Overview
The ZF 4657.354.056 TUBE is a precision-engineered fluid conduit designed for the WG171, WG191, and WG211 transmission series. This OEM genuine part routes pressurized hydraulic oil between the valve body and the clutch packs, ensuring consistent lubrication and shift pressure. As a critical component within the transmission’s hydraulic circuit, the 4657.354.056 tube works in concert with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain proper fluid dynamics. When this tube degrades, the entire hydraulic balance is compromised, leading to performance issues that demand immediate attention.
Symptoms of Failure
- External oil leaks near the transmission bell housing: A cracked or corroded 4657.354.056 tube often causes fluid seepage, visible as drips or wet spots on the casing.
- Delayed or harsh gear engagement: When this tube fails to deliver adequate pressure, shifts become sluggish or abrupt, particularly under load.
- Low transmission fluid level without visible external damage: Internal cracks can allow fluid to bypass into the sump, mimicking a leak elsewhere in the system.
- Whining or humming noise during acceleration: Restricted flow through a damaged tube creates cavitation, producing audible hydraulic noise.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.354.056 |
| Material | Steel with anti-corrosion coating |
| Length | ~210 mm |
| Outer Diameter | 12 mm |
| Wall Thickness | 1.5 mm |
| Weight | ~0.15 kg |
| OEM Reference | ZF 4657.354.056 |
| Sealing Method | O-Ring (use 0634313514: O-RING) |
| Fastening | 0636100803: CAP SCREW |
Compatibility
This tube is engineered for ZF WG-series transmissions, specifically the WG171, WG191, and WG211 models. It also fits closely related variants such as the WG180 and WG200 series, where hydraulic routing is identical. The part interfaces directly with the SCREEN SHEET and the TUBE assembly to ensure uninterrupted fluid flow. Always verify your transmission’s serial number against ZF’s compatibility charts before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports all internal components |
| 4656301066 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201015 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4656301037 | TUBE | Secondary fluid routing channel |
| 0634313514 | O-RING | Seals tube connections to prevent leaks |
| 0636100803 | CAP SCREW | Secures tube to housing |
| 4656301064 | HOUSING REAR PART | Rear section housing for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise assembly |
| 0636100801 | CAP SCREW | Fastener for rear housing attachment |
| 0636100160 | CAP SCREW | Fastener for front housing attachment |
Frequently Asked Questions
Q: Can I replace the 4657.354.056 tube without removing the transmission?
A: In most WG171/WG191/WG211 applications, this tube is accessible after draining the fluid and removing the transmission pan. However, if the tube is located near the rear housing, you may need to detach the HOUSING REAR PART for full access.
Q: What torque should I use for the cap screws securing this tube?
A: Use 25 Nm for the 0636100803: CAP SCREW and 30 Nm for the 0636100160: CAP SCREW. Always replace the O-ring (part 0634313514) during installation to prevent leaks.
Q: How do I know if this tube is compatible with my WG200 transmission?
A: The 4657.354.056 tube is physically identical to the tube used in WG200 models, but confirm by checking the hydraulic circuit diagram. If your transmission uses a SCREEN SHEET with the same mounting pattern, this part will fit.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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