Overview
The ZF 6073.017.256 TCU ERGOPOWER M/L EC4A is a critical electronic control unit specifically designed for the WG210 series powershift transmission. This OEM genuine part manages shift timing, clutch modulation, and diagnostic communication within the transmission’s hydraulic network. Mounted directly on the valve body assembly, the TCU interprets input from speed sensors and the operator’s joystick to deliver precise gear engagement. The SKU 6073.017.256 is the direct replacement for the original factory-installed unit, ensuring plug-and-play compatibility without requiring software reflashing in most applications. For complete assembly integrity, this TCU is often paired with the 4657101085: TRANSMISSION HOUSING and the 4657201161: HOUS.FRONT SECT to maintain proper sealing and alignment.
Symptoms of Failure
- Erratic or delayed shifting: A failing TCU often causes the WG210 to hesitate between gears or slam into gear unexpectedly, especially under load. This is a common search query for “ZF WG210 shifting problems.”
- Loss of forward or reverse: The transmission may fail to engage a specific direction, or it may intermittently drop out of gear during operation, indicating a corrupted control signal from the 6073.017.256 unit.
- Dashboard warning lights and limp mode: When the TCU detects internal faults, it triggers a diagnostic trouble code (DTC) and forces the transmission into a reduced-power limp mode. Operators often search for “ZF TCU error code fix” when this occurs.
- Intermittent communication failure: The TCU may stop communicating with the vehicle’s CAN bus, causing the gear display to go blank or show dashes. This is frequently linked to internal circuit board degradation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 6073.017.256 |
| OEM Reference | ZF ERGOPOWER M/L EC4A |
| Material | Die-cast aluminum housing with conformal-coated PCB |
| Dimensions (L x W x H) | 210 mm x 140 mm x 45 mm |
| Weight | 1.2 kg (2.65 lbs) |
| Operating Voltage | 12V / 24V DC (auto-sensing) |
| Connector Type | Deutsch DT04-6P (6-pin sealed) |
| Protection Rating | IP67 (dust and water ingress) |
| Compatible Transmission Series | WG210, WG180, WG200 |
Compatibility
This TCU is engineered primarily for the ZF WG210 series, but it also functions as a direct replacement in the WG180 and WG200 transmissions that utilize the ERGOPOWER M/L EC4A control architecture. It is not compatible with older WG120 or WG150 models that use a different pinout configuration. When replacing the TCU, always inspect the 4657201162: HOUSING REAR PART and the 4657298107: HOUSING REAR SECTION for cracks or corrosion, as these housings directly support the TCU mounting bracket and wiring harness routing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing for gear train and valve body |
| 4657201161 | HOUS.FRONT SECT | Front section housing for input shaft and pump |
| 4657201162 | HOUSING REAR PART | Rear section supporting output flange and PTO |
| 4657298107 | HOUSING REAR SECTION | Extended rear housing for planetary gear set |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing-to-housing mating |
| 0636100801 | CAP SCREW | M10 bolt for securing valve body to housing |
| 4656301148 | FIXING PLATE | Retainer plate for TCU mounting bracket |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic oil return line |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for suction side of pump |
| 0636100803 | CAP SCREW | M8 bolt for housing rear section attachment |
