Overview
The ZF 4699.172.104 STEERING PARTS unit is a critical OEM genuine component engineered for precise hydraulic control within ZF construction machinery transmissions. This part functions as a steering control valve or actuator, regulating oil flow to the steering clutch packs to enable smooth directional changes under heavy load. The SKU 4699.172.104 is a direct replacement for factory-installed units, ensuring exact fitment and OEM-specified performance. It sits within the transmission’s hydraulic control circuit, often interfacing with the 4699101097: HOUSING and the 4699102166: INPUT shaft assembly to modulate steering response.
Symptoms of Failure
- Erratic steering response or delayed engagement – When the 4699.172.104 wears internally, operators may notice a lag between steering input and machine movement, especially during low-speed maneuvering.
- Hydraulic oil leaks around the steering housing – Degraded seals or bore wear in this part can cause visible fluid seepage near the 4699103060: OUTPUT connection, leading to pressure loss and contamination.
- Intermittent steering clutch slip under load – A failing steering part may fail to maintain adequate hydraulic pressure, causing the steering clutches to slip when turning with a loaded bucket or crane attachment.
- Unusual noise during steering operation – Cavitation or metal-on-metal contact from internal spool wear can produce whining or grinding sounds, indicating imminent failure of the 4699003082: GK20 gear kit that often operates in tandem with this part.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4699.172.104 |
| Product Type | Steering Control Valve / Steering Parts |
| Material | High-tensile cast iron with hardened steel spool |
| Weight (approx.) | 4.2 kg (9.3 lbs) |
| Dimensions (L x W x H) | 210 mm x 120 mm x 95 mm |
| OEM Reference | ZF 4699.172.104 (Genuine) |
| Operating Pressure | 20–35 bar (290–508 psi) |
| Seal Type | NBR O-ring compatible (see 0634303141: O-RING) |
Compatibility
This steering part is designed for ZF heavy-duty powershift transmissions commonly used in wheel loaders, excavators, and telehandlers. Based on its hydraulic control architecture, the 4699.172.104 is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG310. It also fits select variants of the 4WG-200 and 5WG-210 series. Always verify your transmission serial number against the OEM parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699003082 | GK20 | Gear kit for steering pump drive |
| 4699101097 | HOUSING | Steering valve housing assembly |
| 4699102166 | INPUT | Input shaft for steering control |
| 4699103060 | OUTPUT | Output flange for steering clutch |
| 4699105010 | TURNTABLE BEARING | Rotary support for steering unit |
| 4699301183 | HOUSING | Secondary housing for steering gear |
| 4699301017 | BEARING COVER | Protective cover for steering bearing |
| 4699301085 | COVER | End cover for steering valve body |
| 4699301014 | THREAD PROTECTIVE SHIELD | Thread guard for steering ports |
| 0634303141 | O-RING | Seal for steering hydraulic connections |
