Overview
This OEM genuine ZF 4656.006.023 is a critical internal component designed specifically for the WG 115 Series transmission. It functions as a precision-engineered sealing and alignment element within the hydraulic control system, ensuring proper oil flow and pressure regulation during gear shifts. The part number 4656.006.023 is manufactured to ZF’s original factory tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. It sits in the valve body assembly, where it interfaces with the 4656101037: TRANSMISSION HOUSING to maintain system integrity.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4656.006.023 wears, hydraulic pressure drops, causing noticeable lag when shifting from neutral to drive or reverse.
- Intermittent slipping under load: Worn sealing surfaces allow fluid bypass, leading to clutch pack slip during acceleration or hill climbing.
- Low transmission fluid pressure warnings: Dashboard alerts or diagnostic trouble codes (DTCs) related to insufficient line pressure often trace back to this component.
- Visible oil seepage around valve body area: Cracks or deformation in the part can cause external leaks, leaving puddles under the transmission.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.006.023 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.45 kg (1.0 lb) |
| Outer Diameter | 42 mm |
| Inner Diameter | 18 mm |
| Height | 28 mm |
| OEM Reference | ZF 4656.006.023 |
| Compatible Housing | 4656201075: HOUS.FRONT SECT |
| Rear Housing Option | 4656201035: HOUSING REAR PART or 4472239178: HOUSING REAR PART |
Compatibility
This genuine ZF 4656.006.023 is engineered for the WG 115 Series transmission family. It is also compatible with the WG180, WG200, and WG250 models when used in conjunction with the correct 4656101037: TRANSMISSION HOUSING. Always verify your transmission serial number before ordering. The part fits both on-highway truck applications and off-highway industrial equipment using ZF’s modular WG architecture.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201035 | HOUSING REAR PART | Rear housing for output shaft support |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 4656301148 | FIXING PLATE | Secures valve body components |
| 0636100817 | CAP SCREW | Fastener for housing attachment |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Alternate mesh filter variant |
| 0636100803 | CAP SCREW | Secondary fastener for rear housing |
Frequently Asked Questions
Q: Can I install this 4656.006.023 without removing the transmission from the vehicle?
A: In most cases, yes. This part is accessible after removing the transmission oil pan and valve body cover. However, on some WG115 installations with limited chassis clearance, partial transmission removal may be necessary.
Q: How does this part interact with the 4656101037 transmission housing?
A: The 4656.006.023 seats directly into a machined bore within the 4656101037: TRANSMISSION HOUSING, creating a sealed passage for pressurized oil. A worn part will cause cross-leakage between circuits.
Q: What torque specification should I use for the cap screws when reassembling?
A: For the 0636100817: CAP SCREW and 0636100803: CAP SCREW, ZF specifies 25 Nm (18.4 ft-lb) with thread locker applied. Always use a calibrated torque wrench.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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