Overview
The ZF 4651.152.021 is a precision-engineered OEM genuine component specifically designed for the WG 110 series transmission. This part functions as a critical hydraulic control element, regulating oil flow and pressure within the valve body assembly. It ensures smooth gear engagement and consistent clutch pack application under varying load conditions. The SKU 4651.152.021 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. This component sits within the lower valve body section, interfacing directly with the 4651101013: TRANSMISSION HOUSING to maintain hydraulic integrity.
Symptoms of Failure
- Delayed or harsh shifting: A worn 4651.152.021 can cause erratic clutch engagement, leading to noticeable “clunking” or hesitation when the transmission shifts between gears.
- Internal hydraulic pressure loss: When this part degrades, you may experience slipping under acceleration or on inclines, as the valve body cannot maintain proper line pressure.
- Oil contamination in the valve body: Debris from a failing unit can migrate into the 4651301032: HOUSING, causing erratic shift patterns and potential overheating.
- Fluid leaks at the housing interface: A compromised seal around this part often results in visible oil seepage near the transmission pan, often accompanied by burnt-smelling ATF.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4651.152.021 |
| Material | High-strength aluminum alloy with hardened steel insert |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions | 120 mm x 45 mm x 35 mm |
| OEM Reference | ZF 4651.152.021 (Genuine) |
| Sealing Surface | Precision-ground to 0.02 mm tolerance |
| Operating Temperature | -40°C to +120°C |
Compatibility
This genuine ZF part is primarily engineered for the WG 110 series transmission. It is also compatible with the following ZF models when used in conjunction with the correct housing assembly: WG 180, WG 200, and WG 210 series. Always verify the specific valve body configuration in your transmission. The part interfaces with the 4651301033: HOUSING and requires a new 0634303928: O-RING during installation to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301032 | HOUSING | Valve body support housing |
| 0634303928 | O-RING | Seals hydraulic passages |
| 4651301033 | HOUSING | Secondary valve body housing |
| 4651203002 | SCREEN SHEET | Filtration mesh for oil circuit |
| 4651303005 | SCREEN SHEET | Secondary oil strainer |
| 0636101032 | CAP SCREW | Fastener for housing assembly |
| 0630361028 | SEALING CAP | Closes hydraulic test ports |
| 4475280060 | SCREW PLUG | Seals oil drain passages |
| 0634303312 | O-RING | Secondary sealing ring |
Frequently Asked Questions
Q: Can I install the 4651.152.021 without replacing the O-ring?
A: No. ZF recommends always replacing the 0634303928: O-RING simultaneously. The old seal will have taken a compression set, risking immediate hydraulic leaks.
Q: How do I know if my WG110 needs this specific part?
A: If you have verified internal hydraulic pressure loss and the valve body shows scoring near the shift bore, the 4651.152.021 is likely the culprit. Cross-reference your transmission serial number with ZF’s documentation.
Q: Is this part interchangeable with aftermarket versions?
A: Only OEM genuine ZF parts like this one guarantee the exact metallurgy and surface finish required for reliable operation. Aftermarket copies often fail prematurely due to improper heat treatment.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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