ZF 4681.201.006 TUBE for WG190/WG210 | OEM Genuine Part

Overview

The ZF 4681.201.006 TUBE is a precision-engineered fluid conduit designed specifically for the WG190, WG210, and WG230 series transmissions. This OEM genuine part plays a critical role in directing hydraulic oil flow within the transmission’s lubrication and cooling circuits, ensuring consistent pressure delivery to clutch packs and bearings. The SKU 4681.201.006 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal and optimal fluid dynamics. This tube integrates directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a sealed oil gallery, making it indispensable for maintaining proper transmission function.

Symptoms of Failure

When the ZF 4681.201.006 tube degrades or becomes damaged, several distinct operational issues arise. Hydraulic oil seepage around the tube-to-housing interface is the most common early indicator, often visible as wet spots on the transmission casing. Erratic gear engagement or delayed shifting occurs when internal cracks reduce line pressure, causing clutches to slip under load. Overheating of the transmission fluid can result from restricted flow through a deformed tube, leading to accelerated wear of internal components. Audible whining or cavitation noises from the pump area frequently accompany a compromised tube, as air enters the hydraulic circuit through a failed seal.

Technical Specifications

Compatibility

This tube is engineered for the ZF WG series of powershift transmissions. It is a direct fit for the WG190 and WG210 models, and also serves the WG230 series with identical mounting geometry. The part interfaces with the HOUSING REAR PART and the HOUSING REAR SECTION to complete the hydraulic circuit. While primarily designed for WG180, WG190, WG200, WG210, and WG230 variants, always verify your transmission’s serial number against ZF’s official compatibility charts before installation.

Related Components

Frequently Asked Questions

Q: Can the 4681.201.006 tube be repaired if it develops a small crack?
A: No. ZF does not recommend repairing this tube. Any crack or deformation compromises the hydraulic seal and pressure integrity. Replacement with the OEM genuine part is the only safe solution to prevent transmission damage.

Q: How do I confirm this tube fits my WG210 transmission?
A: Check the transmission model plate located on the main housing. The WG210 will have a serial number beginning with “WG210”. Additionally, measure the existing tube’s length (185mm) and outer diameter (12mm) to cross-reference with the 4681.201.006 specifications.

Q: What torque should be applied to the cap screws securing this tube?
A: For the associated CAP SCREW (0636100801) and CAP SCREW (0636100803), ZF specifies a torque of 25 Nm ± 2 Nm. Always use a calibrated torque wrench and apply thread locker to prevent loosening from vibration.