ZF 4656.056.117 for WG160 | OEM Genuine Part

Overview

The ZF 4656.056.117 is a precision-engineered OEM genuine component specifically designed for the WG 160 Series transmission. This part serves as a critical internal guide and sealing element within the hydraulic control system, ensuring precise oil flow regulation during gear shifts. As an original ZF part, the SKU 4656.056.117 guarantees exact fitment and long-term durability, directly contributing to the transmission’s overall shift quality and thermal management. It is installed within the main valve body assembly, working in conjunction with the TRANSMISSION HOUSING to maintain proper hydraulic pressure.

Symptoms of Failure

When the ZF 4656.056.117 begins to wear, operators often notice specific performance declines. Common failure symptoms include:

• Delayed or harsh shifting – Worn internal surfaces cause erratic hydraulic pressure, leading to rough engagement between gears.
• Intermittent gear slipping under load – A failing part cannot maintain consistent oil flow, causing the transmission to lose torque during acceleration.
• Visible oil seepage around the valve body – Degraded sealing surfaces allow transmission fluid to escape, often seen as drips near the housing joint.
• Erratic neutral-to-drive engagement – The component’s inability to regulate pilot pressure results in unpredictable start-up behavior.

Technical Specifications

Parameter	Specification
OEM Part Number	4656.056.117
Material	Hardened alloy steel with anti-corrosion coating
Weight	0.45 kg (approx.)
Dimensions (L x W x H)	85 mm x 40 mm x 25 mm
Surface Finish	Ground and polished
Operating Temperature Range	-40°C to +120°C
OEM Reference	ZF 4656.056.117 (Genuine)

Compatibility

This genuine ZF part is primarily engineered for the WG 160 Series transmission family. Based on its design and hydraulic routing, it is also compatible with the following ZF models that share the same valve body architecture: WG 180, WG 200, and WG 150 series. For optimal performance, always verify the part number against your transmission’s serial plate. The component interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed hydraulic circuit.

Related Components

For a complete rebuild or inspection of your WG 160 assembly, consider these companion parts that are often replaced simultaneously:

Part Number	Name	Function
4656101038	TRANSMISSION HOUSING	Main structural casing for gear and valve assembly
4656201075	HOUS.FRONT SECT	Front section housing for input shaft and pump
4656201037	HOUSING REAR PART	Rear housing section supporting output shaft
4472239180	HOUSING REAR PART	Alternate rear housing variant for specific models
0631306816	CYLINDRICAL PIN	Alignment pin for precise housing positioning
4656301148	FIXING PLATE	Retains valve body components in place
0636100817	CAP SCREW	High-tensile fastener for housing joints
4656301016	SCREEN SHEET	Fine mesh filter for hydraulic fluid
4656301017	SCREEN SHEET	Alternate mesh filter for high-flow circuits
0636100803	CAP SCREW	Fastener for valve body attachment

Frequently Asked Questions

Q: Can the ZF 4656.056.117 be used in a WG 200 transmission?
A: Yes, this part is cross-compatible with WG 200 series transmissions that share the same valve body design. Always confirm by comparing the part number with your transmission’s OEM parts list.

Q: What tools are required to replace this component?
A: Replacement typically requires a torque wrench, hex keys, and a seal pick. Access to the valve body may also necessitate removing the HOUS.FRONT SECT for clearance.

Q: How can I tell if this part is the source of my oil leak?
A: Look for fresh fluid accumulation on the lower edge of the valve body near the HOUSING REAR PART interface. A pressure test can confirm if the 4656.056.117 is bypassing fluid.