Overview
The ZF 4646.302.147 CAMPANA DE CONVERTIDOR (Torque Converter Bell Housing) is a critical structural component designed for the WG260 series transmission. This OEM original part encloses and protects the torque converter assembly, ensuring precise alignment between the engine flywheel and the transmission input shaft. The SKU 4646.302.147 serves as the primary mounting interface, absorbing torsional vibrations and maintaining hydraulic pressure integrity within the converter circuit. In construction machinery applications, this bell housing directly connects to the 4646101167: TRANSMISSION HOUSING to form a sealed drivetrain unit, while the 4646301317: HOUSING provides additional structural support for the clutch pack assembly.
Symptoms of Failure
When the 4646.302.147 bell housing deteriorates, operators typically encounter these specific failure modes:
- Torque converter oil leaks at the bell housing seam – Cracks or warping in the casting allow transmission fluid to escape, often visible as drips near the engine-transmission junction.
- Gear slipping under heavy load – Misalignment caused by a damaged bell housing prevents the converter from locking properly, leading to erratic power delivery during excavation or grading.
- Abnormal vibration during converter lockup – A distorted mounting face creates axial play, producing a low-frequency shudder when the converter engages at 1,200–1,800 RPM.
- Difficulty engaging forward or reverse gears – Structural fatigue in the bell housing can shift the converter’s position, causing delayed or harsh gear engagement in WG260 transmissions.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4646.302.147 |
| Material | High-grade cast iron (GGG-40) |
| Weight | 18.5 kg (40.8 lbs) |
| Outer Diameter | 420 mm |
| Bolt Hole Pattern | 12 x M12 on 380 mm PCD |
| OEM Reference | ZF 4646.302.147 (Original) |
| Sealing Surface | Machined flatness ≤ 0.05 mm |
Compatibility
This CAMPANA DE CONVERTIDOR is engineered specifically for ZF’s WG-series powershift transmissions used in heavy construction equipment. It is directly compatible with the following models:
- ZF WG260 – Primary application for wheel loaders and dozers
- ZF WG180 – Fits with adapter plate modifications
- ZF WG200 – Shared bolt pattern for mid-range excavators
- ZF WG310 – Requires verification of pilot bore depth
During installation, always pair this bell housing with new 0636115293: 螺栓 and 0636101153: CAP SCREW to achieve proper torque retention. The 4646201003: POT and 0736300232: 螺栓 are also frequently replaced during bell housing service to prevent fluid contamination.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101167 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4646301317 | HOUSING | Clutch pack support housing |
| 0636115293 | 螺栓 | Bell housing mounting bolt |
| 0636101153 | CAP SCREW | High-strength fastener for housing |
| 4646201003 | POT | Torque converter oil sump |
| 0736300232 | 螺栓 | Converter drain plug bolt |
| 4646164011 | CONTROL UNIT | Electronic shift controller |
| 4644306424 | GEAR SHIFT HOUSING | Manual shift mechanism enclosure |
| 4644306427 | GASKET | Sealing ring for shift housing |
| 0732042025 | COMPRESSION SPRING | Valve return spring in control unit |
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