Maximize Drivability: Sourcing ZF Differential Parts and Bearings (e.g., PLANETARY GEAR 4644.304.049)
Introduction: Drivetrain Beyond the Transmission


For full maintenance and service capability, distributors must look beyond the transmission to the integrated ZF Axle Systems. Failure in the differential assembly compromises machine traction and drivability.
This guide from Tianjin XiaoHang Construction Machinery Co., Ltd. helps you stock the critical parts for ZF axle systems, including the high-stress PLANETARY GEARS.
Section 1: Key Components in the ZF Differential
Inside the Differential Housing
The ZF differential assembly (4644.104.016) is responsible for distributing torque. Key components that require service and replacement are:
- PLANETARY GEAR 4644.304.049: The core rotating gear (Quantity 6).
- CYLINDER ROLLER BEARING 0735.470.232: High-precision bearing that supports the planetary gear sets.
- SHAFT SEAL 0750.111.116: Critical external seal (90x120x13).
Section 2: The Importance of Gear Metallurgy
Quality Sourcing for High Torque
The PLANETARY GEARS 4644.304.049 and the supporting bearings must withstand immense, continuous torque loads. XiaoHang Machinery Co.’s 20 years of repair expertise ensures we supply components that meet the exact hardness and material specifications required by ZF, preventing premature catastrophic failure.
Section 3: Sourcing for a Complete Driveline Service
The XiaoHang Advantage
XiaoHang Machinery Co. offers a simplified, single-source solution. We supply both the transmission overhaul kits and essential ZF Axle components (including the differential parts) with fast lead times and competitive pricing.
Conclusion: Offer Total Drivetrain Reliability
Expand your service offerings. Contact XiaoHang Machinery Co. today to secure verified ZF differential and axle components.
| Contact Detail | Information |
| Sales Representative | Tony Chang |
| Trading Entity | TIANJIN LINKWORLD TRADING CO. LTD |
| Direct Contact (Phone/WhatsApp) | +86 15822863467 |
| 5858518@gmail.com | |
| Expertise Provided by | Tianjin XiaoHang Construction Machinery Co., Ltd. |