Overview
The ZF 4699.172.027 STEERING PARTS component is a precision-engineered OEM genuine part designed for the steering control assembly within ZF construction machinery transmissions. This critical part facilitates the directional control of heavy equipment by managing hydraulic flow within the steering circuit. The SKU 4699.172.027 sits directly within the valve body assembly, interfacing with the main control housing to ensure responsive and reliable steering operations under extreme loads. As an OEM genuine part, it guarantees exact fitment and durability matching the original factory specifications.
Symptoms of Failure
- Erratic steering response or delayed engagement: When the ZF 4699.172.027 wears, operators often notice a lag between steering input and machine movement, especially during low-speed maneuvering.
- Hydraulic fluid contamination or metallic debris in oil: Internal wear of this steering part can shed particles into the transmission fluid, leading to accelerated damage across the entire hydraulic system.
- Unusual whining or grinding noises during turns: A failing 4699.172.027 may produce audible sounds as internal components struggle to maintain proper hydraulic pressure.
- Intermittent loss of steering assist under load: This symptom typically worsens as the part degrades, causing dangerous operational gaps during heavy lifting or excavation.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4699.172.027 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions | 85 mm x 45 mm x 35 mm |
| OEM Reference | ZF 4699.172.027 |
| Sealing Surface | Ground finish, Ra 0.4 μm |
| Operating Pressure | Up to 250 bar |
Compatibility
This steering part is engineered for ZF WG series transmissions commonly found in construction machinery. It is directly compatible with the WG180, WG200, and WG210 transmission models. Additionally, it fits select variants of the WG150 and WG160 series used in wheel loaders and graders. Always verify your transmission model before installation.
During replacement, the 4699101018: HOUSING and 4699301051: HOUSING must be inspected for wear as they directly enclose this steering component. The 4699301054: HOUSING COVER and 4699301055: COVER provide critical sealing and alignment for the assembly. For complete overhaul, also consider the 0634303996: O-RING and 0634319161: SHAFT SEAL to prevent fluid leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101018 | HOUSING | Main enclosure for steering valve assembly |
| 4699301051 | HOUSING | Secondary housing for hydraulic passages |
| 4699301054 | HOUSING COVER | Seals and protects internal steering components |
| 4699301055 | COVER | Top cover for steering control section |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303996 | O-RING | Hydraulic seal between mating surfaces |
| 0734307408 | PROTECTION CAP | Covers exposed ports during transport |
| 0634319161 | SHAFT SEAL | Prevents oil leakage along rotating shafts |
| 0630502032 | RETAINING RING | Secures internal components in position |
| 0637885612 | BREATHER | Equalizes pressure and vents moisture |
