Overview
This genuine OEM ZF 4657.183.256 LOOSE PARTS kit is a critical service component designed for the WG 211 series transmission. It functions as a collection of essential hardware and small components that secure and align internal assemblies within the gearbox. Specifically, this kit ensures the correct positioning of the HOUS.FRONT SECT and the HOUSING REAR PART during reassembly. The SKU 4657.183.256 is a direct replacement for the original factory loose parts bundle, guaranteeing a precise fit and preventing premature wear on the main TRANSMISSION HOUSING.
Symptoms of Failure
When the components within this loose parts kit degrade or are lost, several distinct operational issues emerge. Watch for these specific failure symptoms:
- Transmission housing misalignment: If the CYLINDRICAL PIN wears, the front and rear housing sections can shift, causing gear engagement problems.
- Oil seepage at mating flanges: A compromised or missing fixing plate from this kit leads to uneven clamping pressure, resulting in slow oil leaks around the housing joint.
- Rattling or loose internal hardware: Missing cap screws or screen sheets create audible vibration and can lead to debris circulating inside the transmission.
- Erratic shifting under load: Incorrectly positioned loose parts prevent the valve body from receiving proper hydraulic feedback, causing delayed or harsh shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.183.256 |
| Kit Contents | Fixing plates, cap screws, cylindrical pins, screen sheet |
| Material Composition | Steel (hardened), zinc-plated fasteners |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4657.183.256 |
| Thread Pitch (Cap Screws) | M8 x 1.25 (typical) |
Compatibility
This genuine loose parts kit is engineered primarily for the WG 211 Series transmission. Based on the part architecture, it is also compatible with the following ZF models: WG180, WG200, and WG210. It is not recommended for use in the older WG120 series without verifying housing bolt patterns. Always confirm that your transmission housing matches the TRANSMISSION HOUSING dimensions before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657301130 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of the transmission housing |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing sections |
| 0636102489 | CAP SCREW | Fastener for housing attachment |
| 4656301148 | FIXING PLATE | Secures internal components in place |
| 0636102463 | CAP SCREW | Fastener for valve body or cover |
| 4657201133 | SCREEN SHEET | Filter screen for hydraulic fluid |
| 0636115287 | CAP SCREW | Fastener for screen sheet retention |
| 4657301065 | PLATE | Spacer or wear plate for clutch pack |
Frequently Asked Questions
Q: Can I reuse the old cap screws from my WG211 when installing this kit?
A: No. The 4657.183.256 kit includes new cap screws and pins because OEM fasteners are torque-to-yield and lose clamping force after removal. Always replace them to avoid housing leaks.
Q: Does this kit include the screen sheet for the oil filter?
A: Yes, the kit contains the SCREEN SHEET (part 4657201133) as a standard component. Ensure it is properly seated to prevent debris from entering the hydraulic circuit.
Q: Will this work on a ZF WG180 transmission built before 2005?
A: Yes, the WG180, WG200, and WG210 share the same housing bolt pattern. However, verify that your TRANSMISSION HOUSING has not been modified with aftermarket dowel pins.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
