Overview
The ZF 4657.183.227 LOOSE PARTS kit is a critical service package designed specifically for the WG 211 Series transmission. This assembly contains the essential fasteners, seals, and positioning components required to secure the main transmission housing sections during a rebuild or major repair. The SKU 4657.183.227 ensures that all loose hardware—including bolts, pins, and locating plates—are replaced as a matched set, preventing misalignment and oil migration between the gear train compartments. This part sits directly at the interface between the HOUS.FRONT SECT and the HOUSING REAR PART, acting as the mechanical lock that maintains structural integrity under high torque loads.
Symptoms of Failure
- External oil seepage at the main case split line: When the loose hardware fatigues, the clamping force between the TRANSMISSION HOUSING and the rear section diminishes, leading to visible fluid weeping.
- Intermittent gear engagement hesitation: Worn or missing CYLINDRICAL PIN components allow micro-shifting of the housing halves, causing misalignment of shift rails.
- Abnormal vibration during 3rd-4th gear shifts: Loose fasteners permit flex in the housing structure, transmitting harmonic vibrations through the driveline.
- Increased metallic debris in the oil pan: Fretting wear from loose plates and screws generates fine steel particles that contaminate the hydraulic circuit.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.183.227 |
| Material Composition | Case-hardened steel (fasteners) / Zinc-plated carbon steel (plates) |
| Total Kit Weight | 0.85 kg (1.87 lbs) |
| Fastener Torque Spec | 45 Nm ± 5 Nm (dry) |
| OEM Reference | ZF Friedrichshafen AG |
| Kit Contents | 6x cap screws, 2x cylindrical pins, 1x fixing plate, 1x screen sheet |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG 211 Series transmission family. It is also directly compatible with the WG180, WG200, and WG210 models that share the same split-housing architecture. The kit is essential when servicing units equipped with the HOUS.FRONT SECT and HOUSING REAR PART castings. Always verify the housing serial number against the TRANSMISSION HOUSING to confirm fitment before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Forward section of the split housing |
| 4657301131 | HOUSING REAR PART | Rear section of the split housing |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636102489 | CAP SCREW | M10 x 30mm housing bolt |
| 4656301148 | FIXING PLATE | Locating bracket for shift mechanism |
| 0636102463 | CAP SCREW | M8 x 25mm plate fastener |
| 4657201133 | SCREEN SHEET | Oil filter mesh for sump |
| 0636115287 | CAP SCREW | M12 x 40mm high-torque bolt |
| 4657301065 | PLATE | Reinforcement plate for rear housing |
Frequently Asked Questions
Q: Can I reuse the original fasteners from my old housing instead of buying this kit?
A: ZF engineering recommends against reusing stretch-type fasteners. The 4657.183.227 kit includes new torque-to-yield cap screws that ensure proper clamping force. Reusing old hardware risks joint separation under load.
Q: Does this kit include the gaskets or sealant for the housing split line?
A: No. This LOOSE PARTS kit contains only the metal components (screws, pins, plates, and screen sheet). You must purchase a separate gasket kit or anaerobic sealant for the mating surfaces of the HOUS.FRONT SECT and HOUSING REAR PART.
Q: How do I verify that part 4657.183.227 fits my WG211 transmission?
A: Check the casting number on the TRANSMISSION HOUSING. If the last four digits match 211, 200, or 180, this kit is compatible. For units with a serial prefix “WG,” the CYLINDRICAL PIN diameter must be verified at 8mm.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
