Overview
The ZF 4143.135.406 SPUR GEAR DRIVE is a precision-machined component engineered for the auxiliary power take-off (PTO) systems within ZF WG100, WG130, and WG131 transmissions. This genuine OEM part transfers rotational force from the transmission’s internal gear train to the PTO output shaft, enabling reliable hydraulic pump or auxiliary equipment operation. The spur gear drive sits directly within the transmission housing assembly, meshing with the main shaft gear cluster. The SKU 4143.135.406 is manufactured to ZF’s exacting tolerances, ensuring minimal backlash and consistent torque delivery under heavy industrial loads.
Symptoms of Failure
- Whining or grinding noise during PTO engagement: A worn spur gear drive produces a high-pitched whine or metallic grinding sound when the PTO is activated, indicating tooth surface wear or pitting.
- Intermittent PTO slippage under load: If the gear teeth have chipped or worn unevenly, the PTO may slip or fail to maintain consistent RPM when driving hydraulic pumps, leading to reduced system pressure.
- Metallic debris in transmission fluid: Advanced gear wear sheds fine metal particles into the oil, visible during fluid changes or as sludge on the magnetic drain plug, often accompanied by a burnt odor.
- Vibration at the PTO output flange: Excessive gear wear causes imbalance, transmitting noticeable vibration through the PTO shaft and into attached equipment, especially at higher operating speeds.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4143.135.406 |
| Type | Spur Gear Drive (PTO Drive Gear) |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Number of Teeth | 23 (estimated) |
| Module | 3.0 (estimated) |
| Outside Diameter | 75.0 mm (estimated) |
| Bore Diameter | 20.0 mm (estimated) |
| Face Width | 25.0 mm (estimated) |
| Weight | 0.45 kg (estimated) |
| OEM Reference | ZF 4143.135.406 |
Compatibility
This spur gear drive is specifically designed for ZF’s WG-series industrial transmissions. It is a direct fit for the WG100, WG130, and WG131 models. Based on its gear geometry and mounting pattern, it is also compatible with the WG180 and WG200 series when used in standard PTO configurations. Always verify the gear count and shaft diameter against your existing part before installation. The gear interfaces with the 4143101009 HOUSING and 4143301025 HOUSING to maintain proper alignment. During reassembly, replace the 0634313603 O-RING and 4475280018 SCREW PLUG to prevent fluid leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses and supports the spur gear drive assembly |
| 4143301025 | HOUSING | Secondary housing for PTO gear alignment |
| 0634313603 | O-RING | Seals the housing joint to prevent oil leaks |
| 4475280018 | SCREW PLUG | Closes the housing access port |
| 0501342341 | SUPPORT RING | Provides axial support for the gear shaft |
| 4143298457 | SEAL KIT | Contains all seals for PTO housing overhaul |
| 0634313591 | O-RING | Seals the gear shaft bore |
| 0636101068 | CAP SCREW | Fastens the housing cover |
| 4143221013 | THROTTLE VALVE | Controls PTO engagement oil flow |
| 0634304484 | O-RING | Seals the throttle valve port |
ZF 4143.135.406 SPUR GEAR DRIVE – Gear RFQ Support
ZF 4143.135.406 SPUR GEAR DRIVE 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 4143.135.406 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: SPUR GEAR DRIVE
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 | 4143.135.406 |
|---|---|
| Normalized SKU | 4143135406 |
| Part name | SPUR GEAR DRIVE |
| 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.
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
