Overview
The ZF 4642.252.057 SPUR GEAR is a critical power transmission component engineered specifically for the WG 150 series transmission. This OEM genuine part functions as a precision-machined gear that transfers rotational force between parallel shafts within the gear train, ensuring smooth torque delivery and reliable load distribution under heavy-duty industrial conditions. The SKU 4642.252.057 is designed to maintain exacting tolerances, reducing vibration and noise while extending the operational life of the transmission assembly. It sits within the intermediate shaft cluster, directly meshing with adjacent gears to facilitate efficient power flow from the input to the output shaft.
Symptoms of Failure
When the ZF 4642.252.057 spur gear begins to wear, operators may notice distinct performance issues. Gear slipping under load is a common symptom, often accompanied by a sudden loss of torque during acceleration or uphill operation. Metallic grinding noises emanating from the transmission housing indicate tooth surface fatigue or pitting. Increased operating temperature due to friction from worn gear teeth can lead to premature fluid degradation. Vibration during gear engagement at specific RPM ranges suggests uneven tooth wear or backlash issues, which can escalate into catastrophic failure if ignored.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.252.057 |
| Gear Type | Spur Gear (Straight-Cut) |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Module | 4.5 mm |
| Number of Teeth | 28 |
| Outside Diameter | 135 mm |
| Face Width | 32 mm |
| Bore Diameter | 45 mm |
| Weight | 1.85 kg |
| Hardness | 58-62 HRC |
| OEM Reference | ZF 4642.252.057 |
Compatibility
This spur gear is primarily designed for the ZF WG 150 series transmission, but it also fits select variants within the broader WG family. Compatible models include the WG 150, WG 180, and WG 200 series, provided the gear cluster configuration matches. Always verify the tooth count and shaft spacing against your transmission’s service manual before installation. The part integrates directly with the 4642101114: TRANSMISSION HOUSING and the 4642301213: TRANSMISSION HOUSING, which enclose the gear train. Proper alignment is ensured using the 0631311009: GROOVED STUD for precise positioning, while the 0730365125: TYPE PLATE provides essential identification for the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101114 | TRANSMISSION HOUSING | Encloses and supports gear train components |
| 4642301213 | TRANSMISSION HOUSING | Alternate housing for WG series variants |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Alignment stud for housing assembly |
| 4642301168 | SCREEN SHEET | Oil filtration screen for debris protection |
| 4642301169 | SCREEN SHEET | Secondary oil screen for enhanced filtration |
| 0636100621 | HEXAGON SCREW | Fastener for securing housing components |
| 4642301186 | SCREEN SHEET | Fine-mesh screen for hydraulic circuits |
| 4644106300 | SHIFT SYSTEM | Controls gear engagement and selection |
| 4644306500 | COVER PLATE | Seals and protects internal gear assembly |
ZF 4642.252.057 SPUR GEAR – Gear RFQ Support
Use ZF 4642.252.057 SPUR GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4642.252.057 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: COUPLING
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 | 4642.252.057 |
|---|---|
| Normalized SKU | 4642252057 |
| Part name | SPUR 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: diagram. 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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