Overview
The ZF 4108.302.082 PLANETARY GEAR is a critical power-distribution component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part sits within the planetary gearset assembly, where it manages torque splitting between the sun gear and ring gear to achieve the correct gear ratios for heavy-duty industrial applications. The SKU 4108.302.082 ensures precise meshing with adjacent components, including the 4108101112: HOUSING and the 4108201177: HOUSING, which together form the sealed gear chamber. This planetary gear is manufactured from case-hardened alloy steel to withstand continuous high-load cycles without deformation.
Symptoms of Failure
- Erratic gear slipping under load: When the planetary gear teeth wear unevenly, the transmission may momentarily lose torque transfer during acceleration or hill climbs, producing a distinct “chattering” noise.
- Metallic grinding from the gear housing: Worn gear flanks create metal debris that contaminates the oil, leading to audible grinding sounds, especially when shifting between forward and reverse.
- Oil leaks near the bearing cover interface: A failing planetary gear can cause shaft misalignment, which stresses the 0636302056: SCREW PLUG and 4108301304: BEARING COVER, eventually allowing transmission fluid to seep past seals.
- Increased operating temperature: Excessive friction from a damaged planetary gear generates heat, often triggering thermal warning lights on the dashboard or control panel.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4108.302.082 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outer Diameter | 142 mm |
| Inner Bore Diameter | 45 mm |
| Tooth Count | 38 teeth (helical cut) |
| Weight | 2.4 kg |
| OEM Reference | ZF 4108.302.082 |
| Hardness | 58–62 HRC (case depth 0.8–1.2 mm) |
Compatibility
This planetary gear is designed for ZF WG-series transmissions with a torque capacity of 1,000–1,300 Nm. It is a direct fit for the following models: WG100, WG130, and WG131. The gear also integrates with the 4108102042: INPUT shaft and the 4108302099: PLANET CARRIER to complete the planetary set. For optimal sealing, pair this gear with the 4108306173: GASKET and 0750110040: SHAFT SEAL. The 4108302007: BEARINGSHEET and 0635332196: BALL BEARING are also commonly replaced during a planetary gear overhaul to prevent premature wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101112 | HOUSING | Encloses the planetary gear assembly |
| 4108201177 | HOUSING | Secondary housing for gear support |
| 0636302056 | SCREW PLUG | Seals oil passages in the gear housing |
| 4108301304 | BEARING COVER | Protects planetary gear bearings |
| 4108306173 | GASKET | Prevents oil leaks between mating surfaces |
| 0750110040 | SHAFT SEAL | Retains lubricant around the input shaft |
| 4108102042 | INPUT | Transfers engine torque to the planetary set |
| 4108302099 | PLANET CARRIER | Holds planetary gears in correct alignment |
| 4108302007 | BEARINGSHEET | Thrust washer for planetary gear support |
| 0635332196 | BALL BEARING | Reduces rotational friction on the gear shaft |
ZF 4108.302.082 PLANETARY GEAR – Gear RFQ Support
Use ZF 4108.302.082 PLANETARY GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4108.302.082 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: INPUT
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4108.302.082 |
|---|---|
| Normalized SKU | 4108302082 |
| Part name | PLANETARY GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
| Weight | 2.199 |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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