Overview
The ZF 4642.351.028 SPUR GEAR is a critical power transmission component engineered specifically for the WG 150 series. This OEM genuine part functions as the primary gear within the planetary gearset, directly transferring torque from the input shaft to the intermediate shaft assembly. Precision-machined from case-hardened alloy steel, the SKU 4642.351.028 ensures minimal backlash and optimal load distribution across the transmission’s gear train. It is housed within the main gearbox casing, working in concert with the 4642101109: TRANSMISSION HOUSING and the 4642301205: TRANSMISSION HOUSING to maintain structural integrity under high-torque conditions.
Symptoms of Failure
- Whining or grinding noise during gear engagement: Worn spur gear teeth produce a distinct high-pitched whine, especially under load, indicating surface fatigue or pitting.
- Intermittent power loss or gear slipping: As the gear profile degrades, the transmission may momentarily lose torque transfer, causing hesitation or slipping during acceleration.
- Metallic debris in transmission fluid: Flaking or chipped gear teeth introduce ferrous particles into the oil, often visible during routine fluid changes or when inspecting the 4642301168: SCREEN SHEET.
- Vibration through the shift lever or chassis: Uneven wear on the spur gear creates rotational imbalance, transmitting noticeable vibration through the drivetrain.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.351.028 |
| Gear Type | Spur Gear, Helical Cut |
| Material | 20MnCr5 Case-Hardened Alloy Steel |
| Number of Teeth | 28 |
| Module | 4.5 mm |
| Outside Diameter | 135 mm |
| Face Width | 32 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4642.351.028 |
| Hardness | 58-62 HRC (Case) |
Compatibility
This spur gear is primarily designed for the ZF WG 150 series, but its robust construction allows cross-compatibility with several other ZF models. Verified applications include the WG 150, WG 180, and WG 200 transmissions. It also fits select variants of the WG 120 series when used with the correct 0631311009: GROOVED STUD and 0730365125: TYPE PLATE for proper alignment. Always confirm the gear ratio and shaft spline count before installation. The part is not compatible with the WG 250 series without additional adapter components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports the gear train assembly |
| 4642301205 | TRANSMISSION HOUSING | Secondary housing for auxiliary gear sets |
| 0730365125 | TYPE PLATE | Identification plate for transmission model and specs |
| 0631311009 | GROOVED STUD | Alignment and fastening stud for gear positioning |
| 4642301168 | SCREEN SHEET | Oil filtration screen to capture debris |
| 4642301169 | SCREEN SHEET | Secondary oil filtration screen |
| 0636100621 | HEXAGON SCREW | Fastener for housing and cover plate attachment |
| 4642301186 | SCREEN SHEET | Fine mesh screen for hydraulic circuit |
| 4644106085 | SHIFT SYSTEM | Hydraulic shift actuator assembly |
| 4642306050 | COVER PLATE | Sealing cover for transmission access port |
ZF 4642.351.028 SPUR GEAR – Gear RFQ Support
ZF 4642.351.028 SPUR 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 4642.351.028 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 | 4642.351.028 |
|---|---|
| Normalized SKU | 4642351028 |
| 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: 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.
Related Parts
- ZF 4661.302.010 GEAR
- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
