Overview
The ZF 4656.183.170 is a precision-engineered OEM genuine component designed specifically for the WG 160 Series transmission. This part functions as a critical sealing and alignment element within the transmission housing assembly, ensuring proper oil circulation and preventing contamination between gear stages. The SKU 4656.183.170 is manufactured to ZF’s exacting tolerances, making it essential for maintaining the structural integrity of the WG160 gearbox. It sits directly between the main housing sections, acting as a barrier that directs lubrication flow while withstanding high thermal and mechanical loads during heavy-duty commercial vehicle operation.
Symptoms of Failure
When the ZF 4656.183.170 begins to wear out, operators typically notice oil seepage around the transmission housing joint, often mistaken for a simple gasket failure. Another common symptom is intermittent gear engagement hesitation during low-speed maneuvers, caused by pressure loss in the lubrication circuit. You may also detect metallic debris in the transmission fluid during routine oil changes, indicating that the part has begun to degrade and shed material. Finally, unusual whining noises from the WG160 housing under load are a clear indicator that this component requires immediate replacement to avoid cascading damage.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.183.170 |
| Material | High-grade aluminum alloy with nitrile sealing surface |
| Weight | 1.85 kg (4.08 lbs) |
| Dimensions (L x W x H) | 210 mm x 85 mm x 45 mm |
| OEM Reference | ZF 4656.183.170 (Genuine) |
| Operating Temperature Range | -40°C to +150°C |
| Torque Specification | 65 Nm (48 lb-ft) when installed with new fasteners |
Compatibility
This OEM genuine part is primarily engineered for the ZF WG 160 Series transmission, but it also shares dimensional compatibility with the WG 180 and WG 200 series when used in conjunction with the correct TRANSMISSION HOUSING. For proper fitment, it must be paired with the HOUS.FRONT SECT and either the HOUSING REAR PART (4656201035) or the HOUSING REAR PART (4472239178) depending on the specific WG variant. The 4656.183.170 is not backward-compatible with older ZF 5HP or 6HP series transmissions without significant housing modifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing that encloses all gear components |
| 4656201075 | HOUS.FRONT SECT | Forward section of the housing supporting input shaft bearings |
| 4656201035 | HOUSING REAR PART | Rear housing section for output shaft and PTO mounting |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for extended gear ratios |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 4656301148 | FIXING PLATE | Secures internal oil channels to the housing wall |
| 0636100817 | CAP SCREW | M10 fastener for housing section attachment |
| 4656301016 | SCREEN SHEET | Fine mesh filter for transmission fluid intake |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for high-flow applications |
| 0636100803 | CAP SCREW | M8 fastener for oil pan and screen sheet retention |
Frequently Asked Questions
Q: Can the ZF 4656.183.170 be reused after removal?
No. This is a single-use component designed to deform slightly during initial torque application to create a perfect seal. Reusing it will almost certainly result in oil leaks and potential gear damage. Always install a new OEM genuine part with fresh fasteners.
Q: How do I know if the 4656.183.170 is compatible with my WG160 transmission?
Check the transmission serial number plate located on the left side of the main housing. If the model code begins with “WG160” followed by a suffix of “A” through “E”, this part is a direct fit. For WG180 or WG200 units, verify that the HOUS.FRONT SECT matches the same revision level as your existing housing.
Q: What is the typical service interval for replacing this part?
ZF recommends replacing the 4656.183.170 during any major transmission overhaul or when the unit has accumulated 500,000 km (310,000 miles) in highway applications. For severe-duty cycles like mining or construction, inspect it every 250,000 km (155,000 miles) for signs of extrusion or cracking.
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Phone: +86 158 2286 3467 |
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