Overview
The ZF 4699.172.080 STEERING PARTS component is a precision-engineered OEM genuine part designed for the hydraulic steering control assembly within ZF construction machinery transmissions. This critical steering element governs directional fluid flow, enabling precise operator control during heavy-duty loading, grading, and earthmoving operations. As an integral part of the steering valve stack, the 4699.172.080 interfaces directly with the main housing and bearing cover assemblies to maintain consistent hydraulic pressure. When paired with a compatible 4699101046: HOUSING and 4699301109: HOUSING, this steering part ensures leak-free operation and responsive steering under extreme loads.
Symptoms of Failure
- Steering drift or unresponsive turning: Worn internal seals in the 4699.172.080 cause hydraulic fluid to bypass, leading to delayed or erratic steering response during low-speed maneuvers.
- External oil seepage at steering column: Degraded O-rings or cracked housing interfaces produce visible fluid leaks around the steering valve area, often accompanied by a burnt hydraulic fluid smell.
- Increased steering effort or jerky motion: Internal spool binding from contamination or wear results in uneven hydraulic flow, requiring excessive force to turn the wheel or producing sudden lurching movements.
- Transmission warning lights or erratic shifting: Hydraulic pressure fluctuations from a failing steering part can trigger false pressure sensor readings, causing the transmission to enter limp mode or shift harshly.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4699.172.080 |
| Material | High-strength cast iron with nitrile sealing elements |
| Overall Dimensions (L x W x H) | 145 mm x 85 mm x 65 mm |
| Weight | 1.8 kg (4.0 lbs) |
| Operating Pressure Range | 180–250 bar (2,610–3,625 psi) |
| Temperature Range | -20°C to +120°C (-4°F to +248°F) |
| OEM Reference | ZF 4699.172.080 (Genuine) |
| Thread Size | M22 x 1.5 (inlet/outlet ports) |
Compatibility
This steering part is engineered for ZF WG series transmissions commonly used in construction machinery. It is directly compatible with the following ZF transmission models: WG180, WG200, WG210, and WG240. The 4699.172.080 also fits select variants of the ZF WG150 and WG310 series when used with the appropriate 4699301017: BEARING COVER and 4699301085: COVER. Always verify your transmission serial number against OEM documentation before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101046 | HOUSING | Encloses steering valve assembly; provides mounting points |
| 4699301109 | HOUSING | Secondary housing for hydraulic flow distribution |
| 4699301017 | BEARING COVER | Seals and supports steering shaft bearings |
| 4699301085 | COVER | Protects internal valve components from debris |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303141 | O-RING | Creates hydraulic seal between mating surfaces |
| 0734307407 | PROTECTION CAP | Covers exposed ports during transport |
| 0634309600 | SHAFT SEAL | Prevents fluid leakage along rotating steering shaft |
| 0637885612 | BREATHER | Equalizes internal pressure; vents moisture |
| 0636102023 | CAP SCREW | Secures steering valve to transmission housing |
