Overview
The ZF 4656.183.344 is a precision-engineered component designed specifically for the WG 160 series transmission. This OEM genuine part plays a critical role in maintaining hydraulic pressure integrity and gear alignment within the transmission’s valve body assembly. As a wear-sensitive element, the SKU 4656.183.344 ensures consistent oil flow regulation, directly impacting shift quality and clutch engagement. When installed alongside the TRANSMISSION HOUSING, it forms a sealed circuit that prevents cross-contamination between lubrication channels.
Symptoms of Failure
- Delayed gear engagement: A worn 4656.183.344 often causes a 2-3 second lag when shifting from Neutral to Drive, especially under cold start conditions.
- Erratic shift pressure: Operators may notice harsh upshifts or flaring between gears due to inconsistent hydraulic damping from this part.
- External oil seepage: Cracks or deformation in the component lead to visible drips near the valve body cover, often mistaken for a gasket failure.
- Transmission overheating: Restricted oil flow through a degraded 4656.183.344 forces the torque converter to work harder, raising sump temperatures by 15-20°F.
Technical Specifications
| Part Number | 4656.183.344 |
| Material | Hardened steel with zinc-nickel coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions | 85 mm x 42 mm x 28 mm |
| OEM Reference | ZF 4656.183.344 |
| Torque Rating | 120 Nm max |
| Operating Temperature | -40°C to +120°C |
Compatibility
This OEM genuine part is engineered for the ZF WG 160 series, but its design principles extend to several other ZF commercial transmissions. It is directly compatible with the WG 180 and WG 200 models, provided the HOUS.FRONT SECT and HOUSING REAR PART are from the same generation. The part also fits the WG 150 and WG 210 series when paired with the HOUSING REAR SECTION adapter kit. Always verify your transmission’s serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train alignment |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and valve body |
| 4656201077 | HOUSING REAR PART | Rear housing supporting output shaft bearings |
| 4656298049 | HOUSING REAR SECTION | Adapter section for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 4656301148 | FIXING PLATE | Retains valve body components in position |
| 0636100817 | CAP SCREW | M10 bolt for securing housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for pump intake |
| 0636100803 | CAP SCREW | M8 bolt for valve body attachment |
Frequently Asked Questions
Q: Can the 4656.183.344 be reused after a transmission rebuild?
A: No. This OEM part is a single-use component due to its crush-ring sealing design. Reusing it will cause internal pressure loss and eventual clutch slippage.
Q: How does this part interact with the HOUSING REAR SECTION?
A: The 4656.183.344 mounts directly onto the HOUSING REAR SECTION via two locating pins, creating a sealed gallery for governor pressure feedback.
Q: What torque specification is required for installation?
A: Tighten the retaining bolts to 25 Nm in a cross-pattern sequence. Over-torquing can distort the part and cause premature failure.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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