Overview
The ZF 4143.135.006 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 OEM genuine part transfers rotational torque from the transmission’s internal gear train to the PTO output shaft, enabling reliable hydraulic pump or auxiliary equipment operation. The SKU 4143.135.006 sits directly within the gear housing assembly, meshing with the main shaft’s drive gear to ensure synchronized power delivery. As a critical element of the driveline, this spur gear drive must maintain exact tooth geometry and surface hardness to prevent premature wear under continuous load conditions.
Symptoms of Failure
- Whining or grinding noise during PTO engagement: A worn 4143.135.006 gear drive produces a high-pitched whine or metallic grinding sound when the auxiliary system is activated, indicating tooth surface degradation or pitting.
- Intermittent PTO slipping under load: If the spur gear drive loses tooth profile integrity, the PTO may slip or fail to maintain consistent RPM when driving hydraulic pumps, leading to erratic equipment performance.
- Metal debris in transmission fluid: Excessive wear on the gear drive sheds fine metallic particles into the oil, often visible during routine fluid changes or as sludge in the filter.
- Vibration through the transmission housing: A damaged spur gear drive causes noticeable vibration at the PTO mounting flange, which can accelerate bearing wear in the 4143101016: HOUSING assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.135.006 |
| Gear Type | Spur Gear Drive (Helical Cut) |
| Material | Case-Hardened Alloy Steel (20MnCr5) |
| Number of Teeth | 23 |
| Module | 4.5 mm |
| Pressure Angle | 20° |
| Outside Diameter | 112.5 mm |
| Bore Diameter | 35 mm (H7 tolerance) |
| Face Width | 32 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4143.135.006 |
| Surface Hardness | 58-62 HRC |
Compatibility
This spur gear drive is specifically designed for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the HL 100 Series and HL 270 Series auxiliary drive housings. The gear drive interfaces directly with the 4143301039: HOUSING and requires a new 0501318136: GASKET during installation to prevent oil seepage. Secure mounting is achieved using 0636101084: CAP SCREW fasteners, which must be torqued to factory specifications. While primarily used in WG100/WG130/WG131, this part may also fit WG180 and WG200 variants when the PTO housing configuration matches.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101016 | HOUSING | Encloses the gear drive assembly |
| 4143301039 | HOUSING | Secondary housing for PTO shaft support |
| 0501318136 | GASKET | Seals housing mating surfaces |
| 0636101084 | CAP SCREW | Secures housing to transmission |
| 0750108044 | PLUG | Closes unused PTO ports |
| 0636302014 | SCREW PLUG | Threaded plug for oil drain/fill |
| 0634801057 | SEALING RING | Prevents fluid leaks at plug interfaces |
| 0730365092 | TYPE PLATE | Identification plate for transmission model |
| 4143201019 | VALVE INSERT | Hydraulic control valve for PTO engagement |
| 0634306198 | O-RING | Seals valve insert and hydraulic passages |
ZF 4143.135.006 SPUR GEAR DRIVE – Gear RFQ Support
ZF 4143.135.006 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 4143.135.006 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 | 4143.135.006 |
|---|---|
| Normalized SKU | 4143135006 |
| 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: 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
