Overview
The ZF 0732.041.502 COMPRESSION SPRING is a precision-engineered OEM genuine component designed for the WG200, WG92, and WG98 series transmissions. This spring plays a critical role in maintaining consistent pressure within the valve body assembly, ensuring smooth clutch engagement and hydraulic circuit regulation. As a factory-original part, the SKU 0732.041.502 guarantees exact dimensional tolerances and material composition required for reliable operation in heavy-duty commercial vehicles and industrial machinery. When installed alongside the 4660198001 PERIPHERALS kit, it contributes to overall system integrity by stabilizing hydraulic flow within the 4660101011 TRANSMISSION HOUSING.
Symptoms of Failure
- Erratic gear engagement or delayed shifting – A worn compression spring loses its calibrated force, causing hesitation when the transmission attempts to shift between ranges.
- Intermittent hydraulic pressure loss – This manifests as soft or slipping clutches, particularly under load, and may trigger fault codes related to pressure regulation.
- Audible clicking or rattling from the valve body – A fatigued spring can produce metallic noises as it fails to maintain proper contact with adjacent components like the 0501209818 RANGE SELECTOR.
- Oil contamination from metal debris – Spring breakage introduces small fragments into the hydraulic circuit, accelerating wear on seals and the 4660301018 HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0732.041.502 |
| Material | Chrome-silicon alloy steel (DIN 17223) |
| Wire Diameter | 2.5 mm |
| Outer Diameter | 18.0 mm |
| Free Length | 45.0 mm |
| Spring Rate | 12.5 N/mm |
| Weight | 0.012 kg |
| OEM Reference | ZF 0732.041.502 |
Compatibility
This compression spring is engineered for ZF WG-series transmissions, specifically the WG180, WG200, WG92, and WG98 models. It is a direct replacement for original equipment in valve body assemblies used in ZF Ecomat and Ecolife derivative transmissions. Always verify the spring seat condition within the 4660101011 TRANSMISSION HOUSING before installation to ensure proper preload. The part also interfaces with the 0501209818 RANGE SELECTOR mechanism and should be replaced in conjunction with the 4660198001 PERIPHERALS kit for optimal performance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0631306174 | CYLINDRICAL PIN | Aligns valve body components |
| 0769123894 | TYPE PLATE | Identification and serialization |
| 4660221012 | SUCTION TUBE | Oil intake from sump |
| 0634100317 | O-RING | Hydraulic seal between passages |
| 0636103273 | CAP SCREW | Fastens housing sections |
| 0750100022 | SCREW PLUG | Closes pressure test ports |
