Overview
The ZF 4699.173.009 STEERING GEAR is a critical component within the WG100, WG130, and WG131 transmission assemblies, responsible for directing hydraulic fluid flow to actuate clutch packs and control gear shifts. This OEM genuine part, identified by SKU 4699.173.009, sits within the valve body section of the transmission, where it interfaces directly with the main control housing to modulate pressure and timing. Precision-machined from high-strength steel, this steering gear ensures consistent engagement and disengagement of planetary gearsets, making it indispensable for maintaining smooth power delivery in heavy-duty industrial applications. When paired with a properly sealed 4699101044: HOUSING and a robust 4699301111: HOUSING, this part forms the core of the transmission’s hydraulic logic system.
Symptoms of Failure
- Erratic or delayed gear engagement: When the steering gear wears, hydraulic pressure drops, causing hesitation or harsh shifts between forward and reverse gears.
- Transmission fluid leaks around the valve body: A worn steering gear can compromise sealing surfaces, leading to visible oil seepage near the 4699301054: HOUSING COVER or 4699301055: COVER.
- Intermittent slipping under load: As internal clearances increase, the gear fails to maintain steady pressure, resulting in momentary loss of torque transfer during heavy operation.
- Unusual whining or grinding noises: Metal-to-metal contact from a degraded steering gear produces audible sounds, especially during low-speed maneuvers or cold starts.
Technical Specifications
| Part Number | 4699.173.009 |
| Material | Case-hardened alloy steel |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 95 mm |
| Outer Diameter | 48 mm |
| Internal Bore | 18 mm |
| OEM Reference | ZF 4699.173.009 |
| Surface Finish | Ground and polished |
Compatibility
This steering gear is engineered specifically for ZF WG-series transmissions, including the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct valve body configuration. For optimal performance, always verify fitment with your transmission’s serial number and consult the OEM parts catalog. The gear integrates directly with the 4699101044: HOUSING and 4699301111: HOUSING to ensure precise alignment within the hydraulic circuit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101044 | HOUSING | Encloses the steering gear and directs fluid flow |
| 4699301111 | HOUSING | Secondary housing for valve body support |
| 4699301054 | HOUSING COVER | Seals the housing assembly against contaminants |
| 4699301055 | COVER | Protects internal components from debris |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303996 | O-RING | Provides hydraulic seal between mating surfaces |
| 0734307408 | PROTECTION CAP | Covers exposed ports during storage |
| 0634309600 | SHAFT SEAL | Prevents fluid leakage along the rotating shaft |
| 0630502032 | RETAINING RING | Secures the steering gear in position |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
ZF 4699.173.009 STEERING GEAR – Gear RFQ Support
Use ZF 4699.173.009 STEERING GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4699.173.009 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: STEERING GEAR
- Illustration reference available for RFQ review
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4699.173.009 |
|---|---|
| Normalized SKU | 4699173009 |
| Part name | STEERING GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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- ZF 4143.142.022 GEAR SHIFT SENSOR
