ZF 4657.183.102 LOOSE PARTS for WG190 | OEM Genuine Part

Overview

Within the intricate architecture of the ZF WG 190 series transmission, the ZF 4657.183.102 LOOSE PARTS kit serves as a critical consolidation of internal fasteners and positioning components. This OEM genuine part, identified by SKU 4657.183.102, is specifically designed to secure the main housing assemblies and internal screens against the high-torque vibrations inherent in heavy-duty operations. It functions as the retention hardware that mates the TRANSMISSION HOUSING to the HOUS.FRONT SECT, ensuring the entire drivetrain assembly remains rigid under load. Without this precise collection of loose parts, the structural integrity of the gear train is compromised, leading to misalignment and accelerated wear.

Symptoms of Failure

When the components within the 4657.183.102 kit begin to degrade or are lost during service, operators will notice distinct operational anomalies. The most common failure symptoms include:

• Oil seepage at housing joints: Worn or missing fasteners from this kit cause the HOUSING REAR PART to separate slightly, allowing transmission fluid to weep under pressure.
• Intermittent gear slippage under load: A loose CYLINDRICAL PIN within the assembly allows the shift rail to float, causing delayed or missed gear engagements.
• Metallic rattling from the bell housing: Unsecured screen sheets and fixing plates vibrate against the housing walls, creating a distinct chatter that intensifies with engine RPM.
• Hard shifting or gear lockout: If the cap screws in this kit back out, the front section housing can shift axially, binding the selector forks.

Technical Specifications

Compatibility

This OEM genuine loose parts kit is engineered primarily for the ZF WG 190 Series transmission family. Based on the structural design of the retention hardware, it is also compatible with the closely related WG 180 and WG 200 models, which share the same housing bolt pattern and pin alignment geometry. It is not recommended for use in the older WG 160 series without verifying the TRANSMISSION HOUSING flange dimensions. Always cross-reference your existing hardware against the HOUSING REAR PART mating surface to ensure a proper seal.

Related Components

Frequently Asked Questions

Q: Can I reuse the old cap screws from my previous rebuild instead of buying the 4657.183.102 kit?
A: It is not recommended. The fasteners in this OEM genuine kit are torque-to-yield components. Reusing old hardware, especially the CAP SCREW (0636100801), can lead to insufficient clamping force and eventual oil leaks at the HOUS.FRONT SECT interface.

Q: Does this kit include the screen sheets for the oil filter cavity?
A: No. The 4657.183.102 kit focuses on loose hardware (pins, screws, plates). The screen sheets are separate components, specifically part numbers 4657301032 and 4657301033, which must be ordered individually.

Q: How do I verify that the cylindrical pin (0631306792) is correctly seated?
A: The pin should be flush with the mating face of the TRANSMISSION HOUSING. If it protrudes or is recessed more than 0.5mm, the HOUSING REAR PART will not align properly, causing premature bearing failure.