Overview
The ZF 2093.103.030 COUNTERSHAFT is a critical internal component engineered for the WG100, WG130, and WG131 transmission series. As the primary torque-transferring shaft, it meshes directly with multiple gear sets to facilitate smooth ratio changes under heavy load. This OEM genuine part (SKU: 2093.103.030) is precision-ground to maintain exacting gear alignment, ensuring minimal power loss and extended service life in commercial vehicles and industrial machinery. It sits centrally within the main gear cluster, supported by bearings and sealed within the 2093101052: HOUSING assembly.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn countershaft teeth create a high-pitched whine, especially noticeable when accelerating or decelerating under load.
- Intermittent gear slippage under torque: As the countershaft loses its hardened surface, gears fail to maintain positive engagement, causing sudden loss of drive power.
- Metallic debris in transmission fluid: Flaking or pitting on the countershaft releases fine steel particles into the oil, often visible during routine drain intervals.
- Vibration through the gearshift lever: A damaged countershaft induces rhythmic vibrations that transmit directly to the driver’s controls, worsening at higher RPMs.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2093.103.030 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Overall Length | 485 mm |
| Diameter (bearing journals) | 45 mm / 55 mm |
| Weight | 8.2 kg |
| OEM Reference | ZF 2093.103.030 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
| Surface Finish | Ground, Ra ≤ 0.4 µm |
Compatibility
This countershaft is specifically designed for the ZF WG100, WG130, and WG131 mechanical transmissions. It also fits select variants of the WG180 and WG200 series when used with the correct 2093298063: TRANSMISSION HOUSING or the 2093301069: TRANSMISSION HOUSING. Always verify spline count and bearing bore dimensions before installation. The assembly requires a 4475280015: SCREW PLUG to seal the oil gallery after installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093101052 | HOUSING | Encloses the countershaft and gear cluster |
| 2093298063 | TRANSMISSION HOUSING | Main structural case for WG series |
| 2093301069 | TRANSMISSION HOUSING | Alternate housing for WG131 variants |
| 4475280015 | SCREW PLUG | Seals oil passages in housing |
| 0730365092 | TYPE PLATE | Identification label for transmission |
| 4475280150 | SCREW PLUG | Drain/fill plug for housing |
| 0634304731 | O-RING | Seals plug-to-housing interface |
| 2093301033 | COVER | Access cover for countershaft inspection |
| 0636015073 | HEXAGON SCREW | Fastener for cover and housing |
| 0634314235 | O-RING | Seals cover-to-housing joint |
Frequently Asked Questions
Q: Can I use this countershaft in a ZF WG180 transmission?
A: Yes, but only if you also replace the 2093298063: TRANSMISSION HOUSING to match the bearing bore dimensions. Always cross-reference your transmission serial number.
Q: What torque should I apply to the screw plugs during installation?
A: For the 4475280015: SCREW PLUG, use 35 Nm with a new 0634304731: O-RING installed. Over-tightening can distort the housing.
Q: How do I identify a genuine ZF 2093.103.030 countershaft?
A: Genuine parts have a laser-etched part number on the shaft body and a uniform matte finish. Counterfeits often show grinding marks or incorrect heat-treat coloration.
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Phone: +86 158 2286 3467 |
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