Overview
The ZF 0732.042.340 COMPRESSION SPRING is a critical OEM genuine component engineered for the WG100, WG130, and WG131 transmission series. This precision spring resides within the valve body assembly, where it provides the necessary preload force to control hydraulic pressure regulation and clutch pack engagement. By maintaining consistent tension on the spool valves, the 0732.042.340 ensures smooth shift timing and prevents pressure loss during high-torque operations. When paired with the 4143101016 HOUSING, this spring forms the backbone of the transmission’s hydraulic control circuit. The SKU 0732.042.340 is manufactured to ZF’s exacting tolerances, guaranteeing a service life that matches the original assembly specifications.
Symptoms of Failure
- Delayed or harsh shifting: A worn compression spring loses its calibrated tension, causing erratic clutch engagement and noticeable shift shock during gear changes.
- Transmission slipping under load: When the spring fails to maintain proper valve pressure, the transmission may slip between gears, particularly when climbing grades or towing heavy loads.
- Intermittent loss of drive: A broken or fatigued spring can cause sudden pressure drops, resulting in temporary neutral conditions or failure to engage forward or reverse gears.
- Hydraulic fluid contamination: Metal fragments from a fractured spring can circulate through the system, damaging the 4143301039 HOUSING and other precision components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0732.042.340 |
| Material | Chrome Silicon Alloy Steel (DIN 17223) |
| Wire Diameter | 2.5 mm |
| Outer Diameter | 18.0 mm |
| Free Length | 42.5 mm |
| Spring Rate | 12.4 N/mm |
| Weight | 0.012 kg |
| OEM Reference | ZF 0732.042.340 |
| Finish | Phosphate coated with oil dip |
Compatibility
This compression spring is specifically designed for ZF’s WG-series powershift transmissions. Direct fitment includes the WG100, WG130, and WG131 models commonly used in agricultural tractors, construction loaders, and industrial material handlers. The spring also serves as a replacement in the WG180 and WG200 series when used in the main pressure regulator valve stack. Always verify the spring’s free length against your existing component before installation. For complete valve body restoration, consider replacing the 0501318136 GASKET and 0636101084 CAP SCREW to ensure a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101016 | HOUSING | Main valve body housing for hydraulic control |
| 4143301039 | HOUSING | Secondary housing for clutch pressure regulation |
| 0501318136 | GASKET | Seals mating surfaces between housings |
| 0636101084 | CAP SCREW | Fastens housing assemblies with precise torque |
| 0750108044 | PLUG | Closes unused hydraulic ports |
| 0636302014 | SCREW PLUG | Threaded seal for pressure test points |
| 0634801057 | SEALING RING | Copper washer for high-pressure fittings |
| 0730365092 | TYPE PLATE | Identification plate with transmission serial number |
| 4143201019 | VALVE INSERT | Precision bore insert for spool valve alignment |
| 0634306198 | O-RING | Elastomeric seal for valve body passages |
