Overview
The ZF 0501.214.991 VALVE is a precision hydraulic control component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part regulates oil flow and pressure within the valve body assembly, directly influencing shift timing and clutch engagement. The SKU 0501.214.991 is positioned in the lower valve block section, where it interfaces with the 4143101022: HOUSING to direct fluid to specific circuits. Without this valve, the transmission cannot modulate line pressure for smooth gear changes.
Symptoms of Failure
- Delayed or harsh shifting: A worn 0501.214.991 valve causes erratic clutch pack engagement, leading to jarring upshifts or slipping between gears.
- Transmission overheating: When the valve fails to maintain proper hydraulic pressure, internal friction increases, raising fluid temperature beyond normal operating ranges.
- Oil leaks around the valve body: Degraded sealing surfaces allow ATF to escape past the 0636302014: SCREW PLUG and adjacent 4143301044: HOUSING, leaving visible drips under the bell housing.
- Intermittent loss of drive: A sticking valve spool can temporarily block oil flow, causing the transmission to drop into neutral without warning.
Technical Specifications
| Part Number | 0501.214.991 |
| OEM Reference | ZF 0501.214.991 |
| Material | Hardened steel with anodized aluminum body |
| Weight | 0.34 kg (0.75 lbs) |
| Dimensions | 85 mm x 32 mm x 28 mm |
| Operating Pressure | 12–18 bar (174–261 psi) |
| Seal Type | Nitrile rubber O-rings (included) |
Compatibility
This valve is designed for ZF WG series powershift transmissions used in construction and agricultural machinery. It fits the WG100, WG130, and WG131 models directly. The 0501.214.991 also works in WG180 and WG200 variants when paired with the correct 0631329135: SPRING PIN for alignment. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101022 | HOUSING | Encloses valve assembly and directs oil flow |
| 4143301044 | HOUSING | Secondary housing for pressure regulation |
| 0631329135 | SPRING PIN | Secures valve spool alignment |
| 0636302014 | SCREW PLUG | Seals hydraulic passages in valve body |
| 0634801057 | SEALING RING | Prevents fluid bypass at connection points |
| 4143301053 | CONNECTING PART | Links valve to transmission oil pump |
| 0636100600 | CAP SCREW | Fastens valve cover to housing |
| 0636101024 | CAP SCREW | M6 bolt for secondary mounting points |
| 0730365159 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for valve body installation |
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