Overview
The ZF 4699.170.266 MOTOR is a critical hydraulic motor assembly designed for integration within ZF powershift transmissions used in heavy construction machinery. This OEM genuine part converts hydraulic pressure into mechanical torque to drive the transmission’s internal pump and clutch systems. Positioned directly on the transmission housing, the motor interfaces with the driveline to ensure precise power delivery. The SKU 4699.170.266 is a direct replacement unit, engineered to match factory tolerances for reliable operation in excavators, wheel loaders, and crawler dozers. When installed alongside the 4699001195 GK10LD gear kit, this motor ensures consistent oil flow and pressure regulation within the transmission sump.
Symptoms of Failure
When the ZF 4699.170.266 MOTOR begins to wear, operators may notice distinct performance issues. Look for these common failure indicators:
- Erratic gear engagement or slipping – A failing motor cannot maintain steady hydraulic pressure, causing the transmission to hesitate or slip under load, especially during directional shifts.
- Hydraulic oil leaks around the motor housing – Worn seals or internal cracks allow transmission fluid to escape, often visible as drips near the motor mounting flange.
- Unusual whining or grinding noises – Internal bearing wear or contamination in the motor produces high-pitched sounds during operation, worsening as the part degrades.
- Reduced machine travel speed or power – The motor fails to deliver adequate torque, leading to sluggish acceleration and diminished performance on inclines.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.170.266 |
| Type | Hydraulic Drive Motor |
| Material | High-grade cast iron with hardened steel internals |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Dimensions (L x W x H) | 220 mm x 140 mm x 120 mm |
| OEM Reference | ZF 4699.170.266 |
| Operating Pressure | Up to 250 bar |
| Seal Type | NBR (Nitrile Butadiene Rubber) |
Compatibility
This motor is engineered for use in several ZF transmission families commonly found in construction machinery. It is a direct fit for the WG180, WG200, and WG250 series, as well as the 4WG-200 and 5WG-250 variants. The part also integrates with the 4699101108 HOUSING assembly, which encloses the motor and directs oil flow. For complete driveline restoration, pair this motor with the 4699102172 INPUT shaft and the 4699103058 OUTPUT flange to ensure seamless power transfer through the gear train.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699001195 | GK10LD | Gear kit for motor drive engagement |
| 4699101108 | HOUSING | Encloses motor and directs hydraulic flow |
| 4699102172 | INPUT | Input shaft for torque transmission |
| 4699103058 | OUTPUT | Output flange for driveline connection |
| 4699105125 | TURNTABLE BEARING | Supports rotating assembly loads |
| 0501329881 | HOUSING COVER | Seals the motor housing cavity |
| 0630513065 | SNAP RING | Retains motor components in place |
| 0634306309 | O-RING | Prevents fluid leaks at joints |
| 0637885612 | BREATHER | Equalizes pressure inside the housing |
| 0769100082 | TYPE PLATE | Identification label for part specs |
