Overview
The ZF 4143.352.034 PRESSURE PART is a critical hydraulic component engineered to regulate fluid pressure within the valve body assembly of select ZF powershift transmissions. This OEM genuine part ensures precise clutch engagement and disengagement by maintaining consistent oil pressure across the hydraulic circuit. The SKU 4143.352.034 is specifically designed for the HL 100 Series and HL 270 Series, functioning as a pressure-limiting spool or piston that modulates flow to prevent system overload. When installed alongside the 4143101016 HOUSING and the 4143301039 HOUSING, this part forms a sealed pressure chamber critical for transmission longevity.
Symptoms of Failure
- Erratic gear engagement or slipping: A worn pressure part fails to hold consistent hydraulic pressure, causing clutches to slip under load—especially noticeable during low-speed maneuvering.
- Internal oil leaks and pressure loss: Degraded sealing surfaces allow transmission fluid to bypass the valve, resulting in visible drips near the valve body or a drop in the pressure gauge reading.
- Delayed shift response or harsh shifting: When the pressure part sticks or wears unevenly, shift timing becomes unpredictable, often accompanied by a hard “clunk” during gear changes.
- Overheating transmission fluid: Continuous pressure loss forces the pump to work harder, raising fluid temperatures and accelerating wear on adjacent components like the 0501318136 GASKET.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.352.034 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.18 kg (0.40 lbs) |
| Length | 42.5 mm |
| Outer Diameter | 18.0 mm |
| OEM Reference | ZF 4143.352.034 |
| Sealing Type | Precision ground spool with O-ring groove |
Compatibility
This pressure part is a direct fit for ZF HL 100 Series and HL 270 Series transmissions. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct 0636101084 CAP SCREW and housing assembly. Additional models that may utilize this component include the WG150 and WG210, provided the valve body configuration matches the HL platform design. Always verify your transmission serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101016 | HOUSING | Encloses the pressure part and directs oil flow |
| 4143301039 | HOUSING | Secondary housing for valve body support |
| 0501318136 | GASKET | Seals mating surfaces to prevent fluid leaks |
| 0636101084 | CAP SCREW | Secures housing components under torque |
| 0750108044 | PLUG | Closes unused ports in the valve body |
| 0636302014 | SCREW PLUG | Threaded seal for pressure test points |
| 0634801057 | SEALING RING | Provides static seal under high pressure |
| 0730365092 | TYPE PLATE | Identification plate for transmission model |
| 4143201019 | VALVE INSERT | Regulates oil flow direction within the body |
| 0634306198 | O-RING | Dynamic seal for the pressure part spool |
