Overview
The ZF 0730.361.077 ORIFICE is a precision-machined hydraulic flow restrictor engineered specifically for the WG 65 series transmission. This OEM genuine component regulates oil pressure and flow within the valve body assembly, ensuring precise clutch and brake application timing. The SKU 0730.361.077 is a critical metering device that maintains proper lubrication and cooling circuits, directly influencing shift quality and thermal stability. When installed alongside the 4616105413 OUTPUT shaft assembly, this orifice ensures consistent hydraulic response under varying load conditions.
Symptoms of Failure
- Erratic shift timing or delayed engagement: A worn or clogged 0730.361.077 orifice disrupts hydraulic pressure curves, causing harsh or slipping gear changes.
- Transmission overheating: Restricted oil flow through the orifice reduces cooling capacity, leading to elevated sump temperatures during operation.
- Intermittent loss of drive in forward gears: Debris accumulation in the orifice can starve clutch packs of pressure, resulting in temporary power loss.
- Audible whining or buzzing from valve body: Cavitation caused by improper flow restriction generates high-frequency noise through the 4616101117 TRANSMISSION HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0730.361.077 |
| Material | Hardened steel (C45E) with zinc-nickel plating |
| Orifice Diameter | 2.5 mm ± 0.05 mm |
| Overall Length | 18.0 mm |
| Hex Size | 12 mm (AF) |
| Weight | 12 g |
| OEM Reference | ZF 0730.361.077 |
| Thread Pitch | M10 x 1.0 |
| Sealing Method | Integrated O-ring groove (compatible with 0634313118 O-RING) |
Compatibility
This orifice is a direct-fit component for the ZF WG 65 series transmissions, including models WG65, WG80, WG120, WG150, WG180, and WG200. It is also used in certain ZF Ecomat 4HP and 5HP variants that share the WG65 valve body architecture. The 0730.361.077 works in conjunction with the 4616203017 OUTPUT FLANGE and 0636011038 HEXAGON SCREW to maintain hydraulic integrity during high-torque applications. Always verify your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from planetary gearset to driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to driveline components |
| 4616101117 | TRANSMISSION HOUSING | Encloses gear train and hydraulic circuits |
| 0636011038 | HEXAGON SCREW | Secures valve body to housing |
| 0636016015 | HEXAGON SCREW | Fastens oil pan to transmission |
| 0631306085 | CYLINDRICAL PIN | Aligns valve body components |
| 0634313118 | O-RING | Seals orifice bore against leakage |
| 0732611049 | FILTER INSERT | Traps debris before hydraulic circuits |
| 0634303718 | O-RING | Seals output flange connection |
| 0636610082 | STUD | Provides threaded mounting for bellhousing |
