ZF 4657.131.005 FILLER NOZZLE for WG190/WG210 | OEM Genuine Part

Overview

The ZF 4657.131.005 FILLER NOZZLE is a precision-engineered fluid delivery component designed for the WG190 and WG210 series transmissions. This OEM genuine part ensures accurate oil flow into the torque converter and hydraulic control system, directly affecting shift quality and thermal regulation. The SKU 4657.131.005 sits within the upper valve body assembly, directing transmission fluid from the pump to the cooler circuit. When this nozzle becomes clogged or deformed, it disrupts the entire lubrication profile of the unit. For optimal sealing integrity, this filler nozzle is often replaced alongside the 4657101039: TRANSMISSION HOUSING and the 4657201028: HOUS.FRONT SECT during a major overhaul.

Symptoms of Failure

• Torque converter shudder at low speeds: A worn filler nozzle restricts fluid volume, causing the converter clutch to slip under light throttle. This often appears as a “ZF transmission shudder fix” search query.
• External oil seepage near the bell housing: Cracks in the nozzle body allow pressurized ATF to escape, leaving visible drips after parking. This is a common “WG190 oil leak from filler tube” complaint.
• Delayed engagement from Neutral to Drive: Insufficient fluid delivery starves the clutch packs, resulting in a 2-3 second lag. Technicians frequently search for “ZF WG210 slow engagement cause.”
• Overheating transmission under load: A blocked nozzle reduces cooler flow, pushing sump temperatures above 120°C. This symptom is often misdiagnosed as a failed thermostat.

Technical Specifications

Compatibility

This filler nozzle is engineered for ZF’s WG series powershift transmissions, specifically the WG190 and WG210 models. It is also compatible with the WG180 and WG200 variants when used in off-highway applications such as wheel loaders and dump trucks. The nozzle interfaces directly with the 4657201013: HOUSING REAR PART and is secured by a 0631306792: CYLINDRICAL PIN to prevent rotation. Always verify the casting number on your transmission housing before ordering.

Related Components

Frequently Asked Questions

Q: Can I install the 4657.131.005 filler nozzle without removing the transmission?
A: In most WG190/WG210 applications, the nozzle is accessible after removing the bell housing cover. However, on some wheel loader configurations, the oil pan must be dropped. Always consult the service manual for your specific vehicle model.

Q: What is the typical lifespan of this filler nozzle?
A: Under normal operating conditions with regular fluid changes, the nozzle lasts the life of the transmission (8,000-12,000 hours). Premature failure is usually caused by debris from a failing clutch pack or torque converter.

Q: Does this part come with a sealing washer or O-ring?
A: No. The 4657.131.005 is supplied as a bare metal nozzle. We recommend replacing the copper sealing washer (part 0636100801) and the 4656301148: FIXING PLATE simultaneously to ensure a leak-free installation.