Overview
The ZF 0050.054.318 MOTOR is a critical hydraulic actuation component within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part converts hydraulic pressure into precise mechanical rotation, engaging clutch packs to manage power flow through the gear train. Positioned directly on the transmission valve body, the 0050.054.318 motor controls shift timing and torque distribution. The SKU 0050.054.318 is engineered to ZF’s exacting tolerances, ensuring seamless integration with the 4699100019: BASIC PARTS kit and the 4699300139: HOUSING assembly. Without this motor, the transmission cannot modulate hydraulic circuits, leading to complete driveline failure.
Symptoms of Failure
- Erratic gear engagement or delayed shifting — When the 0050.054.318 motor loses internal seal integrity, hydraulic pressure drops, causing harsh or missed shifts. This is a common long-tail search query for “ZF transmission shift delay causes.”
- Oil leaks around the valve body area — Worn O-rings or a cracked motor housing allow transmission fluid to escape. Search for “ZF 0050.054.318 oil leak repair” to find this part.
- Intermittent loss of drive in forward or reverse — A failing motor may not fully stroke the clutch piston, resulting in partial engagement. This symptom often appears as “ZF WG200 slipping under load.”
- Unusual whining or grinding from the transmission — Internal bearing wear within the motor generates metallic noise, especially during cold starts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0050.054.318 |
| Type | Hydraulic Shift Motor |
| Material | Hardened Steel / Aluminum Alloy |
| Weight | 2.8 kg (6.2 lbs) |
| Operating Pressure | 18–25 bar |
| OEM Reference | ZF 0050.054.318 |
| Seal Type | PTFE / Viton |
Compatibility
This motor is specifically designed for ZF’s powershift transmission series used in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models. Additionally, it is compatible with select 4WG-200 and 6WG-250 variants. The 0050.054.318 motor interfaces directly with the 4699300156: GEAR SHAFT and the 4699300127: PLANET CARRIER to control clutch pack engagement. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699100019 | BASIC PARTS | Seal and gasket kit for motor assembly |
| 4699300139 | HOUSING | Motor housing casting |
| 4699300156 | GEAR SHAFT | Output shaft for motor drive |
| 4699300127 | PLANET CARRIER | Planetary gear carrier |
| 4699300098 | INNER DISK CARRIER | Clutch disk support |
| 4699200011 | RING GEAR | Final drive ring gear |
| 4699300152 | TOOTHED DISC | Clutch friction disc |
| 4699300153 | RING GEAR | Planetary ring gear |
| 4699300154 | RING | Snap ring / retaining ring |
| 4699300128 | PLANETARY GEAR | Planet gear for carrier |
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