Overview
This genuine ZF 4657.131.006 FILLER NOZZLE is a precision-engineered component designed for the lubrication and cooling circuits within the WG160, WG190, and WG210 series transmissions. It serves as the critical entry point for oil flow, directing fluid from the TRANSMISSION HOUSING into the gear train. The SKU 4657.131.006 ensures a tight, leak-free seal under high-pressure operating conditions, maintaining proper hydraulic pressure for clutch engagement and gear lubrication. Without this nozzle, the transmission cannot maintain its required oil volume or pressure, leading to rapid component wear.
Symptoms of Failure
- Oil Leaks at the Filler Nozzle Seal: A worn or cracked 4657.131.006 nozzle will cause transmission fluid to weep from the housing interface, leaving visible drips under the vehicle and reducing oil levels.
- Delayed Gear Engagement or Slipping: When the filler nozzle fails to deliver adequate oil flow, hydraulic pressure drops, causing hesitation when shifting into forward or reverse gears.
- Overheating Transmission: A restricted or broken nozzle starves the cooling circuit, leading to elevated operating temperatures and potential thermal damage to clutches and bearings.
- Whining or Grinding Noises: Insufficient lubrication from a faulty nozzle creates metal-on-metal contact in the gear train, producing audible whining or grinding sounds during acceleration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (OEM) | 4657.131.006 |
| Material | Hardened Steel with Corrosion-Resistant Coating |
| Overall Length | 48 mm (approx.) |
| Thread Size | M14 x 1.5 |
| Weight | 0.12 kg |
| Operating Pressure Range | 10–25 bar |
| OEM Reference | ZF 4657.131.006 |
Compatibility
This filler nozzle is engineered for the ZF WG series of powershift transmissions. It is a direct fit for the WG160, WG190, and WG210 models. Based on its design and thread pattern, it is also compatible with the WG180 and WG200 series transmissions that share the same housing architecture. Always verify the mounting boss on your HOUS.FRONT SECT or HOUSING REAR PART to confirm fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing that encloses all gear sets and shafts |
| 4656201075 | HOUS.FRONT SECT | Forward section of the housing supporting input shaft bearings |
| 4656201036 | HOUSING REAR PART | Rear housing segment that mounts the output flange |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant for specific WG models |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing assembly |
| 4656301148 | FIXING PLATE | Secures the filler nozzle in position against vibration |
| 0636100817 | CAP SCREW | Fastener for mounting the fixing plate to the housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter protecting the nozzle from debris |
| 4656301017 | SCREEN SHEET | Alternate mesh filter with different micron rating |
| 0636100803 | CAP SCREW | Secondary fastener for the rear housing section |
Frequently Asked Questions
Q: Can I install the 4657.131.006 filler nozzle without removing the transmission?
A: Yes, in most WG160 and WG190 applications, the nozzle is accessible from the exterior of the TRANSMISSION HOUSING. You only need to drain the oil and remove the access cover to replace it.
Q: How often should this filler nozzle be replaced?
A: While it is a durable steel component, ZF recommends inspecting the nozzle during any major transmission overhaul (typically every 5,000–8,000 operating hours). Replace it immediately if you notice any cracks or deformation.
Q: Will this part work with the WG210 series?
A: Yes, the 4657.131.006 is listed as compatible with the WG210 series. However, always cross-reference your existing part number against the HOUSING REAR PART configuration to ensure thread compatibility.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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