Overview
The ZF 2093.268.019 PISTON SUPPORT is a precision-machined internal component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the structural foundation for the piston assembly within the hydraulic control unit, ensuring consistent clamping force during gear shifts. The SKU 2093.268.019 sits directly inside the valve body housing, where it aligns with the 2093109001: DIFFERENTIAL to maintain proper oil flow distribution. Without this support, the piston cannot maintain the necessary hydraulic pressure for smooth engagement.
Symptoms of Failure
- Delayed or harsh gear engagement – When the piston support wears, hydraulic pressure drops, causing a noticeable lag or jarring shift between forward and reverse gears.
- Internal transmission oil leaks – A cracked or deformed support allows ATF to bypass the piston seal, leading to low fluid levels and puddles under the vehicle.
- Intermittent gear slipping under load – Worn support surfaces cause the piston to tilt, resulting in clutch pack slippage during acceleration or uphill driving.
- Erratic shift timing – The transmission may shift too early or too late as the support fails to stabilize the piston stroke, often accompanied by a whining noise from the valve body.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.268.019 |
| Material | Hardened alloy steel (DIN 1.7131) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Height | 24.8 mm |
| Weight | 0.34 kg |
| OEM Reference | ZF 2093.268.019 |
| Surface Finish | Ground, Ra ≤ 0.4 µm |
Compatibility
This piston support is specifically designed for ZF WG-series transmissions. It is a direct fit for the WG100, WG130, and WG131 models used in medium-duty trucks and construction equipment. The part also interfaces with the 0750117075: TAPER ROLLER BEARING and the 2093209095: DIFFERENTIAL assembly. For WG180 or WG200 applications, verify housing dimensions, as the support bore may require the 2093309071: DIFF.HOUSING adapter.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109001 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309071 | DIFF.HOUSING | Encloses differential gear set |
| 0631100223 | SPRING PIN | Secures piston support alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction in rotating assemblies |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Prevents gear end-play in differential |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear for torque splitting |
Frequently Asked Questions
Q: Can I reuse the old piston support if it looks clean?
A: No. Even minor surface wear on the 2093.268.019 support will cause hydraulic pressure loss. Always replace it with a new OEM unit during a valve body rebuild.
Q: Does this part fit the ZF WG180 transmission?
A: The 2093.268.019 is designed for WG100/WG130/WG131. For WG180, you may need to also replace the 2093309071: DIFF.HOUSING to match the support bore diameter.
Q: What tools are needed to install this piston support?
A: You will need a piston ring compressor, a torque wrench (25 N·m), and a soft-faced mallet. Always lubricate the support with ATF before insertion.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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