Overview
The ZF 2093.268.034 PISTON SUPPORT is a precision-machined component designed to provide a stable mounting surface for the clutch piston assembly within ZF WG-series transmissions. This genuine OEM part, identified by SKU 2093.268.034, sits directly inside the transmission housing, acting as a critical interface between the hydraulic piston and the clutch pack. By ensuring correct piston alignment and sealing, this support prevents hydraulic fluid bypass and maintains consistent clutch engagement pressure. For optimal drivetrain integrity, this piston support works in concert with the 2093109003: DIFFERENTIAL and the 0750117075: TAPER ROLLER BEARING to manage axial loads and rotational forces.
Symptoms of Failure
When the ZF 2093.268.034 piston support wears or cracks, operators will notice distinct performance degradation. Look for these specific failure indicators:
- Hydraulic oil leaks around the transmission bell housing – A worn support surface allows pressurized ATF to bypass the piston seal, creating visible drips or wet spots on the exterior.
- Delayed or harsh gear engagement – Insufficient piston support causes uneven clutch pack compression, resulting in a noticeable lag or a jarring shift when moving from Neutral to Drive or Reverse.
- Intermittent gear slipping under load – As the support degrades, the clutch piston cannot maintain full clamping force, leading to momentary power loss during acceleration or hill climbing.
- Metallic debris in the transmission fluid – Fractured support surfaces shed aluminum particles into the oil, often visible during routine fluid changes or filter inspections.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.268.034 |
| Material | High-strength aluminum alloy (EN AC-42100) |
| Outer Diameter | 148.5 mm |
| Inner Diameter | 92.0 mm |
| Height | 38.2 mm |
| Weight | 0.87 kg |
| OEM Reference | ZF 2093.268.034 |
| Surface Finish | Anodized, Ra ≤ 0.8 µm |
Compatibility
This genuine ZF piston support is engineered for the WG100, WG130, and WG131 transmission series. These models are commonly found in medium-duty commercial vehicles, municipal trucks, and off-highway equipment. The part is also compatible with the 2093209096: DIFFERENTIAL assembly and the 2093309073: DIFF.HOUSING used in these transmissions. Always verify your transmission model code before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109003 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial shaft loads |
| 2093209096 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309073 | DIFF.HOUSING | Encloses differential gear set |
| 0631100223 | SPRING PIN | Secures components against rotation |
| 0730300820 | THRUST WASHER | Reduces axial friction between moving parts |
| 4482360002 | AXLE BEVEL GEAR | Transfers power at 90-degree angles |
| 2097309085 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Controls end-play in gear sets |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear for torque splitting |
Frequently Asked Questions
Q: Can the 2093.268.034 piston support be reused after a transmission rebuild?
A: ZF recommends replacing this piston support with a new genuine part during any major overhaul. The anodized surface wears over time, and reusing it may lead to premature seal failure or hydraulic leakage.
Q: What tools are required to install this piston support?
A: Installation typically requires a bearing press, snap-ring pliers, and a torque wrench. The support must be seated squarely to avoid distorting the piston bore. Always consult the ZF service manual for your specific WG transmission model.
Q: Does this part fit the ZF WG180 or WG200 transmissions?
A: No. The 2093.268.034 is specifically designed for the WG100, WG130, and WG131 series. The WG180 and WG200 use a larger diameter piston support with a different part number. Always cross-reference your transmission serial number before purchasing.
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Phone: +86 158 2286 3467 |
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