Overview
The ZF 4656.374.012 SHAFT is a critical rotating component within the WG160 series transmission, responsible for transferring torque from the input to the planetary gear sets. This OEM genuine part, identified by SKU 4656.374.012, serves as the primary power delivery axis, ensuring smooth engagement and consistent load distribution across the gear train. Precision-machined to ZF’s exacting tolerances, this shaft interfaces directly with the 4656101032: TRANSMISSION HOUSING and the 4656201075: HOUS.FRONT SECT to maintain concentric alignment during high-torque operations.
Symptoms of Failure
- Vibration under load — A worn 4656.374.012 shaft often produces low-frequency vibrations during acceleration, indicating bearing surface degradation or spline wear.
- Erratic gear engagement — When the shaft loses its dimensional integrity, you may experience delayed or harsh shifting, particularly in the WG160’s forward gears.
- Metallic debris in oil pan — Flaking or spalling on the shaft’s hardened surface generates fine metallic particles, detectable during routine oil changes.
- Axial play at the output flange — Excessive end float signals that the shaft’s thrust faces have worn beyond specification, risking damage to the 4656201034: HOUSING REAR PART.
Technical Specifications
| Parameter | Value |
|---|---|
| Overall Length | 412 mm |
| Shaft Diameter (bearing journals) | 45 mm |
| Spline Count | 24 (involute) |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 3.8 kg |
| OEM Reference | ZF 4656.374.012 |
| Surface Hardness | 58–62 HRC |
Compatibility
This shaft is engineered for the ZF WG160 series but also fits select variants in the WG180 and WG200 families where the input shaft geometry matches. It is not backward-compatible with older WG150 units. Always verify the spline profile against your existing 4472239177: HOUSING REAR PART to confirm fitment. The 4656.374.012 is commonly used in WG160-6 and WG160-8 configurations.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Encloses the gear train and supports the shaft assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing that aligns the input shaft |
| 4656201034 | HOUSING REAR PART | Rear housing section supporting output bearings |
| 4472239177 | HOUSING REAR PART | Alternate rear housing for WG160 variants |
| 0631306816 | CYLINDRICAL PIN | Locates the shaft within the housing bore |
| 0636100817 | CAP SCREW | Secures the shaft retaining plate |
| 4656301016 | SCREEN SHEET | Filters debris from oil flow near the shaft |
| 4656301017 | SCREEN SHEET | Secondary oil screen for the shaft lubrication circuit |
| 0636100803 | CAP SCREW | Fastener for the shaft bearing retainer |
| 4681301040 | OIL FEED.HOUSG. | Directs pressurized oil to the shaft journals |
Frequently Asked Questions
Q: Can the 4656.374.012 shaft be reused after a transmission rebuild?
No. ZF recommends replacing this shaft during any major overhaul due to the risk of undetectable micro-cracks in the hardened case. Always install a new OEM unit.
Q: How do I confirm this shaft fits my WG160 transmission?
Measure the spline diameter and overall length of your existing shaft. The 4656.374.012 has a 45 mm bearing journal and 24 splines. Cross-reference with your transmission’s serial number against ZF’s compatibility chart.
Q: What torque should I use for the retaining cap screw (0636100817)?
Apply 85 N·m to the 0636100817: CAP SCREW after applying medium-strength thread locker. Over-torquing can distort the shaft’s bearing surface.
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Phone: +86 158 2286 3467 |
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ZF 4656.374.012 SHAFT – Shaft RFQ Support
PartsZF helps B2B buyers source ZF 4656.374.012 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 4656.374.012 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4656054027
- Documentation reference: 4656054031
- Documentation reference: 4656054042
- Documentation reference available for RFQ review
- Illustration section: COUPLING
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 | 4656.374.012 |
|---|---|
| Normalized SKU | 4656374012 |
| Part name | SHAFT |
| Product category | shaft |
| 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
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- ZF 4646.323.010 OUTPUT SHAFT
- ZF 4646.304.069 OUTPUT SHAFT
- ZF 4646.304.065 QUILL SHAFT
- ZF 4657.354.010 INPUT SHAFT
