Overview
The ZF 4699.170.162 MOTOR is a critical hydraulic actuation component within ZF powershift transmissions used in heavy construction machinery. This OEM genuine part converts hydraulic pressure into mechanical force to engage clutch packs and control gear selection. Positioned on the transmission valve body or housing, the motor directly interfaces with the shift control system. The SKU 4699.170.162 identifies this as a factory-spec replacement unit, ensuring precise flow rates and pressure response for reliable machine operation.
Symptoms of Failure
- Delayed or erratic gear engagement: When the motor wears internally, hydraulic pressure drops, causing sluggish shifting or hesitation when moving from neutral to forward/reverse.
- Transmission overheating under load: A failing motor can cause clutch slippage, generating excess heat that triggers warning lights or reduces machine performance.
- Oil contamination from internal debris: Worn seals or piston damage within the motor can introduce metallic particles into the hydraulic circuit, accelerating wear on adjacent components.
- Intermittent loss of drive: If the motor fails to maintain consistent pressure, the transmission may momentarily lose power, especially during low-speed maneuvering on job sites.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.170.162 |
| Type | Hydraulic Shift Motor |
| Material | High-strength aluminum alloy with hardened steel internals |
| Weight | 2.8 kg (6.2 lbs) |
| Operating Pressure | 12–25 bar (175–360 psi) |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| OEM Reference | ZF 4699.170.162 |
Compatibility
This motor is engineered for ZF WG series transmissions commonly installed in wheel loaders, excavators, and telehandlers. It is directly compatible with the WG180 and WG200 models, as well as select variants of the WG150 and WG250 series. Always verify your transmission serial number before ordering to ensure correct fitment.
Installation Context
During replacement of the 4699.170.162, technicians frequently inspect or replace the 4699025040: GP25 gear pump, which supplies hydraulic flow to the motor. The 4699101114: HOUSING encloses the motor assembly and must be checked for cracks or warping. The 4699102157: INPUT shaft and 4699103114: OUTPUT shaft are directly linked to the motor’s actuation path; worn splines or bearings here will compromise motor performance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699025040 | GP25 | Hydraulic gear pump supplying pressure to the motor |
| 4699101114 | HOUSING | Enclosure for motor and valve assembly |
| 4699102157 | INPUT | Input shaft transmitting torque from motor |
| 4699103114 | OUTPUT | Output shaft delivering motion to clutch packs |
| 4699109068 | BRAKE PARTS | Brake components for holding and stopping functions |
| 4699301202 | HOUSING | Secondary housing for shift mechanism |
| 4699309205 | HOUSING COVER | Sealing cover for housing access port |
| 0636101477 | CAP SCREW | Fastener for securing motor to housing |
| 0631302221 | CYLINDRICAL PIN | Alignment pin for precise motor positioning |
| 0501319149 | SCREW PLUG | Plug for hydraulic test ports on motor body |
