Overview
The ZF 4699.170.146 MOTOR is a critical hydraulic drive component engineered for integration within ZF’s heavy-duty construction machinery transmissions. This OEM genuine part converts hydraulic pressure into precise rotational force, directly controlling the power take-off (PTO) or auxiliary drive systems. Positioned within the transmission’s valve body assembly, the motor regulates fluid flow to engage or disengage secondary equipment. The SKU 4699.170.146 is specifically designed to interface with the HOUSING and INPUT shaft assemblies, ensuring seamless torque transfer. Without this motor, the transmission cannot actuate auxiliary functions, making it essential for excavators, wheel loaders, and telescopic handlers.
Symptoms of Failure
- Intermittent or complete loss of PTO engagement: When the motor wears internally, the transmission fails to engage auxiliary pumps or winches, often accompanied by a “no response” condition from the hydraulic system.
- Hydraulic oil leaks around the motor housing: Worn seals or cracked casing cause visible oil seepage near the GK10LD coupling area, leading to low fluid levels and eventual transmission overheating.
- Erratic or delayed gear shifting under load: A failing motor disrupts the pilot pressure needed for clutch pack actuation, resulting in harsh shifts or slipping during heavy excavation work.
- Abnormal whining or grinding noise from the transmission: Internal bearing wear within the motor generates metallic sounds, particularly when the OUTPUT shaft is under strain.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.170.146 |
| Type | Hydraulic Drive Motor (Gear or Gerotor) |
| Material | High-tensile cast iron housing with hardened steel gears |
| Weight | 4.2 kg (9.3 lbs) |
| Dimensions (L x W x H) | 185 mm x 95 mm x 110 mm |
| Operating Pressure | 250 bar (3,625 psi) max |
| OEM Reference | ZF 4699.170.146 |
| Seal Type | Viton O-ring (compatible with O-RING 0634306309) |
Compatibility
This motor is engineered for ZF’s WG series powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 models. Additionally, it integrates with the WG120 and WG150 series when paired with the correct HOUSING adapter. Always verify the spline count and port configuration against your transmission’s TYPE PLATE before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699001185 | GK10LD | Coupling gear connecting motor to PTO shaft |
| 4699101108 | HOUSING | Encloses motor and directs hydraulic flow |
| 4699102172 | INPUT | Input shaft transferring torque from engine |
| 4699103057 | OUTPUT | Output shaft driving final drive or winch |
| 4699105096 | TURNTABLE BEARING | Supports rotating load in swing drives |
| 0501329881 | HOUSING COVER | Seals the motor compartment against debris |
| 0630513065 | SNAP RING | Retains motor bearings in position |
| 0634306309 | O-RING | Prevents hydraulic fluid leakage at joints |
| 0637885612 | BREATHER | Equalizes pressure inside the transmission housing |
| 0769100082 | TYPE PLATE | Identification plate for transmission model specs |
