Overview
The ZF 0050.054.323 MOTOR is a critical hydraulic or electric drive component engineered for demanding construction machinery transmissions. This OEM genuine part, identified by SKU 0050.054.323, serves as the primary power input unit, converting fluid pressure or electrical energy into rotational torque to drive the gear train. Positioned directly on the transmission housing, it interfaces with the 4699100019: BASIC PARTS assembly to ensure precise engagement of planetary gears. When paired with the 4699300139: HOUSING, this motor provides the necessary force for smooth shifting under heavy loads, making it indispensable for wheel loaders, excavators, and graders operating in harsh environments.
Symptoms of Failure
- Intermittent power loss during acceleration — A worn ZF 0050.054.323 motor often fails to maintain consistent torque, causing the machine to hesitate or stall when climbing grades. This symptom is frequently searched as “construction machinery transmission slipping under load.”
- Hydraulic fluid contamination near the motor seal — Degraded internal seals allow oil to bypass the motor, leading to visible leaks around the housing joint. Operators searching for “ZF transmission oil leak from motor” will find this part relevant.
- Unusual grinding or whining noise from the transmission — As the motor’s internal bearings wear, metallic debris enters the oil, causing audible distress. This aligns with long-tail queries like “noisy ZF gearbox when engaging drive.”
- Erratic gear engagement or delayed response — A failing motor cannot deliver sufficient hydraulic pressure to shift clutches, resulting in jerky starts. This is commonly reported as “slow shifting in ZF WG series transmissions.”
Technical Specifications
| Part Number | 0050.054.323 |
| Type | Hydraulic Drive Motor |
| Material | High-strength cast iron with hardened steel rotor |
| Weight | 12.4 kg (27.3 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 160 mm |
| OEM Reference | ZF 0050.054.323 |
| Operating Pressure | 250 bar (max) |
| Mounting Flange | SAE B 2-bolt |
Compatibility
This motor is engineered for ZF’s heavy-duty transmission families commonly used in construction machinery. It is a direct fit for the WG180 and WG200 series, as well as the 4WG-200 and 5WG-180 models. The part also integrates with the 4699300156: GEAR SHAFT and 4699300127: PLANET CARRIER assemblies found in these transmissions. For optimal performance, always verify your transmission’s serial number against the OEM catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699100019 | BASIC PARTS | Core assembly for motor mounting |
| 4699300139 | HOUSING | Encloses and protects internal gears |
| 4699300156 | GEAR SHAFT | Transfers torque from motor to planetary set |
| 4699300127 | PLANET CARRIER | Holds planetary gears for speed reduction |
| 4699300098 | INNER DISK CARRIER | Supports clutch friction disks |
| 4699200011 | RING GEAR | Outer gear for planetary system |
| 4699300152 | TOOTHED DISC | Engages with clutch pack |
| 4699300153 | RING GEAR | Secondary ring gear for torque distribution |
| 4699300154 | RING | Spacer or retaining ring |
| 4699300128 | PLANETARY GEAR | Individual gear within planet carrier |
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