function | |
| • Allows front and rear drive axles to rotate at different speeds | |
| • Distributes torque evenly across multiple drive axles | |
| • Reduces wheel slippage and drivetrain binding | |
| Application | Used in tandem axle systems (e.g., 6×4, 8×4 configurations) |
| Compatibility | Matches AC16 Series Heavy-Duty Drive Axles (16-ton capacity) |
| Lubrication Requirement | Filled with GL-5 85W-90 or 80W-90 synthetic gear oil |
| Oil Capacity | ~5–7 liters (varies by housing design) |
| Operating Conditions | Withstands continuous torque loads >10,000 N·m and severe off-road use |
| Condition | Brand new (OEM fresh stock or premium remanufactured) |
Name1
Name2
Professional Installation Required
Involves disassembling driveshafts, removing carriers, and adjusting gear backlash.
Must be performed by certified heavy-duty mechanics familiar with tandem axle systems.
Clean Environment Only
Never install in dusty or dirty environments — metal shavings or debris can damage bearings.
Use Correct Gear Oil
Fill with high-quality GL-5 or GL-5+ 85W-90 synthetic gear oil.
Do not mix mineral and synthetic oils.
Maintain Proper Oil Level
Check via inspection plug — oil should reach bottom edge of fill hole.
Overfilling causes foaming; underfilling leads to overheating.
Set Correct Backlash & Preload
Adjust pinion depth and bearing preload using torque specs and dial gauge.
Typical backlash: 0.25–0.35 mm (check service manual).
Torque Fasteners to Specification
Tighten casing bolts to manufacturer-recommended torque (~200–250 Nm).
Follow star-pattern tightening sequence.
Avoid Locking While Turning
If equipped with differential lock, never engage at high speed or during sharp turns.
Risk of sudden loss of control or mechanical failure.
Inspect for Leaks After Installation
Input/output seals
Drain/fill plugs
Flange gaskets
Run truck for 10–15 minutes, then check:
Fix immediately if any seepage occurs.
Listen for Abnormal Noises
Whining → gear misalignment
Knocking → worn bearings or cracked housing
Humming → low lubricant level or poor mesh contact
Regular Inspection Schedule
Oil leaks
Cracks or dents
Mounting bracket integrity
Inspect every 50,000 km or quarterly for:
Replace damaged units promptly.
Do Not Operate Without Lubrication
Running dry causes immediate gear scoring and permanent damage.
Storage Advice
Store upright in sealed packaging.
Keep in dry indoor environment away from moisture and temperature extremes.
| Attribute | Description |
|---|---|
| Part Name | Inter-Axle Differential Assembly / Axle-to-Axle Differential Unit |
| OEM Number | AZ7129320436 |
| Alternate Numbers | WG9981320436, AZ9981320436 (supplier-specific variants) |
| Differential Type | Bevel gear-type inter-axle differential (spiral bevel gears) |
| Gear Configuration | Precision-cut spiral bevel gears with planetary setup for speed differentiation |
| Material | High-strength alloy steel (e.g., 20CrMnTi or 18CrNiMo7-6), heat-treated for hardness and fatigue resistance |
| Heat Treatment | Carburizing + quenching + tempering — surface hardness ~58–62 HRC |
| Function | |
| • Allows front and rear drive axles to rotate at different speeds | |
| • Distributes torque evenly across multiple drive axles | |
| • Reduces wheel slippage and drivetrain binding | |
| Application | Used in tandem axle systems (e.g., 6×4, 8×4 configurations) |
| Compatibility | Matches AC16 Series Heavy-Duty Drive Axles (16-ton capacity) |
| Lubrication Requirement | Filled with GL-5 85W-90 or 80W-90 synthetic gear oil |
| Oil Capacity | ~5–7 liters (varies by housing design) |
| Operating Conditions | Withstands continuous torque loads >10,000 N·m and severe off-road use |
| Condition | Brand new (OEM fresh stock or premium remanufactured) |
Name1
Name2
Professional Installation Required
Involves disassembling driveshafts, removing carriers, and adjusting gear backlash.
Must be performed by certified heavy-duty mechanics familiar with tandem axle systems.
Clean Environment Only
Never install in dusty or dirty environments — metal shavings or debris can damage bearings.
Use Correct Gear Oil
Fill with high-quality GL-5 or GL-5+ 85W-90 synthetic gear oil.
Do not mix mineral and synthetic oils.
Maintain Proper Oil Level
Check via inspection plug — oil should reach bottom edge of fill hole.
Overfilling causes foaming; underfilling leads to overheating.
Set Correct Backlash & Preload
Adjust pinion depth and bearing preload using torque specs and dial gauge.
Typical backlash: 0.25–0.35 mm (check service manual).
Torque Fasteners to Specification
Tighten casing bolts to manufacturer-recommended torque (~200–250 Nm).
Follow star-pattern tightening sequence.
Avoid Locking While Turning
If equipped with differential lock, never engage at high speed or during sharp turns.
Risk of sudden loss of control or mechanical failure.
Inspect for Leaks After Installation
Input/output seals
Drain/fill plugs
Flange gaskets
Run truck for 10–15 minutes, then check:
Fix immediately if any seepage occurs.
Listen for Abnormal Noises
Whining → gear misalignment
Knocking → worn bearings or cracked housing
Humming → low lubricant level or poor mesh contact
Regular Inspection Schedule
Oil leaks
Cracks or dents
Mounting bracket integrity
Inspect every 50,000 km or quarterly for:
Replace damaged units promptly.
Do Not Operate Without Lubrication
Running dry causes immediate gear scoring and permanent damage.
Storage Advice
Store upright in sealed packaging.
Keep in dry indoor environment away from moisture and temperature extremes.
