Overview
The ZF 5838.300.252 PLANETARY GEAR is a critical load-bearing component engineered for the WG100, WG130, and WG131 transmission series. This genuine OEM part functions as the central torque-splitting element within the planetary gearset, directly transferring rotational force from the sun gear to the carrier assembly. The SKU 5838.300.252 is precision-machined to maintain exact gear mesh alignment, ensuring smooth power delivery under high-stress industrial conditions. When installed alongside a 5838109010: DIFFERENTIAL, this planetary gear forms the core of the final drive reduction system.
Symptoms of Failure
- Intermittent gear slipping under load — Worn planetary gear teeth cause momentary loss of torque transfer, particularly during uphill hauling or heavy-start operations.
- Metallic grinding noise from transmission housing — Pitting or spalling on the gear flanks produces a distinct high-pitched whine that escalates with vehicle speed.
- Contaminated transmission fluid with metallic debris — Flakes of hardened steel in the oil pan indicate advanced wear of the planetary gear surface hardening.
- Erratic shift engagement — A failing gear disrupts hydraulic pressure feedback, causing delayed or harsh clutch pack application.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.252 |
| Gear Type | Helical planetary pinion |
| Outer Diameter | 112.5 mm (est.) |
| Inner Bore Diameter | 42.0 mm (est.) |
| Face Width | 38.0 mm (est.) |
| Material | Case-hardened 20MnCr5 alloy steel |
| Weight | 1.85 kg (est.) |
| OEM Reference | ZF 5838.300.252 |
| Hardness | 58-62 HRC (surface) |
Compatibility
This genuine planetary gear is specifically designed for the ZF WG100, WG130, and WG131 powershift transmissions. It is also compatible with select WG180 and WG200 variants that share the same planetary carrier geometry. The 5838.300.252 interfaces directly with the 0750117075: TAPER ROLLER BEARING for axial load support and mates with the 2093209023: DIFFERENTIAL assembly for torque distribution. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109010 | DIFFERENTIAL | Distributes torque between output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial gear loads |
| 2093209023 | DIFFERENTIAL | Secondary torque split unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Secures planetary gear to carrier |
| 5838300811 | THRUST WASHER | Reduces axial friction on gear faces |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 5838300633 | AXLE | Rotates wheel hub assembly |
| 5838300753 | THRUST WASHER | Controls end-play in planetary set |
| 5838300818 | THRUST WASHER | Secondary axial clearance shim |
Frequently Asked Questions
Q: Can the 5838.300.252 planetary gear be replaced without removing the entire transmission?
A: In most WG100/WG130 applications, the planetary gear can be accessed by removing the rear cover and differential housing. However, the 5838300626: DIFFERENTIAL HOUSING must be unbolted first to expose the gear carrier.
Q: What is the typical service life of this planetary gear under normal operating conditions?
A: With proper lubrication and load management, the 5838.300.252 typically lasts 8,000–12,000 operating hours. Premature failure often results from contaminated oil or overloading beyond the transmission’s rated torque.
Q: Does this part require any special tools for installation?
A: Yes, a bearing puller and a press are recommended to install the 0750117075: TAPER ROLLER BEARING onto the gear shaft. A torque wrench calibrated to ZF specifications is essential for the retaining bolt.
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ZF 5838.300.252 PLANETARY GEAR – Gear RFQ Support
ZF 5838.300.252 PLANETARY GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 5838.300.252 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: DIFFERENTIAL
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 | 5838.300.252 |
|---|---|
| Normalized SKU | 5838300252 |
| Part name | PLANETARY GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
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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- ZF 4143.142.022 GEAR SHIFT SENSOR
