Overview
The ZF 2095.073.011 TRA 13 is an OEM genuine hydraulic control valve assembly engineered for the internal lubrication and clutch actuation circuits within ZF’s heavy-duty powershift transmissions. This specific SKU, 2095.073.011, functions as the primary pressure regulator and flow divider, ensuring precise oil distribution to the torque converter, clutch packs, and cooling system. Mounted directly to the transmission valve body, it modulates hydraulic pressure based on engine load and gear selection. Without this component, the transmission cannot maintain consistent line pressure, leading to immediate operational degradation. As a factory-spec part, the 2095.073.011 guarantees exact fitment and metallurgical integrity for demanding construction machinery applications.
Symptoms of Failure
When the ZF 2095.073.011 begins to wear, operators will notice distinct performance issues. Recognizing these signs early prevents catastrophic transmission damage.
- Erratic clutch engagement and gear slippage under load: A worn spool or bore inside the 2095.073.011 causes internal leakage, reducing clutch apply pressure. The machine may hesitate or slip when climbing grades or lifting heavy loads.
- Chronic transmission overheating: If the valve fails to regulate flow to the torque converter and cooler circuit, fluid temperatures spike rapidly. This often triggers warning lights on the dash and reduces component lifespan.
- Oil leaks from the valve body interface: Degraded O-rings or a cracked housing on the 2095.073.011 allow pressurized hydraulic fluid to escape. Puddles of ATF under the bell housing or near the transmission sump are common indicators.
- Delayed or harsh shifts between forward and reverse: A sticking pilot spool inside this part can cause momentary pressure spikes, resulting in jarring gear changes or a noticeable lag when direction is reversed.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 2095.073.011 |
| Product Designation | TRA 13 (Hydraulic Control Valve) |
| Overall Length | 215 mm (8.46 in) |
| Overall Width | 95 mm (3.74 in) |
| Overall Height | 70 mm (2.76 in) |
| Dry Weight | 1.85 kg (4.08 lbs) |
| Primary Material | High-grade aluminum alloy with hardened steel spool |
| OEM Reference | ZF 2095.073.011 (Genuine) |
| Seal Type | Nitrile rubber (NBR) O-rings |
| Max Operating Pressure | 25 bar (362 psi) |
Compatibility
This genuine ZF 2095.073.011 TRA 13 valve is designed for integration into the following ZF transmission families commonly used in construction machinery:
- ZF WG180 series (WG180, WG180C, WG180E) – used in wheel loaders and telehandlers.
- ZF WG200 series (WG200, WG200C, WG200E) – found in heavy excavators and dozers.
- ZF WG120 series – smaller loaders and backhoe loaders.
- ZF 4WG-200 and 4WG-210 – four-speed powershift variants.
Always verify your transmission serial number against the ZF parts catalog before ordering. The 2095.073.011 is not interchangeable with the TRA 12 or TRA 14 variants due to different port configurations and pressure ratings.
