Overview
The ZF 4699.170.158 MOTOR is a critical hydraulic drive component engineered for demanding construction machinery applications. Positioned within the transmission’s power take-off (PTO) assembly, this OEM genuine part converts hydraulic pressure into mechanical torque to drive auxiliary systems such as cooling fans, hydraulic pumps, or winch drives. The SKU 4699.170.158 is precision-machined to ZF’s exacting tolerances, ensuring seamless integration with the transmission’s internal oil flow circuits. This motor directly interfaces with the 4699101113 HOUSING and the 4699102157 INPUT shaft assembly, forming a sealed unit that withstands high cyclic loads and thermal stress in off-highway equipment.
Symptoms of Failure
When the ZF 4699.170.158 MOTOR begins to degrade, operators may notice specific performance issues. Hydraulic motor whining or cavitation noise often indicates internal wear or contamination, a common search query for “ZF transmission motor noise.” Intermittent loss of auxiliary power—where attached equipment fails to maintain speed under load—points to internal seal leakage or rotor scoring. External oil seepage around the motor housing is a clear sign of seal failure, frequently searched as “ZF motor oil leak repair.” Finally, erratic or delayed engagement of the PTO function suggests the motor’s internal splines or bearings are worn, requiring immediate inspection alongside the 4699025039 GP25 gear pump assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.170.158 |
| Type | Hydraulic Drive Motor |
| Material | High-Grade Alloy Steel / Cast Iron Housing |
| Weight | Approx. 8.5 kg (18.7 lbs) |
| Overall Length | 210 mm |
| Mounting Flange Diameter | 120 mm |
| Shaft Spline Count | 14-tooth SAE B |
| Max Operating Pressure | 250 bar (3,625 psi) |
| OEM Reference | ZF 4699.170.158 |
Compatibility
This genuine ZF motor is designed for integration into the WG180, WG200, and WG211 series powershift transmissions commonly found in wheel loaders, graders, and material handlers. It also fits select models of the ZF Ergopower and Ecolife transmissions used in construction machinery. For proper installation, the motor must be paired with the 4699103114 OUTPUT shaft and the correct housing gasket set. Always verify the transmission serial number against ZF’s compatibility charts to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699025039 | GP25 | Gear pump supplying hydraulic flow to the motor |
| 4699101113 | HOUSING | Encloses and supports the motor assembly |
| 4699102157 | INPUT | Input shaft transferring torque from transmission |
| 4699103114 | OUTPUT | Output shaft connecting to auxiliary equipment |
| 4699109068 | BRAKE PARTS | Brake components for motor output control |
| 4699301201 | HOUSING | Secondary housing for motor support |
| 4699309202 | HOUSING COVER | Sealing cover for motor housing |
| 0636101477 | CAP SCREW | Fastener for motor mounting |
| 0631302221 | CYLINDRICAL PIN | Alignment pin for precise assembly |
| 0501319149 | SCREW PLUG | Sealing plug for oil passages |
