Overview
The ZF 0635.302.019 AXIAL NEEDLE CAGE is a precision-engineered component designed for the WG 94 series of heavy-duty transmissions. This OEM genuine part functions as a low-friction bearing element, reducing axial play between rotating shafts and stationary housings within the gear train. Installed directly inside the TRANSMISSION HOUSING, the needle cage supports high radial loads while allowing smooth axial movement during clutch engagement and gear shifts. The SKU 0635.302.019 is manufactured to ZF’s exacting tolerances, ensuring minimal wear under continuous high-torque operation in construction and agricultural machinery.
Symptoms of Failure
- Persistent transmission oil leaks around the output shaft seal: A worn axial needle cage allows shaft wobble, damaging the seal lip and causing fluid seepage.
- Gear slipping under load or during uphill operation: Excessive axial clearance from a collapsed cage reduces clutch pack clamping force, leading to power loss.
- Metallic grinding or whining noise from the transmission housing: Broken needle rollers create debris that scores the HOUSING II and adjacent gear surfaces.
- Hard shifting or delayed engagement in forward/reverse gears: Increased friction from a deformed cage prevents proper shaft alignment, causing shift hesitation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0635.302.019 |
| Component Type | Axial Needle Cage |
| Inner Diameter (ID) | 35 mm (estimated) |
| Outer Diameter (OD) | 55 mm (estimated) |
| Width / Thickness | 8 mm (estimated) |
| Material | Case-hardened steel with polymer cage |
| Weight | 0.12 kg (0.26 lbs) |
| OEM Reference | ZF 0635.302.019 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This axial needle cage is a direct fit for ZF WG 94 series transmissions, including models WG94, WG120, WG150, WG180, and WG200. It is commonly used in off-highway vehicles such as wheel loaders, dump trucks, and forklifts. The part interfaces with the TUBE for oil distribution and is secured by the CYLINDRICAL PIN to prevent rotation. Always verify your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101018 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4661301050 | HOUSING II | Secondary housing for clutch pack support |
| 4661301093 | TUBE | Oil feed channel for lubrication |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for component positioning |
| 0769123894 | TYPE PLATE | Identification tag with serial number |
| 0750100022 | SCREW PLUG | Sealing plug for oil passages |
| 0636302602 | SCREW PLUG | Drain or fill port plug |
| 0634100633 | O-RING | Hydraulic seal between mating surfaces |
| 4661301029 | NOZZLE | Oil spray nozzle for gear cooling |
| 4661301027 | NOZZLE | Secondary oil jet for bearing lubrication |

