Overview
The ZF 4699.170.062 MOTOR is a critical hydraulic drive component within ZF construction machinery transmissions, specifically responsible for converting hydraulic pressure into mechanical torque to engage clutch packs or shift gears. This OEM genuine part, identified by SKU 4699.170.062, mounts directly onto the transmission housing and interfaces with the valve body to control oil flow. When paired with the 4699101155 HOUSING and the 4699201018 HOUSING, it forms a sealed motor assembly that ensures precise actuation under high pressure. Without this motor, the transmission cannot modulate gear engagement, making it essential for loader, excavator, and grader drivelines.
Symptoms of Failure
- Intermittent gear slipping under load: A worn motor fails to maintain clutch pressure, causing the transmission to slip when digging or climbing. This is a common search query for “ZF transmission slipping under load.”
- Delayed or harsh shifting: If the motor’s internal seals degrade, hydraulic response time increases, leading to “ZF transmission delayed engagement” or “hard shifting in construction equipment.”
- External oil seepage at motor housing: Cracks or worn O-rings around the motor body produce visible leaks, often searched as “ZF motor oil leak near housing.”
- Erratic clutch modulation: The motor may cause the transmission to “hunt” between gears or fail to hold a steady ratio, a symptom tied to “ZF motor failure symptoms.”
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.170.062 |
| Type | Hydraulic Drive Motor |
| Material | High-tensile aluminum alloy with hardened steel rotor |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L x W x H) | 180 mm x 95 mm x 85 mm |
| Operating Pressure | 25 bar (max) |
| OEM Reference | ZF 4699.170.062 |
| Sealing Type | NBR O-ring (replace with 0634801038 SEALING RING) |
Compatibility
This motor is engineered for ZF WG series transmissions commonly found in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models, which are used in wheel loaders, backhoes, and telehandlers. The motor also integrates with the 4699309077 HOUSING COVER to seal the actuator cavity. For secure mounting, always use the 0636100132 TORX SCREW to prevent vibration loosening. Verify your transmission serial number against ZF parts catalogs to confirm fitment for older WG models.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101155 | HOUSING | Encloses motor rotor and stator assembly |
| 4699201018 | HOUSING | Secondary housing for hydraulic porting |
| 4699309077 | HOUSING COVER | Seals the motor cavity from debris |
| 0636100132 | TORX SCREW | Fastens motor to transmission case |
| 0631302072 | CYLINDRICAL PIN | Aligns motor housing during assembly |
| 0634801038 | SEALING RING | Prevents hydraulic fluid leakage |
| 0636302013 | SCREW PLUG | Closes unused hydraulic ports |
| 0501319149 | SCREW PLUG | Seals pressure test points |
| 0637101790 | BREATHER | Equalizes internal pressure |
| 0631302221 | CYLINDRICAL PIN | Guides motor alignment during installation |
