Overview
The ZF 4699.172.042 STEERING PARTS component is a precision-engineered OEM genuine part designed for the hydraulic steering control assembly within heavy-duty ZF transmissions. This part functions as a critical interface between the steering column and the transmission’s internal valve body, directing hydraulic flow to enable precise articulation in construction machinery. As a genuine ZF part, the SKU 4699.172.042 ensures exact fitment and long-term reliability, reducing downtime in demanding off-road applications. It is typically mounted within the transmission housing, working in concert with the 4699101046: HOUSING and the 4699301109: HOUSING to maintain structural integrity under high-pressure steering loads.
Symptoms of Failure
When the ZF 4699.172.042 steering part deteriorates, operators may notice specific performance issues. Common failure symptoms include:
- Erratic steering response: Delayed or jerky steering movements, especially during low-speed maneuvers, indicating internal wear in the steering valve assembly.
- Hydraulic fluid seepage: Visible oil leaks around the steering control area, often caused by degraded seals or cracks in the part’s body.
- Increased steering effort: The operator must apply excessive force to turn the wheels, suggesting reduced hydraulic pressure due to internal bypass.
- Unusual whining noise: A high-pitched sound from the transmission during steering operations, pointing to cavitation or component misalignment.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4699.172.042 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | Approx. 1.8 kg (3.97 lbs) |
| Dimensions (L x W x H) | 120 mm x 85 mm x 65 mm |
| OEM Reference | ZF 4699.172.042 (Genuine) |
| Operating Pressure | Up to 250 bar |
| Temperature Range | -20°C to +120°C |
Compatibility
This steering part is engineered for use in ZF’s heavy-duty transmission series commonly deployed in construction machinery. It is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG250. These transmissions are found in wheel loaders, graders, and dump trucks. For proper installation, ensure the 4699301017: BEARING COVER and 4699301085: COVER are correctly aligned to prevent contamination. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101046 | HOUSING | Encloses steering valve assembly |
| 4699301109 | HOUSING | Secondary housing for hydraulic channels |
| 4699301017 | BEARING COVER | Protects steering shaft bearings |
| 4699301085 | COVER | Seals the steering control cavity |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during assembly |
| 0634303141 | O-RING | Provides hydraulic seal |
| 0734307407 | PROTECTION CAP | Covers exposed ports |
| 0634309600 | SHAFT SEAL | Prevents fluid leakage along shaft |
| 0637885612 | BREATHER | Equalizes internal pressure |
| 0636102023 | CAP SCREW | Secures mounting points |
