Overview
The ZF 6073.324.078 DRIVE PROGRAM is a critical OEM genuine component engineered for the hydraulic control system within heavy-duty ZF transmissions. This part functions as a precision-machined valve spool or actuator element, directing pressurized oil flow to engage specific gear sets and modulate clutch pack application. Positioned within the transmission’s valve body assembly, the 6073.324.078 ensures accurate shift timing and consistent hydraulic pressure regulation under extreme load conditions. As a genuine ZF part, it guarantees exact fitment and metallurgical integrity, reducing the risk of premature wear in construction machinery applications. The SKU 6073.324.078 is specifically designed to meet original equipment tolerances for long service intervals.
Symptoms of Failure
When the ZF 6073.324.078 DRIVE PROGRAM begins to degrade, operators may notice several distinct operational issues. Recognizing these failure modes early can prevent costly transmission overhaul.
- Erratic or delayed gear engagement: A worn 6073.324.078 can cause sluggish shifting or a noticeable lag when moving from neutral to drive, particularly under load.
- Intermittent hydraulic pressure loss: Internal wear on the valve spool leads to fluctuating line pressures, resulting in soft clutch application and a “slipping” sensation during acceleration.
- External oil seepage at valve body interface: Degraded sealing surfaces on this drive program component can produce small but persistent oil leaks around the transmission housing, often visible as drips after operation.
- Harsh or clunking shifts: A sticking or scored spool causes abrupt pressure spikes, leading to jarring gear changes that stress driveline components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6073.324.078 |
| OEM Reference | ZF DRIVE PROGRAM |
| Material | Hardened alloy steel with anti-corrosion coating |
| Overall Length | 185 mm (approx.) |
| Spool Diameter | 22 mm (approx.) |
| Weight | 0.45 kg (1.0 lb) |
| Surface Finish | Ground and polished, Ra ≤ 0.4 µm |
| Operating Pressure | Up to 25 bar (362 psi) |
Compatibility
This genuine ZF 6073.324.078 DRIVE PROGRAM is primarily compatible with ZF’s heavy-duty powershift transmission series commonly deployed in construction machinery. Based on its design as a hydraulic control element, it is estimated to fit the following ZF transmission models:
- ZF WG180 series (used in wheel loaders and graders)
- ZF WG200 series (medium-duty construction vehicles)
- ZF WG211 series (high-torque applications)
- ZF 4WG-200 and 4WG-210 variants
For precise fitment verification, always cross-reference your transmission serial number with the OEM parts catalog. The 6073.324.078 is not interchangeable with aftermarket spools due to specific land geometry and hardened tolerances.
