Overview
The ZF 4143.303.046 HELICAL GEAR is a precision-engineered component designed for the auxiliary drive and power take-off (PTO) systems within ZF WG100, WG130, and WG131 transmissions. This OEM genuine part transfers rotational force smoothly between parallel shafts, reducing noise and vibration through its angled tooth profile. As a critical element of the gear train, it ensures consistent torque delivery in heavy-duty industrial applications. The SKU 4143.303.046 is manufactured to exacting ZF tolerances, guaranteeing a direct fit and long service life when paired with the correct 4143101016 HOUSING and 4143301039 HOUSING assemblies.
Symptoms of Failure
- Whining or howling noise during PTO engagement: A worn helical gear produces a distinct high-pitched whine under load, often mistaken for bearing failure. This indicates tooth surface pitting or uneven wear.
- Intermittent power loss to auxiliary equipment: When the gear teeth lose their precise profile, the transmission may slip under heavy torque, causing pumps or generators to lose RPM unexpectedly.
- Metallic debris in transmission oil: Flakes or fine silver particles found during oil changes point directly to helical gear degradation. This often accompanies a failing 0501318136 GASKET, allowing contamination to spread.
- Vibration through the gearshift lever or chassis: Uneven tooth contact creates harmonic vibrations that resonate through the driveline, especially at specific RPM ranges.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.303.046 |
| Type | Helical Gear, Single Helix |
| Material | Case-Hardened Alloy Steel (20MnCr5 equivalent) |
| Outside Diameter | ~120 mm (estimated) |
| Face Width | ~35 mm (estimated) |
| Bore Diameter | ~30 mm (estimated) |
| Weight | ~1.8 kg (4.0 lbs) |
| OEM Reference | ZF 4143.303.046 |
| Hardness | 58-62 HRC |
Compatibility
This helical gear is specifically engineered for ZF WG100, WG130, and WG131 series transmissions. It is also compatible with the HL 100 and HL 270 series transfer cases where auxiliary drive gears are shared. While primarily designed for these models, the 4143.303.046 may fit WG180 and WG200 variants that utilize the same gear train architecture. Always verify by cross-referencing the existing gear’s tooth count and helix angle. For installation, ensure the 0636101084 CAP SCREW is torqued to factory specifications to prevent axial play.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101016 | HOUSING | Encloses the gear set, providing alignment and oil retention |
| 4143301039 | HOUSING | Secondary housing for PTO output shaft support |
| 0501318136 | GASKET | Seals the housing interface to prevent oil leaks |
| 0636101084 | CAP SCREW | Fastens the gear to the shaft with precise clamping force |
| 0750108044 | PLUG | Closes unused ports in the housing |
| 0636302014 | SCREW PLUG | Threaded plug for oil drain or fill points |
| 0634801057 | SEALING RING | Provides a static seal under the screw plug |
| 0730365092 | TYPE PLATE | Identification plate riveted to the housing |
| 4143201019 | VALVE INSERT | Hydraulic control valve for clutch modulation |
| 0634306198 | O-RING | Seals the valve insert within the housing bore |
ZF 4143.303.046 HELICAL GEAR – Gear RFQ Support
ZF 4143.303.046 HELICAL 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 4143.303.046 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: OUTPUT
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 | 4143.303.046 |
|---|---|
| Normalized SKU | 4143303046 |
| Part name | HELICAL 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
