Overview
The ZF 4143.135.002 SPUR GEAR DRIVE is a precision-machined OEM genuine component designed for the auxiliary drive train within ZF WG100, WG130, and WG131 transmission assemblies. This gear transfers rotational force from the input shaft to the oil pump and PTO (Power Take-Off) system, ensuring consistent hydraulic pressure and auxiliary power delivery. The SKU 4143.135.002 sits directly on the intermediate shaft cluster, meshing with the main drive gear to maintain synchronized operation under heavy load. As a hardened steel spur gear, it is engineered to withstand continuous high-torque applications in industrial and marine drivelines.
Symptoms of Failure
- Whining or grinding noise during PTO engagement: When the spur gear teeth become chipped or worn, operators often report a high-pitched whine or metallic grinding sound, especially when engaging auxiliary equipment. This is a common long-tail search query for “ZF transmission gear noise PTO”.
- Intermittent oil pressure drops at idle: A worn 4143.135.002 gear can cause the oil pump to slip, leading to fluctuating hydraulic pressure. Technicians searching for “ZF WG100 low oil pressure at idle” frequently trace this issue back to gear wear.
- Metal debris in transmission fluid: As the spur gear surface erodes, fine metallic particles contaminate the oil. This symptom is often flagged during routine filter inspections, matching searches like “metal shavings in ZF transmission fluid”.
- Hard shifting or delayed clutch engagement: Reduced hydraulic flow from a failing gear drive can cause sluggish gear changes, a symptom commonly searched as “ZF WG130 hard shifting when cold”.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4143.135.002 |
| Gear Type | Spur Gear Drive |
| Material | Case-Hardened Alloy Steel (20MnCr5 equivalent) |
| Outside Diameter | 98.5 mm |
| Hub Bore Diameter | 25.0 mm |
| Face Width | 28.0 mm |
| Number of Teeth | 24 |
| Module | 3.5 |
| Weight | 0.85 kg |
| OEM Reference | ZF 4143.135.002 |
| Surface Hardness | HRC 58-62 |
Compatibility
This spur gear drive is engineered for direct fitment in ZF WG100, WG130, and WG131 transmissions. It is also compatible with the ZF WG180 and WG200 series when used in auxiliary drive positions, though cross-referencing with the original assembly drawing is recommended. The 4143.135.002 gear is a common replacement in HL 100 Series and HL 270 Series transfer cases where oil pump drive functionality is required. For ZF WG120 and WG150 models, verify the shaft spline count before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the spur gear and supports bearing alignment |
| 4143301025 | HOUSING | Secondary housing for the intermediate shaft cluster |
| 0634313603 | O-RING | Seals the gear housing joint to prevent oil leaks |
| 4475280018 | SCREW PLUG | Closes the oil gallery port near the gear assembly |
| 0501342341 | SUPPORT RING | Provides axial support for the gear hub |
| 4143298457 | SEAL KIT | Contains all gaskets and seals for gear housing reinstallation |
| 0634313591 | O-RING | Seals the oil pump interface to the gear drive |
| 0636101068 | CAP SCREW | Secures the gear housing to the transmission case |
| 4143221013 | THROTTLE VALVE | Regulates hydraulic flow from the gear-driven pump |
| 0634304484 | O-RING | Seals the throttle valve connection to the gear housing |
ZF 4143.135.002 SPUR GEAR DRIVE – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4143.135.002 SPUR GEAR DRIVE with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4143.135.002 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 | 4143.135.002 |
|---|---|
| Normalized SKU | 4143135002 |
| Part name | SPUR GEAR DRIVE |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
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 4646.302.128 HELICAL GEAR
- ZF 4143.316.088 PINION
- ZF 4657.302.007 INPUT GEAR
- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
