Overview
The ZF 0501.330.017 PRESSURE REGULATOR is a precision hydraulic control component engineered specifically for the WG 94 Series transmission family. This OEM genuine part governs the modulation of hydraulic pressure within the valve body assembly, ensuring consistent clutch and brake application during gear shifts. Installed directly in the main control unit, the 0501.330.017 works in concert with the 4661101046: HOUSING and the 4661301125: HOUSING II to maintain stable oil flow. The SKU 0501.330.017 is a direct replacement for worn units, restoring factory-specified pressure curves and preventing erratic shift behavior.
Symptoms of Failure
- Erratic shift timing and gear slipping – When the pressure regulator loses its calibration, the transmission may delay engagement or slip between gears, especially under load. This is a common long-tail search query for “ZF WG94 slipping under acceleration.”
- Oil leaks around the valve body – A worn 0501.330.017 can cause internal leakage past the spool, leading to external seepage at the 0631306174: CYLINDRICAL PIN interface. Search terms like “ZF transmission pressure regulator oil leak” apply here.
- Harsh or flared upshifts – Inconsistent pressure regulation results in abrupt clutch engagement or prolonged slipping during 2-3 and 3-4 shifts, often reported as “ZF WG94 hard shifting.”
- Low line pressure warnings – Diagnostic codes for insufficient main pressure frequently trace back to a failing regulator, particularly when the 0769123894: TYPE PLATE indicates a mismatch in calibration.
Technical Specifications
| Part Number | 0501.330.017 |
| Type | Hydraulic Pressure Regulator (Spool Valve) |
| Material | Hardened Steel / Anodized Aluminum |
| Weight | 0.18 kg (0.40 lbs) |
| Length | 62 mm |
| Diameter | 22 mm (valve bore) |
| OEM Reference | ZF 0501.330.017 |
| Operating Pressure | 8–22 bar |
| Seal Type | O-Ring / Backup Ring |
Compatibility
This pressure regulator is engineered for the ZF WG 94 Series, which includes the WG94, WG180, WG200, and WG210 transmission models. It is also compatible with certain WG 90 variants used in medium-duty trucks and construction equipment. The 0501.330.017 directly replaces earlier revisions (0501.330.010, 0501.330.012) and requires no adapter modifications. Always verify the 0769123894: TYPE PLATE for exact model confirmation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101046 | HOUSING | Main valve body housing for pressure regulation |
| 4661301125 | HOUSING II | Secondary housing for auxiliary circuits |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for valve body assembly |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Sealing plug for pressure test ports |
| 4660201008 | SCREW PLUG | Threaded plug for oil gallery closure |
| 0636100117 | SCREW PLUG | M10 plug for valve body retention |
| 0501211384 | VALVE | Shift valve for clutch modulation |
| 0732042156 | COMPRESSION SPRING | Return spring for regulator spool |
| 0768409154 | SCREW PLUG | Sealing plug for accumulator bore |
