Overview
This OEM genuine ZF 4651.152.028 component is a critical internal actuator or control piston assembly designed specifically for the WG 110 Series transmission. It functions as a hydraulic sealing and pressure-directing element within the valve body or clutch pack assembly, ensuring precise oil flow modulation during gear shifts. The SKU 4651.152.028 is engineered to OEM tolerances, providing a direct replacement that restores factory shift quality and prevents internal cross-leakage. When installed alongside a TRANSMISSION HOUSING, this part maintains the structural integrity of the hydraulic circuit.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn sealing surfaces on the 4651.152.028 cause hydraulic pressure loss, leading to “ZF transmission shifting hard” or “delayed forward engagement” complaints.
- Internal transmission oil leaks: Degraded O-rings or bore wear around this part result in “ZF WG110 oil leak from bell housing” or “transmission fluid pooling in valve body area.”
- Erratic clutch pack application: A failing actuator causes “ZF transmission gear slipping under load” or “intermittent loss of drive in reverse.”
- High-pitched whining noise: Cavitation from improper sealing produces a “transmission whine during acceleration” sound, often misdiagnosed as pump failure.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4651.152.028 |
| Material | Hardened alloy steel with nitrile sealing surfaces |
| Weight | 0.45 kg (1.0 lb) |
| Outer Diameter | 42.5 mm |
| Length | 68.3 mm |
| Seal Type | Integrated PTFE lip seal |
| Operating Pressure | 12-18 bar (174-261 psi) |
Compatibility
This genuine ZF 4651.152.028 is primarily designed for the WG 110 Series transmissions. It is also compatible with select ZF WG180 and WG200 models that share the same hydraulic control architecture. Always verify the part number against your transmission’s serial plate. For proper assembly, ensure the mating HOUSING is free of scoring, and replace the O-RING during installation to prevent future leaks. In some WG110 variants, this part interfaces with a secondary HOUSING that requires simultaneous inspection.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301032 | HOUSING | Intermediate hydraulic bore support |
| 0634303928 | O-RING | Static seal for hydraulic pressure retention |
| 4651301033 | HOUSING | Secondary bore housing for actuator |
| 4651203002 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4651303005 | SCREEN SHEET | Coarse debris screen for sump |
| 0636101032 | CAP SCREW | Fastener for housing retention |
| 0630361028 | SEALING CAP | Port closure for test points |
| 4475280060 | SCREW PLUG | Threaded plug for drain ports |
| 0634303312 | O-RING | Secondary seal for plug assembly |
Frequently Asked Questions
Q: Can I install the 4651.152.028 without replacing the O-rings?
A: It is strongly recommended to replace all sealing elements, including the O-RING, during installation. Old seals may have compression set, leading to immediate hydraulic leaks.
Q: How do I know if my WG110 uses this specific actuator?
A: Check the transmission serial plate for “WG110” and compare the bore diameter. This part fits housings with a 42.5mm bore. If your unit uses a different size, verify against the HOUSING part number.
Q: What causes premature wear on this part?
A: Contaminated transmission fluid with metal debris or clutch material abrasives accelerates seal wear. Always replace the SCREEN SHEET and flush the cooler when replacing this actuator.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
