Overview
The ZF 4699.305.008 CENTERING RING is a precision-machined OEM genuine component engineered to ensure exact axial alignment within the rotating assembly of heavy-duty construction machinery transmissions. This ring sits between the torque converter housing and the main gear case, acting as a critical locator to maintain concentricity between the pump drive and the input shaft. The SKU 4699.305.008 is manufactured to ZF’s strict tolerances, preventing radial runout that can lead to premature bearing wear. When paired with the 4699101002: HOUSING and the 4699301188: HOUSING, this centering ring guarantees a repeatable, vibration-free interface for the entire driveline.
Symptoms of Failure
- Transmission misalignment noise: A low-frequency hum or knocking sound from the bell housing area, especially during acceleration or load changes, indicates the centering ring has worn beyond its service limit.
- Oil seepage at the housing joint: When the centering ring loses its tight fit, the mating surfaces between the 4699301128: COVER and the main housing can separate slightly, allowing ATF to weep out.
- Vibration through the chassis: A worn 4699.305.008 allows the torque converter to wobble, transmitting harsh vibrations into the frame that are often misdiagnosed as engine issues.
- Premature seal failure: Misalignment caused by a degraded centering ring puts lateral stress on the input shaft seal, leading to repeated leaks even after seal replacement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (OEM) | 4699.305.008 |
| Outer Diameter (approx.) | 168 mm |
| Inner Diameter (approx.) | 145 mm |
| Thickness | 8.5 mm |
| Material | Hardened alloy steel (C45E) |
| Surface Treatment | Zinc-nickel plated (corrosion resistant) |
| Weight | 0.42 kg |
| OEM Reference | ZF 4699.305.008 |
| Fastener Torque Spec | Use 0636015047: HEXAGON SCREW (M10 x 30, 45 Nm) |
Compatibility
This centering ring is designed for ZF’s heavy-duty powershift transmission series used in wheel loaders, dozers, and graders. It is a direct fit for the WG180, WG200, and WG211 models. It also applies to select 4WG-200 and 6WG-200 variants where the torque converter housing bolts directly to the gear case. Always verify the housing casting number before installation; the ring seats into a counterbore on the 4699101002: HOUSING and is retained by the 0636015047: HEXAGON SCREW set.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101002 | HOUSING | Main torque converter housing |
| 4699301188 | HOUSING | Intermediate gear case housing |
| 4699301128 | COVER | Access cover for clutch pack |
| 0636015047 | HEXAGON SCREW | M10 bolt for centering ring retention |
| 0734307406 | SEALING RING | O-ring for housing joint seal |
| 0501319149 | SCREW PLUG | Oil drain plug for housing |
| 0634801038 | SEALING RING | Copper washer for plug seal |
| 0636101041 | CAP SCREW | M12 bolt for cover fastening |
| 0636101036 | CAP SCREW | M10 bolt for housing flange |
| 0636101032 | CAP SCREW | M8 bolt for accessory bracket |
