Overview
The ZF 6009.065.221 is a precision-engineered OEM genuine part specifically designed for the WG 110 series transmission. This component plays a critical role in managing hydraulic fluid flow and pressure within the gearbox, ensuring smooth clutch engagement and reliable power transfer. As a direct replacement for the original factory unit, the SKU 6009.065.221 is manufactured to ZF’s exacting tolerances, guaranteeing a perfect fit and long service life. It sits within the valve body or hydraulic control assembly, where it regulates the distribution of transmission fluid to various clutches and brakes. For optimal sealing and structural integrity, this part is often installed alongside the 4651101013: TRANSMISSION HOUSING and the 4651301032: HOUSING to maintain proper alignment and fluid containment.
Symptoms of Failure
When the ZF 6009.065.221 begins to wear out, operators will notice distinct performance degradation. Common failure symptoms include:
- Delayed or harsh shifting – Worn internal bores or spools cause erratic hydraulic pressure, leading to gear engagement hesitation or jarring shifts.
- Transmission fluid leaks – Degraded seals around this part allow ATF to escape, often pooling near the bell housing or valve body area.
- Slipping under load – Insufficient pressure regulation results in clutch pack slippage, especially when climbing grades or carrying heavy loads.
- Erratic neutral-to-drive engagement – A failing unit may cause the transmission to take several seconds to engage when shifting from neutral to drive.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 6009.065.221 |
| Material | Hardened steel / Aluminum alloy |
| Weight | 0.45 kg (1.0 lb) |
| Dimensions (L x W x H) | 85 mm x 45 mm x 30 mm |
| OEM Reference | ZF WG 110 Series |
| Sealing Surface Finish | Ra 0.8 µm |
Compatibility
This genuine ZF part is primarily engineered for the WG 110 series transmission. It is also compatible with the following ZF models that share a similar hydraulic control architecture: WG 180, WG 200, and WG 150. Always verify the exact part number against your transmission’s serial plate before installation. For complete assembly integrity, ensure the 0634303928: O-RING is replaced simultaneously to prevent fluid bypass, and confirm the 4651301033: HOUSING is free of cracks or deformation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301032 | HOUSING | Secondary housing for valve body support |
| 0634303928 | O-RING | Seals fluid passages between components |
| 4651301033 | HOUSING | Lower housing for hydraulic control unit |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4651303005 | SCREEN SHEET | Secondary filtration mesh for oil sump |
| 0636101032 | CAP SCREW | Fastens housing sections together |
| 0630361028 | SEALING CAP | Closes off unused hydraulic ports |
| 4475280060 | SCREW PLUG | Threaded plug for pressure test points |
| 0634303312 | O-RING | Seals screw plug and cap interfaces |
Frequently Asked Questions
Q: Can the ZF 6009.065.221 be installed without replacing the O-rings?
A: It is strongly recommended to replace all sealing elements, especially the 0634303928: O-RING, during installation. Reusing old seals risks immediate fluid leaks and pressure loss.
Q: How do I know if my WG 110 transmission needs this specific part?
A: If you experience erratic shifting or visible fluid seepage near the valve body area, inspect the 6009.065.221 for scoring or wear. A pressure test will confirm if this component is failing.
Q: Is this part interchangeable with any aftermarket versions?
A: Only OEM genuine ZF parts like the 6009.065.221 guarantee exact material hardness and dimensional accuracy. Aftermarket copies may cause premature failure or poor shift quality.
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Phone: +86 158 2286 3467 |
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