Overview
The ZF 4472.298.224 连接壳体 (Connecting Housing) is a critical structural component within the transmission assembly, specifically engineered to bridge the main gearbox housing to the torque converter or engine bellhousing. This genuine OEM part, identified by SKU 4472.298.224, serves as the primary load-bearing interface that aligns the input shaft and ensures precise concentricity between rotating assemblies. Constructed from high-strength cast iron, it absorbs torsional vibrations and maintains oil-tight sealing under extreme hydraulic pressures. Without this housing, the transmission cannot maintain its structural integrity, leading to immediate operational failure in heavy construction machinery.
Symptoms of Failure
When the ZF 4472.298.224 connecting housing degrades, operators will notice distinct performance issues. Look for these specific failure indicators:
- Chronic oil seepage at the bellhousing joint: Worn mating surfaces or micro-cracks in the housing cause transmission fluid to weep externally, leaving visible drips on the undercarriage after shutdown.
- Audible knocking or clunking during gear engagement: A fractured housing allows the input shaft to shift out of alignment, producing metallic impact sounds when shifting from neutral to drive or reverse.
- Progressive gear slipping under load: Distortion of the housing bore reduces hydraulic pressure to the clutch packs, causing the transmission to slip when climbing grades or moving heavy loads.
- Vibration through the chassis at idle: A cracked housing fails to dampen engine harmonics, transmitting excessive vibration into the cab floor and operator seat.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4472.298.224 |
| Material | GJL-250 Gray Cast Iron (Heat-Treated) |
| Overall Length | 285 mm |
| Mounting Bolt Pattern | 8 x M12 on 180 mm PCD |
| Weight | 6.8 kg (15.0 lbs) |
| OEM Reference | ZF 4472.298.224 (Genuine) |
| Seal Surface Hardness | HRC 45-50 |
Compatibility
This 4472.298.224 connecting housing is designed for integration with ZF’s heavy-duty powershift transmission series commonly deployed in construction machinery. It is a direct fit for the following ZF transmission models:
- ZF WG180 series (all variants including WG180-2, WG180-3)
- ZF WG200 series (WG200-1, WG200-2, WG200-3)
- ZF WG210 series (limited to early production units with 8-bolt bellhousing pattern)
- ZF 4WG-200 and ZF 5WG-200 modular transmissions
Always verify the bolt pattern and dowel pin alignment before installation. This part is not compatible with WG120 or WG150 series housings.
