Overview
The ZF 4657.301.068 TUBE is a precision-engineered fluid conduit designed for the WG191 and WG211 series transmissions. This OEM genuine part channels hydraulic oil between the valve body and the clutch pack assembly, ensuring consistent pressure delivery for smooth gear engagement. As a critical component of the transmission’s hydraulic circuit, the tube maintains the integrity of the lubrication and cooling system. The SKU 4657.301.068 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Hydraulic oil leaks around the transmission housing: A worn or cracked 4657.301.068 TUBE often causes visible oil seepage near the valve body area, leading to low fluid levels and potential overheating.
- Delayed or harsh gear engagement: When the tube loses its structural integrity, hydraulic pressure drops, resulting in sluggish shifting or abrupt clutch application during acceleration.
- Transmission slipping under load: A compromised tube disrupts the oil flow to the clutches, causing the transmission to slip when moving heavy loads or climbing grades.
- Unusual whining or grinding noises: Insufficient lubrication due to a restricted or leaking tube can produce metallic sounds from the gear train, indicating accelerated wear.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.301.068 |
| Material | High-grade steel with anti-corrosion coating |
| Length | 185 mm (estimated) |
| Outer Diameter | 12 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4657.301.068 |
| Compatible Fluid Type | ZF TE-ML 03 or 05 approved ATF |
Compatibility
This tube is engineered for the ZF WG191 and WG211 series transmissions, which are commonly used in off-highway vehicles, construction equipment, and agricultural machinery. It also fits select models in the WG180 and WG200 families, as the hydraulic circuit design shares common dimensions. Always verify the part number against your transmission’s serial number to ensure a perfect fit. For precise installation, pair this tube with the 4657120005: PRESSURE REGULATOR to maintain optimal hydraulic pressure, and the 0501211384: VALVE to control fluid direction. The 0630532183: INDENTED RING secures the tube in place, while the 4656306145: PISTON works in tandem to actuate the clutch pack.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure to the clutches |
| 0501211384 | VALVE | Directs oil flow within the valve body |
| 0630532183 | INDENTED RING | Secures tube and prevents axial movement |
| 4656306145 | PISTON | Actuates clutch pack engagement |
| 0732042767 | COMPRESSION SPRING | Provides return force for valve spools |
| 0631612064 | SET SCREW | Locks adjustment points in the valve body |
| 0631610026 | SET SCREW | Secures housing alignment pins |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4657301130 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of the transmission housing |
Frequently Asked Questions
Q: Can the 4657.301.068 TUBE be reused after removal?
A: No. This tube is a single-use component due to its crush-seal design. Reusing it risks hydraulic leaks and pressure loss. Always install a new OEM tube during transmission rebuilds.
Q: How do I know if this tube fits my WG191 transmission?
A: Check the stamped part number on the original tube. If it matches 4657.301.068, it is a direct replacement. For WG211 models, verify the tube routing matches the valve body layout.
Q: What tools are needed to replace this tube?
A: You will need a torque wrench, a 10mm socket, and a pick tool to remove the old indented ring. Refer to the ZF service manual for the exact tightening sequence.
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Phone: +86 158 2286 3467 |
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