Overview
The ZF 4657.131.003 FILLER NOZZLE is a precision-engineered fluid delivery component designed exclusively for the WG190 and WG210 series transmissions. This OEM genuine part ensures accurate oil flow into the torque converter and hydraulic control unit during assembly and service. Positioned at the upper port of the TRANSMISSION HOUSING, the filler nozzle directs lubricant to critical bearing surfaces while preventing contamination ingress. The SKU 4657.131.003 is manufactured to ZF’s original tolerances, guaranteeing a leak-free seal and consistent fill rates across all operating temperatures.
Symptoms of Failure
- Transmission fluid pooling under the bell housing: A worn filler nozzle O-ring or cracked plastic body allows oil to escape, often misdiagnosed as a main seal leak.
- Delayed gear engagement after cold starts: Insufficient fluid volume reaching the valve body due to nozzle blockage causes sluggish shifts in WG190 and WG210 units.
- Whining noise from the torque converter area: Air ingestion through a degraded nozzle seat creates cavitation, producing a high-pitched sound during acceleration.
- Overheating during heavy load operation: Restricted oil flow from a deformed nozzle reduces cooling capacity, triggering thermal warnings on ZF-equipped machinery.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Glass-filled nylon PA66 |
| Overall Length | 68.5 mm |
| Seal Diameter | 22.3 mm (inner) / 28.1 mm (outer) |
| Weight | 0.042 kg |
| OEM Reference | ZF 4657.131.003 |
| Operating Temperature Range | -40°C to +120°C |
| Thread Type | M18 x 1.5 (metric fine) |
Compatibility
This filler nozzle is engineered for ZF’s WG series powershift transmissions, specifically the WG180, WG190, WG200, and WG210 models. It replaces the earlier 4657.131.001 variant and is backward-compatible with all housing revisions using the HOUS.FRONT SECT and HOUSING REAR PART assemblies. Always verify the CYLINDRICAL PIN alignment before installation to prevent cross-threading.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing for gear cluster |
| 4657201027 | HOUS.FRONT SECT | Front section housing the pump and converter |
| 4657201020 | HOUSING REAR PART | Rear section supporting output shaft bearings |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M10 fastener for nozzle retention |
| 4656301148 | FIXING PLATE | Locks nozzle orientation during operation |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M8 fastener for screen sheet retention |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
Frequently Asked Questions
Q: Can I use the 4657.131.003 nozzle on a WG180 transmission?
A: Yes, this nozzle is fully compatible with WG180, WG190, WG200, and WG210 models. The mounting flange and thread pitch are identical across all four series.
Q: What torque specification should I use for the retaining cap screw?
A: Tighten the M10 cap screw (part 0636100801) to 35 Nm using a thread-locking compound. Over-torquing can crack the nylon nozzle body.
Q: How do I distinguish a failing filler nozzle from a bad pump seal?
A: A nozzle leak typically appears as a slow drip directly below the fill port, while a pump seal failure causes oil to spray from the converter housing under pressure. Inspect the nozzle bore for cracks or deformation.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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