Overview
The ZF 4475.280.056 SCREW-IN SLEEVE is a precision-engineered OEM genuine component designed for the WG 210 series transmission. This threaded sleeve serves as a critical sealing and alignment interface within the transmission housing, ensuring that hydraulic pressure is maintained and rotating assemblies remain properly positioned. As an integral part of the lubrication circuit, the 4475.280.056 screw-in sleeve prevents contamination ingress and fluid bypass. When paired with a 5838109012: DIFFERENTIAL, this sleeve supports the precise oil flow required for smooth gear engagement under heavy loads.
Symptoms of Failure
- Transmission fluid seepage at the housing joint: A worn or cracked screw-in sleeve often causes slow oil drips around the WG210 casing, leading to low fluid levels and eventual overheating.
- Erratic gear engagement or delayed shifting: When the 4475.280.056 sleeve loses its sealing integrity, hydraulic pressure drops, resulting in sluggish clutch pack actuation and harsh shifts.
- Metallic debris in the oil pan: A failing sleeve can fracture under vibration, sending small metal fragments into the sump. This symptom frequently accompanies wear in the 0750117075: TAPER ROLLER BEARING.
- Whining noise from the transmission housing: Loss of sleeve rigidity allows misalignment of the 2093209023: DIFFERENTIAL, producing a high-pitched whine during acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4475.280.056 |
| Product Type | Screw-In Sleeve |
| Material | Case-Hardened Alloy Steel |
| Thread Pitch | M36 x 1.5 |
| Overall Length | 48 mm |
| Hex Size | 24 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4475.280.056 |
| Sealing Surface | Ground & Nitrided |
Compatibility
This genuine ZF screw-in sleeve is primarily designed for the WG 210 series, but it also fits select models in the WG180, WG200, and WG250 families. It is commonly used in off-highway vehicles, agricultural tractors, and industrial powertrains where the 5838300626: DIFFERENTIAL HOUSING shares the same port geometry. Always verify your transmission serial number against the ZF parts catalog to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | Differential | Distributes torque between axles |
| 0750117075 | Taper Roller Bearing | Supports radial and axial loads |
| 2093209023 | Differential | Secondary torque distribution unit |
| 5838300626 | Differential Housing | Encloses differential gears |
| 0631329088 | Spring Pin | Locks sleeve in position |
| 5838300811 | Thrust Washer | Reduces axial friction |
| 5838300721 | Axle Bevel Gear | Transfers power to wheel hubs |
| 5838300633 | Axle | Rotational shaft component |
| 5838300753 | Thrust Washer | Spacer for gear alignment |
| 5838300818 | Thrust Washer | Wear surface for differential |
Frequently Asked Questions
Q: Can the 4475.280.056 sleeve be reused after removal?
No. This is a single-use component due to thread deformation and seal compression. Always install a new OEM sleeve to prevent leaks.
Q: What torque should be applied during installation?
ZF specifies 85 Nm for the 4475.280.056 screw-in sleeve. Over-torquing can crack the differential housing.
Q: Does this part require a specific sealant?
Yes. Use ZF-approved anaerobic thread locker (Loctite 243 equivalent) on the threads to ensure hydraulic integrity.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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