Overview
The ZF 0735.321.225 Axial Roller Ring is a precision-engineered component designed to manage axial thrust loads within the planetary gear sets of heavy-duty construction machinery transmissions. Positioned between rotating shafts and stationary housings, this OEM genuine part ensures smooth power transfer and reduces friction in high-torque applications. The SKU 0735.321.225 is a critical wear item that directly supports the differential assembly, working in concert with the 5838109009: DIFFERENTIAL to maintain gear alignment and prevent axial play.
Symptoms of Failure
- Transmission whining noise under load: A high-pitched metallic sound during acceleration or uphill operation often indicates a worn axial roller ring losing its load-bearing capacity.
- Intermittent gear slippage in forward gears: When the ring fails to maintain proper axial clearance, the 0750117075: TAPER ROLLER BEARING may experience uneven wear, leading to momentary power loss.
- Metal debris in transmission oil filter: Flaking from a degraded axial roller ring contaminates the hydraulic system, often accompanied by reduced shift quality.
- Excessive end-play in the output shaft: Measurable axial movement at the flange indicates the ring can no longer control thrust loads, risking damage to the 2093209023: DIFFERENTIAL and 5838300626: DIFFERENTIAL HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0735.321.225 |
| Outer Diameter | 120 mm (estimated) |
| Inner Diameter | 85 mm (estimated) |
| Thickness | 8 mm (estimated) |
| Material | Case-hardened bearing steel (16MnCr5) |
| Weight | 0.45 kg (estimated) |
| OEM Reference | ZF 0735.321.225 |
| Surface Finish | Ground and polished raceways |
Compatibility
This axial roller ring is primarily used in ZF WG180, WG200, and WG310 series powershift transmissions found in wheel loaders, graders, and dump trucks. It also fits select ZF Ecomat and Ecolife models where axial thrust support is required in the planetary carrier assembly. Always verify fitment with your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on shafts |
| 2093209023 | DIFFERENTIAL | Secondary torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and supports differential gears |
| 0631329088 | SPRING PIN | Secures components against rotation |
| 5838300811 | THRUST WASHER | Controls axial clearance in gear sets |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at right angles |
| 5838300633 | AXLE | Transmits rotational force to wheels |
| 5838300753 | THRUST WASHER | Reduces friction in planetary gear sets |
| 5838300818 | THRUST WASHER | Prevents metal-to-metal contact in hubs |
Frequently Asked Questions
Q: Can I replace the ZF 0735.321.225 without removing the transmission?
A: In most ZF WG-series transmissions, the axial roller ring is accessible after removing the output flange and differential housing. However, we recommend consulting the service manual for your specific model.
Q: How often should this axial roller ring be inspected?
A: During every major transmission overhaul (typically 5,000-8,000 operating hours), or immediately if you notice whining noises or metal particles in the oil.
Q: Is the 0735.321.225 interchangeable with aftermarket rings?
A: Only OEM genuine parts guarantee the exact case-hardening depth and raceway geometry required for ZF transmissions. Aftermarket rings often fail prematurely under construction machinery loads.
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Phone: +86 158 2286 3467 |
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