Overview
The ZF 6009.047.821 CONTROL UNIT is a critical electronic-hydraulic interface within the WG150 transmission series. This OEM genuine part governs shift timing, pressure modulation, and clutch engagement sequences by processing input signals from the vehicle’s ECU and directing hydraulic flow to the valve body. Positioned directly on the transmission housing, the control unit ensures precise gear transitions under varying load conditions. The SKU 6009.047.821 is engineered to ZF’s original tolerances, making it a direct replacement for failed units in heavy-duty applications.
Symptoms of Failure
- Erratic shifting or delayed engagement: When the control unit degrades, the transmission may hesitate before shifting or slam into gear, often accompanied by harsh jolts during acceleration.
- Intermittent loss of gear selection: A failing 6009.047.821 can cause the transmission to unexpectedly drop out of gear or refuse to shift into reverse, particularly under heavy load.
- Transmission fluid contamination from internal shorts: Electrical failures within the control unit can burn internal seals, allowing debris to mix with the oil, leading to clogged screens and reduced hydraulic pressure.
- Persistent diagnostic trouble codes (DTCs): Faults related to solenoid circuits or pressure sensors often trace back to a compromised control unit, triggering warning lights on the dashboard.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6009.047.821 |
| OEM Reference | ZF 6009.047.821 |
| Material | Die-cast aluminum housing with sealed electronic module |
| Weight | 1.8 kg (3.97 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 65 mm |
| Operating Voltage | 12V / 24V DC (vehicle-dependent) |
| Seal Type | Integrated O-ring gasket (replaceable) |
Compatibility
This control unit is specifically designed for the ZF WG150 transmission series. It is also compatible with select variants of the WG180 and WG200 models that share the same electronic architecture and mounting flange pattern. Always verify the transmission serial number against ZF’s application guide to ensure proper fitment. The unit interfaces directly with the TRANSMISSION HOUSING (4642101109) and the TRANSMISSION HOUSING (4642301205), both of which provide the structural mounting points and fluid passages required for operation. During installation, the TYPE PLATE (0730365125) should be transferred to the new unit for identification, and the GROOVED STUD (0631311009) must be torqued to specification to prevent fluid leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear train and valve body |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing section for clutch pack assembly |
| 0730365125 | TYPE PLATE | Identification plate with transmission serial number |
| 0631311009 | GROOVED STUD | Fastener for securing control unit to housing |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic fluid intake |
| 4642301169 | SCREEN SHEET | Secondary filter screen for valve body return line |
| 0636100621 | HEXAGON SCREW | Mounting bolt for control unit bracket |
| 4642301186 | SCREEN SHEET | High-flow screen for cooler circuit |
| 4644106324 | SHIFT SYSTEM | Mechanical linkage for manual override |
| 4644306598 | PLATE | Cover plate for control unit access port |
ZF 6009.047.821 CONTROL UNIT – Control Unit RFQ Support
PartsZF supports RFQ review for ZF 6009.047.821 CONTROL UNIT in transmission control-system sourcing. The key step is confirming the part number against the machine or removed-unit evidence.
Part-Number Summary
Use ZF number 6009.047.821 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: LOOSE PARTS
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 | 6009.047.821 |
|---|---|
| Normalized SKU | 6009047821 |
| Part name | CONTROL UNIT |
| Product category | control unit |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. 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.
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