Overview
The ZF 0501.213.416 SET OF SPRINGS is a precision-engineered OEM genuine component designed for the valve body and clutch pack assemblies within ZF WG100, WG130, and WG131 transmissions. This spring set provides the necessary preload and damping force to ensure smooth gear engagement and consistent hydraulic pressure regulation. As a critical element in the transmission’s shift quality, the SKU 0501.213.416 works in concert with the 4143101022 HOUSING and the 4143301044 HOUSING to maintain proper alignment and sealing of the internal oil circuits. Without this spring set, the transmission cannot maintain the necessary clamping force for torque transfer.
Symptoms of Failure
- Delayed or harsh gear engagement: When the springs lose tension, you may notice a lag when shifting from Neutral to Drive or Reverse, often accompanied by a jarring thud.
- Intermittent clutch slip under load: Worn springs reduce clamping force, causing the transmission to slip during acceleration or when climbing grades.
- Erratic shift timing: The valve body relies on spring pressure to modulate shift points; failure leads to unpredictable upshifts or downshifts.
- Hydraulic fluid leaks near the valve body: Degraded springs can cause misalignment of the 0631329135 SPRING PIN, leading to seal breaches and external oil seepage.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.213.416 |
| Material | High-tensile spring steel (DIN 17223) |
| Wire Diameter | 2.5 mm |
| Outer Diameter | 18.0 mm |
| Free Length | 35.0 mm |
| Total Coils | 8.5 |
| Weight | 0.012 kg |
| OEM Reference | ZF 0501.213.416 |
Compatibility
This spring set is engineered specifically for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with certain variants of the WG180 and WG200 series where the valve body uses the same spring pocket dimensions. Always verify the spring seat condition in the 0636302014 SCREW PLUG bore before installation. For heavy-duty applications, pairing this set with a new 0634801057 SEALING RING is recommended to prevent cross-threading.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101022 | HOUSING | Encloses the valve body and spring assembly |
| 4143301044 | HOUSING | Secondary housing for clutch pack alignment |
| 0631329135 | SPRING PIN | Secures spring position within the bore |
| 0636302014 | SCREW PLUG | Seals the spring chamber from debris |
| 0634801057 | SEALING RING | Prevents oil bypass around the plug |
| 4143301053 | CONNECTING PART | Links spring force to shift fork |
| 0636100600 | CAP SCREW | Fastens housing to transmission case |
| 0636101024 | CAP SCREW | Alternate thread pitch for deep bores |
| 0730365159 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Anchors spring assembly to valve body |
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