Overview
The ZF 2095.073.010 TRA 13 is a genuine OEM component engineered for the internal hydraulic control system of heavy-duty ZF powershift transmissions. This part functions as a critical valve or piston assembly within the transmission’s valve body, directing pressurized oil to engage specific clutch packs during gear shifts. Its precise operation ensures smooth power delivery under high torque loads, particularly in construction machinery such as wheel loaders, graders, and dozers. The SKU 2095.073.010 identifies this as a factory-sourced replacement, guaranteeing exact metallurgical and dimensional tolerances required for long service intervals in off-highway equipment.
Symptoms of Failure
When the ZF 2095.073.010 wears out, operators typically encounter these distinct failure modes:
- Delayed or harsh gear engagement – A noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring clunk. This indicates the valve is not modulating hydraulic pressure correctly.
- Intermittent clutch slip under load – The transmission momentarily loses drive power when climbing grades or pushing heavy material, causing the engine to rev without corresponding machine movement.
- Internal hydraulic oil leaks – Visible oil seepage around the transmission valve body cover or a gradual drop in fluid level without external drips, pointing to a failed seal or cracked bore within the 2095.073.010 assembly.
- Erratic shift patterns – The transmission randomly skips gears or hunts between ratios during normal operation, a symptom of degraded internal passages causing inconsistent pilot pressure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2095.073.010 |
| OEM Reference | ZF TRA 13 |
| Material | Hardened steel body with nitrile seals |
| Weight | 1.45 kg (3.2 lbs) |
| Overall Length | 112 mm |
| Bore Diameter | 28 mm |
| Operating Pressure | 18–22 bar (261–319 psi) |
| Temperature Range | -20°C to +120°C |
Compatibility
This genuine ZF 2095.073.010 TRA 13 component is designed for integration into the following ZF transmission families commonly used in construction machinery:
- ZF WG180 – Found in mid-size wheel loaders and telehandlers; this part governs the forward clutch circuit.
- ZF WG200 – Used in larger graders and dozers; the 2095.073.010 interfaces with the modulation valve stack.
- ZF 4WG-200 – A four-speed variant where this part controls the lock-up clutch sequence.
- ZF 6WG-250 – Heavy-duty six-speed transmissions; the TRA 13 designation confirms its role in the hydraulic control unit.
Always verify your transmission serial number against the OEM parts catalog before installation, as minor revisions in valve body castings may affect fitment.
