Overview
The ZF 4646.123.009 CONTROL UNIT is a precision-engineered electronic module that governs hydraulic actuation within the WG310 transmission series. Positioned directly on the valve body assembly, this OEM genuine part interprets input signals to regulate clutch engagement and shift timing. The SKU 4646.123.009 ensures exact replacement for factory-installed units, maintaining the transmission’s original performance parameters. Without this control unit, the WG310 cannot execute proper gear changes, as it serves as the central interface between the transmission control module and the hydraulic system.
Symptoms of Failure
- Erratic shifting or delayed engagement – A failing 4646.123.009 often causes unpredictable gear changes, particularly when the transmission is cold. Operators may notice hesitation before the transmission engages drive or reverse.
- Intermittent loss of gear selection – The control unit may drop specific gears under load, forcing the transmission into a limp-home mode. This symptom typically worsens as internal electronic components degrade.
- Hydraulic pressure fluctuations – Worn solenoids within the control unit produce inconsistent pressure readings, leading to harsh shifts or clutch slip during acceleration. This often triggers diagnostic trouble codes related to pressure control.
- No communication with diagnostic tools – A completely failed control unit will prevent scan tools from establishing communication with the transmission, indicating an internal electrical fault in the 4646.123.009.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4646.123.009 |
| Material | Die-cast aluminum housing with glass-filled nylon connector |
| Weight | 1.85 kg (4.08 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 65 mm |
| Operating Voltage | 12V DC (nominal) |
| Operating Temperature Range | -40°C to +120°C |
| Sealing Type | Integrated O-ring groove (requires 0634316523: O-RING) |
| Mounting Hardware | Uses 0636101153: CAP SCREW (4x M8 bolts) |
Compatibility
This control unit is specifically designed for the ZF WG310 series, but its electronic architecture shares commonality with other WG-family transmissions. Compatible models include the WG180, WG200, WG250, and WG300 series when fitted with the same hydraulic valve block configuration. The 4646.123.009 interfaces directly with the 4646301317: HOUSING and mounts onto the 4646101189: TRANSMISSION HOUSING using 0636115293: 螺栓 for secure attachment. Always verify the valve block casting number before installation, as later WG310 revisions may require updated firmware.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101189 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets and hydraulic circuits |
| 4646301317 | HOUSING | Intermediate housing supporting the control unit and valve block |
| 0636115293 | 螺栓 | M10 mounting bolt for securing housing assemblies |
| 0636101153 | CAP SCREW | M8 cap screw for control unit attachment |
| 0736300232 | 螺栓 | M12 bolt for valve block retention |
| 4475280208 | SCREW PLUG | Hydraulic port sealing plug for pressure testing |
| 0634316523 | O-RING | Elastomeric seal preventing fluid bypass at control unit interface |
| 4656306171 | VALVE BLOCK | Hydraulic manifold directing oil flow to clutches |
| 4656306190 | CONNECTING HOUSING | Adapter housing linking transmission to torque converter |
| 0501213997 | PRESSURE REGULATOR | Maintains consistent hydraulic pressure for shift quality |
ZF 4646.123.009 CONTROL UNIT – Control Unit RFQ Support
PartsZF helps B2B buyers source ZF 4646.123.009 CONTROL UNIT with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This control unit page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4646.123.009 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4646086048
- Documentation reference: 4646053011
- Documentation reference: 4646053014
- Documentation reference: 4646055002
- Illustration section: CONTROL UNIT
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4646.123.009 |
|---|---|
| Normalized SKU | 4646123009 |
| Part name | CONTROL UNIT |
| Product category | control unit |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: diagram. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 6057.014.084 CONTROL UNIT
- ZF 4657.123.006 CONTROL UNIT
- ZF 4657.123.003 CONTROL UNIT
- ZF 4657.123.016 CONTROL UNIT
- ZF 4656.123.008 CONTROL UNIT
