Overview
The ZF 4699.170.141 MOTOR is a critical hydraulic actuation component within the final drive assembly of heavy-duty construction machinery. This OEM genuine part converts hydraulic pressure into precise rotational force, engaging the parking brake or clutch pack in ZF transmissions. Positioned directly on the transmission housing, the motor interfaces with the 4699101070 HOUSING to ensure sealed, high-torque operation. The SKU 4699.170.141 is engineered for demanding environments where consistent brake release is essential for loader and dozer mobility.
Symptoms of Failure
- Slow or incomplete brake release – When the motor loses internal seal integrity, the transmission may drag or fail to disengage, causing jerky starts.
- Hydraulic oil leakage at motor housing – Worn O-rings or piston wear allow fluid to escape past the 4699301146 HOUSING, leaving puddles under the machine.
- Intermittent transmission slipping – Reduced motor pressure prevents full clutch pack engagement, leading to power loss under load.
- Unusual whining or grinding noise – Internal bearing failure within the motor produces metallic sounds during operation, often accompanied by vibration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.170.141 |
| Type | Hydraulic Motor (Brake Release) |
| Material | High-tensile steel housing with nitrile seals |
| Weight | 3.2 kg (7.1 lbs) |
| Operating Pressure | 25–35 bar (362–507 psi) |
| OEM Reference | ZF 4699.170.141 |
| Mounting Bolts | 4x M10 (use 0636101411 CAP SCREW) |
Compatibility
This motor is designed for ZF WG series powershift transmissions commonly found in wheel loaders, graders, and forklifts. It directly fits the WG180, WG200, and WG310 models. The unit also integrates with the 4699309085 HOUSING COVER to seal the actuator cavity. For proper installation, ensure the mating surfaces are clean and free of debris.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101070 | HOUSING | Encloses motor and distributes hydraulic flow |
| 4699301146 | HOUSING | Secondary housing for clutch pack support |
| 4699309085 | HOUSING COVER | Seals the motor cavity and retains bearings |
| 0636101411 | CAP SCREW | Fastens motor to transmission housing |
| 0631302212 | CYLINDRICAL PIN | Aligns motor during assembly |
| 0634801038 | SEALING RING | Prevents fluid leaks at motor ports |
| 0501319149 | SCREW PLUG | Closes unused hydraulic ports |
| 0637885613 | BREATHER | Equalizes pressure inside housing |
| 0730365801 | TYPE PLATE | Identifies transmission model and specs |
| 4699025038 | GP25 | Gear pump for hydraulic supply |
