Overview
The ZF 4644.323.003 PLANET SHAFT is a critical internal component engineered specifically for the WG 200 Series transmission. This genuine OEM part functions as the central rotating axis within the planetary gear set, transmitting torque from the sun gear to the planet carrier while supporting the planet gears. Located in the main gearbox housing, the planet shaft ensures precise gear meshing and load distribution during all operating conditions. The SKU 4644.323.003 is manufactured to ZF’s exacting tolerances, guaranteeing seamless integration with the planetary assembly and long-term durability under heavy-duty industrial applications.
Symptoms of Failure
- Transmission gear slipping under load: A worn planet shaft can cause uneven gear engagement, leading to intermittent slipping or loss of power transfer during acceleration or hill climbing.
- Metallic grinding or whining noises from the transmission: Excessive clearance or surface wear on the shaft produces audible grinding sounds, particularly in lower gears or during deceleration.
- Oil contamination with metallic debris: As the planet shaft degrades, microscopic metal particles enter the transmission fluid, visible as glitter or sludge during oil changes.
- Vibration through the driveline: A damaged shaft creates imbalance in the planetary set, causing noticeable vibration at specific RPM ranges that worsens over time.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.323.003 |
| OEM Reference | ZF WG200 Series |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 185 mm (estimated) |
| Outer Diameter | 32 mm (estimated) |
| Weight | 1.2 kg (estimated) |
| Surface Hardness | 58-62 HRC |
| Thread Type | M12 x 1.5 (internal) |
Compatibility
This planet shaft is primarily designed for the ZF WG200 transmission series, including models such as WG180, WG200, and WG210. It is also compatible with select ZF Ecomat 4HP and 5HP variants that share the same planetary gear architecture. Always verify your transmission’s serial number against the OEM parts catalog before installation. The shaft integrates directly with the 4460165051 CONSOLE and 4460368311 CONSOLE to secure the planetary assembly. During replacement, it is recommended to install new 0636011429 HEXAGON SCREW and 0730100365 WASHER to ensure proper torque retention and prevent fastener fatigue.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4460165051 | CONSOLE | Housing support for planetary gear set |
| 4460368311 | CONSOLE | Secondary housing bracket for shaft alignment |
| 0636011429 | HEXAGON SCREW | Fastener for planet shaft retention |
| 0730100365 | WASHER | Load distribution under screw head |
| 4644105418 | DISCONNECTION | Clutch disengagement mechanism |
| 4644305041 | ADAPTER | Interface between shaft and carrier |
| 4460068159 | AXLE DRIVE | Power output shaft connection |
| 4460168651 | INPUT FLANGE | Torque input coupling |
| 4460368318 | FLANGE | Output shaft mounting flange |
| 4460368317 | DUST PROTECTION | Seal cover for shaft entry point |
ZF 4644.323.003 PLANET SHAFT – Shaft RFQ Support
PartsZF supports RFQ preparation for ZF 4644.323.003 PLANET SHAFT where shaft identification and documentation review are required before ordering.
Part-Number Summary
Use ZF number 4644.323.003 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: CRAWLER
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 | 4644.323.003 |
|---|---|
| Normalized SKU | 4644323003 |
| Part name | PLANET SHAFT |
| Product category | shaft |
| 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.
Related Parts
- ZF 2094.110.011 P.T.O. SHAFT
- ZF 2094.110.014 P.T.O. SHAFT
- ZF 4642.303.002 OUTPUT SHAFT
- ZF 2093.110.011 P.T.O. SHAFT
- ZF 5838.300.106 INPUT SHAFT
