Overview
The ZF 4656.223.003 TUBE for WG190/WG210 is a precision-engineered hydraulic fluid conduit that directs pressurized oil within the transmission’s valve body and clutch pack circuits. As an OEM genuine part, this tube ensures correct flow rates and pressure integrity during gear shifts. The SKU 4656.223.003 is specifically designed to interface with the main casing and the TRANSMISSION HOUSING, forming a sealed pathway that prevents cross-contamination between lubrication and actuation circuits. This component is critical for maintaining the precise hydraulic timing required in WG-series transmissions.
Symptoms of Failure
- Hydraulic fluid seepage at tube junctions: Worn sealing surfaces on the 4656.223.003 tube cause visible oil drips around the HOUS.FRONT SECT interface, leading to low fluid levels and eventual gear slipping under load.
- Delayed or harsh shifting: A cracked or deformed tube disrupts oil pressure to the clutch packs, resulting in noticeable hesitation when shifting from 2nd to 3rd gear.
- Overheating transmission fluid: Restricted flow through a damaged tube reduces cooling circulation, causing the transmission to run hotter than normal and triggering warning lights.
- Erratic torque converter lockup: Pressure loss from a failing tube prevents proper converter clutch engagement, producing a shuddering sensation at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.223.003 |
| Material | Seamless drawn steel with zinc-nickel plating |
| Overall Length | 185 mm |
| Outer Diameter | 12.7 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4656.223.003 |
| Seal Type | O-ring groove at both ends |
Compatibility
This tube is a direct replacement for ZF WG190 and WG210 series transmissions. It also fits select WG230 variants that share the same hydraulic routing architecture. The 4656.223.003 is installed between the HOUSING REAR PART and the HOUSING REAR PART (alternate casting) to complete the main pressure gallery. Always verify your transmission’s serial number against ZF’s compatibility chart before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101052 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets |
| 4657201151 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4657201105 | HOUSING REAR PART | Rear casing supporting output shaft bearings |
| 4472239185 | HOUSING REAR PART | Alternate rear housing casting for WG210 |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M10 bolt for securing tube brackets |
| 4656301148 | FIXING PLATE | Retainer plate for tube routing |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil pump intake |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for valve body |
| 0636100803 | CAP SCREW | M12 bolt for housing flange connection |
Frequently Asked Questions
Q: Can the 4656.223.003 tube be repaired if it has a small dent?
A: No. Any deformation in this precision tube alters the internal cross-section and disrupts hydraulic flow. ZF recommends only replacement with an OEM genuine part to maintain proper pressure curves.
Q: Does this tube require special tools for installation?
A: Yes. You will need a torque wrench capable of 25 Nm and a 10mm hex socket for the retaining bracket bolts. Always replace the O-rings at both ends during installation to prevent leaks.
Q: How can I confirm this tube fits my WG210 transmission?
A: Locate the transmission serial number stamped on the TRANSMISSION HOUSING. If the serial number falls within the WG210 range (typically 210-xxxxx), this part is compatible. For WG230 units, verify the oil cooler line routing matches the tube’s bend angle.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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