Overview
The ZF 4657.183.026 LOOSE PARTS kit is a critical service assembly designed for the WG190 and WG210 series transmissions. This genuine OEM part contains the necessary fasteners, seals, and positioning components required to secure internal assemblies within the transmission housing. Specifically, it interfaces directly with the main casing structure, ensuring that the TRANSMISSION HOUSING maintains proper alignment with the HOUS.FRONT SECT and the HOUSING REAR PART. The SKU 4657.183.026 is often ordered during a full rebuild or when addressing vibration issues in the drivetrain, as it replaces all loose hardware that fatigues over time.
Symptoms of Failure
When the components within the ZF 4657.183.026 LOOSE PARTS kit begin to degrade, operators will notice distinct operational issues. Common failure symptoms include:
- Transmission oil weeping from mating surfaces: Worn fasteners or missing locating pins cause gaps between the HOUSING REAR SECTION and the main body, leading to slow oil leaks.
- Gear slipping under load: Loose hardware allows the internal shaft assemblies to shift slightly, causing intermittent gear engagement failure.
- Abnormal metallic rattling: Unsecured loose parts inside the bell housing create a distinct rattle at idle or low RPM.
- Difficult gear engagement: Misalignment caused by degraded locating pins or bolts results in a stiff or notchy shift feel.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.183.026 |
| Material Composition | Steel alloy with zinc-plated fasteners |
| Estimated Weight | 0.85 kg (1.87 lbs) |
| Kit Contents | Bolts, locating pins, washers, and retaining clips |
| OEM Reference | ZF Friedrichshafen AG |
| Associated Fastener | CAP SCREW (M10 x 30mm) |
| Associated Pin | CYLINDRICAL PIN (8mm x 20mm) |
Compatibility
This genuine ZF 4657.183.026 LOOSE PARTS kit is engineered for the WG190 and WG210 transmission series. It is also compatible with the WG180 and WG200 models that share the same housing architecture. The kit is specifically designed to work with the FIXING PLATE and the two SCREEN SHEET variants (4657301032 and 4657301033) that filter debris from the oil circuit. Always verify your transmission’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201168 | HOUSING REAR PART | Rear portion of the main housing |
| 4657298101 | HOUSING REAR SECTION | End cap section for the housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing sections |
| 0636100801 | CAP SCREW | Fastener for securing housing flanges |
| 4656301148 | FIXING PLATE | Retainer plate for internal components |
| 4657301032 | SCREEN SHEET | Oil filter screen (variant 1) |
| 4657301033 | SCREEN SHEET | Oil filter screen (variant 2) |
| 0636100803 | CAP SCREW | Secondary flange fastener |
Frequently Asked Questions
Q: Can I reuse the old bolts from my ZF WG190 instead of buying the 4657.183.026 kit?
A: No. ZF specifies that all fasteners in the LOOSE PARTS kit are single-use torque-to-yield components. Reusing them risks thread fatigue and oil leaks.
Q: Does this kit include the screen sheets for the oil filter?
A: No. The 4657.183.026 kit contains only loose hardware (bolts, pins, washers). The screen sheets must be ordered separately as part numbers 4657301032 and 4657301033.
Q: How do I know if my WG210 needs this specific kit?
A: If you are replacing the HOUS.FRONT SECT or the HOUSING REAR PART, you must install this kit to ensure proper clamping force and alignment.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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