Overview
The ZF 4143.342.068 PUMP SHAFT is a critical rotating component engineered for the hydraulic pump drive within ZF WG100, WG130, and WG131 transmission assemblies. This OEM genuine shaft transmits torque from the transmission’s PTO (power take-off) gear train directly to the hydraulic pump, ensuring consistent oil flow for clutch actuation and lubrication. The SKU 4143.342.068 is precision-machined to maintain concentricity under high-load cycles, directly interfacing with the 4143101009 HOUSING and the 4143301025 HOUSING to form a sealed, pressurized oil circuit. Without this shaft, the transmission cannot generate hydraulic pressure, making it a non-negotiable element for operational readiness.
Symptoms of Failure
- Intermittent gear slipping under load: A worn pump shaft spline or bearing journal causes hydraulic pressure fluctuations, leading to clutch pack slippage during acceleration or hill climbing.
- Low hydraulic pressure warning codes: When the shaft’s drive key or spline strips, the pump cannot achieve rated flow, triggering diagnostic trouble codes (DTCs) for insufficient main pressure.
- Visible oil seepage from pump housing interface: Excessive radial play from a worn shaft damages the 0634313603 O-RING seal, resulting in oil leaks around the pump mounting flange.
- Unusual whining or knocking noise from transmission sump: A bent or cracked pump shaft produces metallic contact noise as it rotates against the housing bore, often mistaken for bearing failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4143.342.068 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 187.5 mm |
| Shaft Diameter (bearing journal) | 28.0 mm |
| Spline Type | DIN 5480 (16-tooth involute) |
| Weight | 0.85 kg |
| OEM Reference | ZF 4143.342.068 |
| Surface Finish | Ground & polished (Ra ≤ 0.4 µm) |
Compatibility
This pump shaft is specifically designed for ZF’s HL 100 Series and HL 270 Series modular transmissions. Verified direct-fit applications include the WG100, WG130, and WG131 models. It also serves as a service replacement for earlier WG180 and WG200 variants when used with the correct 4475280018 SCREW PLUG to seal the auxiliary port. Always confirm housing bore dimensions against the 4143101009 HOUSING before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Main pump housing casting |
| 4143301025 | HOUSING | Intermediate housing for shaft support |
| 0634313603 | O-RING | Shaft-to-housing static seal |
| 4475280018 | SCREW PLUG | Hydraulic port sealing plug |
| 0501342341 | SUPPORT RING | Backup ring for O-ring groove |
| 4143298457 | SEAL KIT | Complete shaft seal overhaul set |
| 0634313591 | O-RING | Housing-to-pump flange seal |
| 0636101068 | CAP SCREW | Housing mounting bolt |
| 4143221013 | THROTTLE VALVE | Hydraulic flow control valve |
| 0634304484 | O-RING | Throttle valve seal |
ZF 4143.342.068 PUMP SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4143.342.068 PUMP SHAFT with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This shaft 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 4143.342.068 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: GEAR SHIFT SENSOR
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 | 4143.342.068 |
|---|---|
| Normalized SKU | 4143342068 |
| Part name | PUMP SHAFT |
| Product category | shaft |
| Cross-reference support | Available for RFQ review |
| Weight | 0.12 |
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.
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- ZF 4646.304.065 QUILL SHAFT
- ZF 4657.354.010 INPUT SHAFT
