Overview
The ZF 4699.170.063 MOTOR is an OEM genuine hydraulic motor integral to the power take-off (PTO) drive assembly within ZF construction machinery transmissions. This component converts hydraulic pressure into mechanical rotational force, enabling auxiliary functions such as pump drives for dump bodies, winches, or concrete mixers. The SKU 4699.170.063 sits directly within the transmission housing, interfacing with the main gear train to deliver precise torque output. When paired with the 4699101046 HOUSING and 4699301109 HOUSING, this motor ensures sealed, high-pressure operation essential for demanding off-highway applications.
Symptoms of Failure
- Intermittent PTO engagement failure: The motor fails to engage or disengage smoothly, causing erratic auxiliary equipment operation—a common sign of internal seal degradation.
- Hydraulic oil leaks near the motor housing: Visible fluid seepage around the mounting flange or shaft seal area, often traced to worn O-rings or a cracked 4699301017 BEARING COVER.
- Reduced torque output under load: The motor struggles to maintain speed when driving heavy pumps, indicating internal wear or contamination in the hydraulic circuit.
- Unusual whining or grinding noises: Metallic sounds during operation suggest bearing failure or debris ingress, often requiring replacement of the 4699301085 COVER assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.170.063 |
| Type | Hydraulic Motor (PTO Drive) |
| Rated Pressure | 250 bar (3,625 psi) |
| Displacement | 28 cm³/rev (1.71 in³/rev) |
| Weight | 4.2 kg (9.3 lbs) |
| Material | Hardened Steel / Aluminum Alloy Housing |
| OEM Reference | ZF 4699.170.063 |
| Seal Type | Viton O-Ring / PTFE Backup Ring |
Compatibility
This motor is designed for ZF transmissions commonly used in construction machinery, including the WG180, WG200, and WG210 series. It also fits select Ecomat 4HP and 6HP off-highway variants where a PTO hydraulic motor is specified. Always verify the mounting flange pattern and spline count against your transmission model before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101046 | HOUSING | Encloses motor assembly, provides mounting interface |
| 4699301109 | HOUSING | Secondary housing for bearing support |
| 4699301017 | BEARING COVER | Seals bearing cavity, prevents contamination |
| 4699301085 | COVER | Protects motor shaft end from debris |
| 4699301014 | THREAD PROTECTIVE SHIELD | Guards threaded ports during transport |
| 0634303141 | O-RING | Hydraulic seal between motor and housing |
| 0734307407 | PROTECTION CAP | Covers unused hydraulic ports |
| 0634309600 | SHAFT SEAL | Prevents oil leakage along rotating shaft |
| 0637885612 | BREATHER | Equalizes internal pressure, vents moisture |
| 0636102023 | CAP SCREW | Secures motor to transmission housing |
