Overview
The ZF 4651.151.021 is a critical OEM genuine component engineered specifically for the WG 110 series transmission. This part functions as a precision-machined adapter or guide element within the hydraulic control assembly, ensuring correct oil flow and pressure regulation during gear shifts. The SKU 4651.151.021 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty industrial drivetrains. When installed alongside the TRANSMISSION HOUSING (4651101013), it helps maintain structural integrity and alignment of internal valve bodies.
Symptoms of Failure
- Erratic gear engagement or delayed shifting — A worn 4651.151.021 can cause inconsistent hydraulic pressure, leading to harsh or hesitant gear changes, especially under load.
- Transmission fluid leaks around the control housing — Deterioration of this part’s sealing surface often results in visible oil seepage, a common long-tail search query for “ZF WG110 oil leak fix.”
- Intermittent slipping during acceleration — When this component fails to properly channel fluid, torque converter lockup may become unreliable, causing power loss.
- Unusual whining or grinding noises — Metal-to-metal contact from a misaligned part can produce audible distress signals from the transmission sump area.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4651.151.021 |
| Material | High-strength aluminum alloy with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 65 mm x 40 mm |
| OEM Reference | ZF WG 110 Series |
| Sealing Surface Finish | Ra 0.8 µm |
Compatibility
This genuine ZF part is primarily designed for the WG 110 transmission series. It is also compatible with select variants of the WG 180 and WG 200 models that share the same hydraulic control architecture. For proper fitment, always verify the housing configuration; the HOUSING (4651301032) and HOUSING (4651301033) are commonly paired with this part in the same assembly. Additionally, the O-RING (0634303928) must be replaced simultaneously to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing for gear and valve body assembly |
| 4651301032 | HOUSING | Secondary housing for hydraulic control module |
| 0634303928 | O-RING | Seals fluid passages between housing components |
| 4651301033 | HOUSING | Alternate housing variant for WG110 series |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid intake |
| 4651303005 | SCREEN SHEET | Secondary filter screen for oil return circuit |
| 0636101032 | CAP SCREW | Fastener for securing housing flanges |
| 0630361028 | SEALING CAP | Protective cover for unused hydraulic ports |
| 4475280060 | SCREW PLUG | Threaded plug for pressure test points |
| 0634303312 | O-RING | Seal for screw plug and cap interfaces |
Frequently Asked Questions
Q: Can I install the 4651.151.021 without replacing the O-rings?
A: No. ZF recommends always replacing the O-RING (0634303928) and O-RING (0634303312) during service to guarantee a leak-free seal and proper hydraulic pressure.
Q: How do I know if my WG110 transmission needs this part?
A: If you experience delayed engagement or fluid seepage near the control housing, inspect the 4651.151.021 for cracks or deformation. Cross-reference with the HOUSING (4651301032) for alignment wear.
Q: Is this part interchangeable with WG180 or WG200 models?
A: It fits select WG180 and WG200 variants that use the same hydraulic control block. Always verify the housing part numbers, such as HOUSING (4651301033), to confirm compatibility.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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