Overview
The ZF 0501.320.419 ORIFICE is a precision-engineered hydraulic flow control component designed to regulate oil pressure and volume within ZF powershift transmissions. Positioned in the valve body or clutch feed circuit, this OEM genuine part ensures consistent lubrication and clutch engagement timing. The SKU 0501.320.419 is a critical metering device that restricts fluid passage to maintain optimal system pressure, preventing cavitation and ensuring smooth gear shifts under heavy loads in construction machinery.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: When the orifice becomes clogged or eroded, transmission response times increase, causing rough or delayed clutch application.
- Transmission oil leaks around the valve body: A worn 0501.320.419 orifice can cause backpressure, leading to seal failure and visible oil seepage near the 4108101158 HOUSING.
- Overheating transmission fluid: Restricted flow from a damaged orifice forces the 0501215907 MOTOR to work harder, generating excess heat and reducing overall efficiency.
- Intermittent power loss under load: A failing orifice starves clutch packs of hydraulic pressure, causing momentary slipping during excavation or lifting operations.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0501.320.419 |
| Material | Hardened steel with corrosion-resistant coating |
| Orifice Diameter | 2.5 mm (0.098 in) |
| Overall Length | 18 mm (0.71 in) |
| Thread Size | M10 x 1.0 |
| Weight | 12 g (0.42 oz) |
| OEM Reference | ZF 0501.320.419 |
Compatibility
This orifice is engineered for ZF WG-series transmissions commonly used in construction machinery, including models WG180, WG200, and WG210. It also fits select 4WG-200 and 6WG-200 variants. The part interfaces directly with the 0501320268 COVER and the 0735370298 ROLLER BEARING assembly, ensuring precise hydraulic metering in the clutch control circuit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101158 | HOUSING | Encloses valve body and directs oil flow |
| 0501215907 | MOTOR | Hydraulic drive motor for pump engagement |
| 0501320268 | COVER | Seals transmission housing and supports bearings |
| 0735370298 | ROLLER BEARING | Reduces friction in rotating shaft assemblies |
| 0501317874 | HOUSING | Secondary housing for clutch pack alignment |
| 0501317875 | ROLLER | Guides cam disc movement during shifting |
| 0501213227 | PISTON | Applies hydraulic pressure to clutch packs |
| 0501317876 | COMPRESSION SPRING | Returns piston to neutral position |
| 0501314823 | BUSH | Wear-resistant sleeve for shaft support |
| 0501314929 | CAM DISC | Controls shift sequence through mechanical timing |
