Overview
The ZF 2097.329.004 PIN is a precision-machined locating and retaining component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part, identified by SKU 2097.329.004, sits within the planetary gear assembly and differential housing, where it functions as a critical alignment pin for spring packs and fastener assemblies. By securing the spring tension against the differential carrier, this pin ensures consistent gear mesh and prevents axial movement of the 2093109018 DIFFERENTIAL components. Without this pin, the entire 5838300626 DIFFERENTIAL HOUSING assembly would experience excessive play, leading to accelerated wear on adjacent bearings and gears.
Symptoms of Failure
When the 2097.329.004 pin wears or fractures, operators typically notice these specific failure modes:
- Intermittent gear slipping under load – A worn pin allows the spring pack to shift, reducing clamping force on the 2093209023 DIFFERENTIAL gears, causing momentary power loss during acceleration.
- Metallic rattling from the differential housing – A loose pin creates a distinct tapping noise as it moves within its bore, often mistaken for bearing failure.
- Premature wear of the taper roller bearing – Misalignment from a degraded pin forces the 0750117075 TAPER ROLLER BEARING to operate at an incorrect angle, generating heat and debris.
- Oil contamination with metallic particles – As the pin surface erodes, fine steel particles circulate through the transmission fluid, clogging filters and damaging seals.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2097.329.004 |
| Material | Case-hardened alloy steel (SAE 8620 equivalent) |
| Overall Length | 42.5 mm |
| Diameter (shank) | 12.0 mm |
| Weight | 0.038 kg |
| Surface Finish | Black oxide with phosphate coating |
| OEM Reference | ZF 2097.329.004 (genuine) |
| Hardness | HRC 58-62 (core), HRC 45-50 (case) |
Compatibility
This pin is specifically designed for ZF heavy-duty transmissions in the WG family. It is a direct fit for the following models:
- ZF WG100 (all variants)
- ZF WG130 (including WG130C and WG130E)
- ZF WG131 (all sub-variants)
- ZF WG180 (limited compatibility – verify bore depth)
- ZF WG200 (requires inspection of spring pack configuration)
Always cross-reference your transmission serial number with the OEM parts catalog before installation. The pin interfaces directly with the 0631329088 SPRING PIN and the 5838300811 THRUST WASHER to maintain proper axial clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109018 | DIFFERENTIAL | Distributes torque to axle shafts; houses the pin assembly |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation under load |
| 2093209023 | DIFFERENTIAL | Secondary differential unit for multi-axle configurations |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses the gear set and pin assembly |
| 0631329088 | SPRING PIN | Secures the 2097.329.004 pin in its bore |
| 5838300811 | THRUST WASHER | Reduces axial friction between pin and housing |
| 5838300721 | AXLE BEVEL GEAR | Transfers power from differential to axle shafts |
| 5838300633 | AXLE | Rotates the wheel hubs; driven by bevel gear |
| 5838300753 | THRUST WASHER | Controls end-play in the axle bevel gear assembly |
| 5838300818 | THRUST WASHER | Provides wear surface for differential side gears |
Frequently Asked Questions
Q: Can I reuse the 2097.329.004 pin during a rebuild?
A: ZF recommends replacing this pin every time the differential housing is opened. The pin undergoes work hardening and surface deformation during service; reusing it risks improper spring tension and premature failure of the 0750117075 TAPER ROLLER BEARING.
Q: How do I know if this pin fits my WG130 transmission?
A: Check the bore diameter in your differential housing. The 2097.329.004 pin has a 12.0 mm shank. If your housing uses a 10 mm or 14 mm bore, you need a different pin variant. Always verify against the OEM parts list for your specific transmission serial number.
Q: What torque should I apply to the retaining bolt for this pin?
A: The pin itself is not torqued; it is a slip-fit component retained by the 0631329088 SPRING PIN. The spring pin should be driven flush with the housing surface. No additional fasteners are required for the 2097.329.004.
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Phone: +86 158 2286 3467 |
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