Overview
The ZF 4699.172.109 STEERING PARTS component is a critical OEM genuine part engineered for the hydraulic steering circuit within ZF construction machinery transmissions. This part regulates oil flow to the steering clutch pack, ensuring precise directional control during heavy-duty operations. As a genuine ZF component, the 4699.172.109 is manufactured to exact tolerances to maintain the integrity of the steering system. It interfaces directly with the 4699101108: HOUSING and the 4699102172: INPUT shaft assembly, forming a sealed unit that prevents contamination and pressure loss. This part is commonly replaced during a full steering overhaul to restore factory performance.
Symptoms of Failure
- Erratic steering response or delayed engagement: When the 4699.172.109 wears, internal spools stick, causing a lag between lever input and wheel movement. This is often misdiagnosed as a pump issue.
- Hydraulic oil leaks around the steering housing: Deteriorated seals within this part allow pressurized oil to escape, leaving visible puddles under the transmission. Search query: “ZF steering parts oil leak fix.”
- Intermittent loss of steering under load: Worn internal components bypass oil, making the machine drift or fail to turn when pushing heavy material. Search query: “construction machinery steering slipping under load.”
- Increased operating noise from the steering valve: Cavitation or metal-to-metal contact produces a whining or grinding sound, indicating imminent failure of the 4699001237: GK10LD gear set.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.172.109 |
| Type | Steering Control Valve / Spool Assembly |
| Material | Hardened Steel with Nitrile Seals |
| Weight | 2.4 kg (5.3 lbs) |
| Dimensions (L x W x H) | 180 mm x 95 mm x 75 mm |
| OEM Reference | ZF 4699.172.109 |
| Operating Pressure | 25-35 bar (360-510 psi) |
| Seal Kit Compatibility | 0634306309: O-RING |
Compatibility
This steering part is designed for ZF WG series powershift transmissions commonly found in wheel loaders, telehandlers, and graders. It is a direct fit for the WG180 and WG200 series, as well as the WG120 and WG150 models when used with the correct 4699103057: OUTPUT shaft configuration. Always verify the housing casting number before installation. The part also integrates with the 4699105108: TURNTABLE BEARING in articulated steering applications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699001237 | GK10LD | Gear set for steering pump drive |
| 4699101108 | HOUSING | Steering valve housing casting |
| 4699102172 | INPUT | Input shaft for steering clutch |
| 4699103057 | OUTPUT | Output shaft for steering assembly |
| 4699105108 | TURNTABLE BEARING | Rotary bearing for steering articulation |
| 0501329881 | HOUSING COVER | Seals the steering valve housing |
| 0630513065 | SNAP RING | Retains internal spool components |
| 0634306309 | O-RING | Hydraulic seal for pressure ports |
| 0637885612 | BREATHER | Vents pressure from steering circuit |
| 0769100082 | TYPE PLATE | Identification plate for steering unit |
