Overview
The ZF 4660.306.174 NOZZLE is a precision-engineered fluid metering component designed for the hydraulic control circuits within ZF WG200, WG92, and WG98 series transmissions. This OEM genuine part directs pressurized oil to specific clutch packs and valve bodies, ensuring correct shift timing and lubrication flow. As a critical element of the transmission’s hydraulic network, the nozzle (SKU: 4660.306.174) works in concert with the 4660198001 PERIPHERALS assembly to maintain consistent line pressure. Its placement within the valve body gallery makes it essential for modulating fluid delivery to the 0501209818 RANGE SELECTOR mechanism, directly influencing gear engagement quality.
Symptoms of Failure
- Erratic shift timing and gear hunting: A worn or clogged 4660.306.174 nozzle disrupts oil flow, causing delayed or harsh shifts, particularly under load.
- Low transmission oil pressure warnings: Internal leakage past the nozzle reduces system pressure, triggering dashboard alerts or diagnostic trouble codes.
- Oil seepage from valve body area: Cracks or deformation in the nozzle body allow pressurized fluid to escape, leaving visible drips on the 4660101011 TRANSMISSION HOUSING.
- Slipping in forward or reverse gears: Insufficient hydraulic force from a failing nozzle prevents clutch packs from fully engaging, resulting in power loss.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (OEM) | 4660.306.174 |
| Material | Hardened steel with anti-corrosion coating |
| Overall Length | 28.5 mm |
| Outer Diameter | 12.0 mm |
| Orifice Diameter | 1.8 mm |
| Weight | 22 grams |
| OEM Reference | ZF 4660.306.174 |
| Sealing Method | O-ring groove (uses 0634100317 O-RING) |
| Fastener Torque | 8 Nm (via 0636103273 CAP SCREW) |
Compatibility
This nozzle is engineered for ZF WG series transmissions with hydraulic shift control. Verified compatible models include the WG180, WG200, WG92, and WG98 series. It also integrates with the 4660301018 HOUSING assembly in later production runs. For installations requiring a secure seal, pair this nozzle with the 0631306174 CYLINDRICAL PIN and the 4660221012 SUCTION TUBE to ensure complete hydraulic circuit integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Hydraulic control assembly |
| 0501209818 | RANGE SELECTOR | Gear range actuator |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing |
| 4660301018 | HOUSING | Valve body enclosure |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel |
| 0769123894 | TYPE PLATE | Identification label |
| 4660221012 | SUCTION TUBE | Oil intake conduit |
| 0634100317 | O-RING | Hydraulic seal |
| 0636103273 | CAP SCREW | Fastening bolt |
| 0750100022 | SCREW PLUG | Port closure |
