Overview
The ZF 4657.131.012 FILLER NOZZLE is a precision-engineered fluid delivery component designed exclusively for the WG 210 series transmission. This OEM genuine part serves as the primary interface for introducing transmission oil into the hydraulic system, ensuring a controlled and debris-free fill path. Positioned directly on the upper housing assembly, the filler nozzle (SKU: 4657.131.012) directs fluid into the main sump while preventing backflow and contamination. It integrates seamlessly with the 4657101033: TRANSMISSION HOUSING and the 4657201027: HOUS.FRONT SECT to maintain proper lubrication flow under high-torque conditions.
Symptoms of Failure
- Transmission fluid seepage around the fill port: A worn or cracked filler nozzle allows oil to escape, leaving visible puddles beneath the vehicle. This is a common “ZF WG210 oil leak” indicator.
- Erratic gear engagement or delayed shifting: When the nozzle fails to seal, air enters the hydraulic circuit, causing “transmission slipping at low speeds” and inconsistent clutch pack pressure.
- Contaminated fluid or debris in the sump: A degraded nozzle can break down internally, introducing plastic or rubber fragments into the oil. This triggers “transmission filter clogging” warnings and reduces overall efficiency.
- Difficulty achieving proper fluid level during service: A deformed filler neck prevents accurate filling, leading to “overfilled transmission symptoms” or chronic low-oil conditions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.131.012 |
| Material | Glass-reinforced nylon (PA66-GF30) |
| Overall Length | 142 mm |
| Inlet Diameter | 28 mm |
| Outlet Diameter | 18 mm |
| Weight | 0.085 kg |
| OEM Reference | ZF 4657.131.012 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This filler nozzle is engineered for the ZF WG 210 series transmissions, including the WG210, WG211, and WG212 variants. It also retrofits to earlier WG180 and WG200 models when used with the appropriate 4657201012: HOUSING REAR PART and 0631306792: CYLINDRICAL PIN for alignment. Always verify your transmission serial number before ordering to ensure a perfect fit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4657201027 | HOUS.FRONT SECT | Front section housing the torque converter and pump |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft and bearings |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retaining plate for nozzle and sensor brackets |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil inlet protection |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for debris exclusion |
| 0636100803 | CAP SCREW | High-tensile bolt for nozzle flange attachment |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil supply housing for lubrication circuit |
Frequently Asked Questions
Q: Can I use the ZF 4657.131.012 filler nozzle on a WG200 transmission?
A: Yes, this nozzle is compatible with WG200 models when paired with the correct housing adapter. We recommend also inspecting the 4657201012: HOUSING REAR PART for any wear during installation.
Q: How do I know if my filler nozzle is causing low transmission pressure?
A: Check for visible cracks or deformation around the nozzle neck. If you notice oil residue on the 4657101033: TRANSMISSION HOUSING near the fill port, replacement is necessary.
Q: What is the torque specification for the cap screws securing this nozzle?
A: Use 25 Nm for the 0636100803: CAP SCREW fasteners. Over-tightening can crack the nozzle flange.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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