Overview
The ZF 0501.213.997 PRESSURE REGULATOR is a precision-engineered hydraulic control component designed for the valve body assembly in ZF’s WG series powershift transmissions. This OEM genuine part modulates hydraulic pressure to ensure smooth clutch engagement and consistent gear shifts under varying load conditions. Located within the control unit housing, the regulator works in tandem with the 4646123011 CONTROL UNIT to maintain optimal line pressure. The SKU 0501.213.997 is manufactured to ZF’s original tolerances, guaranteeing direct fitment and long service life in heavy-duty industrial applications.
Symptoms of Failure
- Erratic shifting or gear slipping under load: A worn pressure regulator causes inconsistent hydraulic pressure, leading to delayed or harsh shifts, particularly in WG260 and WG261 transmissions.
- Transmission overheating due to constant clutch slip: When the 0501.213.997 fails to maintain proper backpressure, clutches may drag, generating excessive heat and reducing fluid life.
- Oil leaks around the valve body or control housing: Degraded sealing surfaces on the regulator can allow ATF to bypass, often requiring replacement of the 0634316523 O-RING during installation.
- Low line pressure warnings or diagnostic fault codes: Electronic control units detect pressure deviations, triggering alarms that trace back to a faulty pressure regulator in the WG311 series.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.213.997 |
| OEM Reference | ZF 0501.213.997 |
| Material | Hardened steel body with anodized aluminum spool |
| Weight | 0.34 kg (0.75 lbs) |
| Dimensions (L x W x H) | 62 mm x 28 mm x 28 mm |
| Thread Size | M14 x 1.5 (inlet port) |
| Operating Pressure Range | 8–22 bar (116–319 psi) |
Compatibility
This pressure regulator is a direct replacement for ZF WG series transmissions, including the WG94, WG160, WG190, WG191, WG210, WG211, WG230, WG260, WG261, WG310, and WG311 models. It is specifically calibrated for the WG260 and WG261 valve blocks but fits all listed series when used with the correct 0636115293 螺栓 and 0736300232 螺栓 for secure mounting. For WG311 applications, verify that the 4475280208 SCREW PLUG is torqued to specification to prevent cross-threading.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Mounting bolt for valve block assembly |
| 0736300232 | 螺栓 | Hex head bolt for control housing |
| 4475280208 | SCREW PLUG | Seals pressure test ports |
| 0634316523 | O-RING | Seals regulator to valve body |
| 4656306171 | VALVE BLOCK | Houses pressure regulator and shift valves |
| 4656306190 | CONNECTING HOUSING | Links valve block to transmission case |
| 0736300094 | TORX SCREW | Fastens connecting housing |
| 4475280047 | SCREW-IN SLEEVE | Hydraulic port adapter |
| 0634306010 | O形圈 | Seals screw-in sleeve |
| 4646123011 | CONTROL UNIT | Electronic pressure management module |
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