Overview
The ZF 4699.170.203 MOTOR is a critical hydraulic drive component engineered for precise power delivery within ZF construction machinery transmissions. This OEM genuine part converts hydraulic pressure into rotational force, directly engaging the transmission’s gear train to facilitate smooth machine movement. Positioned within the valve body assembly, the motor interfaces with the 4699101079: HOUSING to ensure sealed, high-torque output. The SKU 4699.170.203 is specifically designed to withstand the high cyclic loads common in excavators and wheel loaders, making it a vital element for operational reliability.
Symptoms of Failure
- Intermittent transmission slipping under load – When the motor wears, you may notice the machine hesitates or loses power during digging or lifting, a classic sign of internal leakage.
- Hydraulic oil contamination or overheating – A failing motor often generates metal debris, which can clog filters and cause the system to run hot, reducing overall efficiency.
- Unusual whining or grinding noises from the transmission – Worn bearings or scored internal components produce distinct sounds, especially during directional shifts.
- Delayed or jerky engagement – If the motor cannot maintain consistent pressure, the transmission may engage abruptly or with a noticeable lag, impacting operator control.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4699.170.203 |
| Type | Hydraulic Drive Motor |
| Material | Hardened Steel / Aluminum Alloy |
| Weight (approx.) | 4.2 kg (9.3 lbs) |
| Dimensions (L x W x H) | 180 mm x 120 mm x 95 mm |
| OEM Reference | ZF 4699.170.203 |
| Seal Type | Integrated O-Ring groove |
Compatibility
This motor is a direct-fit replacement for several ZF transmission models commonly used in construction machinery, including the WG180, WG200, and WG210 series. It also applies to the 4WG-180 and 4WG-200 variants found in compact loaders and telehandlers. For proper installation, ensure the 0501329881: HOUSING COVER is correctly aligned, and always replace the 0634306309: O-RING to prevent fluid bypass. Additionally, verify the 0637885612: BREATHER is clean to allow proper pressure equalization during operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101079 | HOUSING | Encloses and supports the motor assembly |
| 0501329881 | HOUSING COVER | Seals the housing and retains internal components |
| 0634306309 | O-RING | Provides hydraulic seal between mating surfaces |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0501319149 | SCREW PLUG | Seals threaded ports in the housing |
| 0636302022 | SCREW PLUG | Alternative plug for different port sizes |
| 0634801038 | SEALING RING | Prevents leaks at plug interfaces |
| 0730365801 | TYPE PLATE | Identification label for transmission model |
| 4699001070 | GK10 | Gear kit for torque distribution |
| 4699102158 | INPUT | Input shaft assembly for power transfer |
