Overview
The ZF 4699.173.004 STEERING GEAR is a critical internal component engineered for the WG100, WG130, and WG131 series transmissions. This genuine OEM part functions as the primary torque-transfer interface within the gear train, converting rotational input from the drive shaft into precise mechanical output for the vehicle’s steering system. Positioned directly within the main shaft assembly, the 4699.173.004 ensures smooth engagement and load distribution under high-stress conditions. For optimal assembly integrity, this steering gear is frequently installed alongside the 4699101043 HOUSING and the 4699301106 HOUSING, which provide the necessary structural support and alignment.
Symptoms of Failure
When the ZF 4699.173.004 steering gear begins to wear, operators will notice distinct performance degradation. Common failure indicators include:
- Erratic steering response or gear slipping – The transmission may hesitate or fail to maintain consistent torque during turns, often accompanied by a grinding noise.
- Visible oil leaks around the steering gear housing – Worn seals or gear surface degradation allow hydraulic fluid to escape, leaving puddles under the vehicle.
- Increased play or free movement in the steering wheel – Excessive backlash develops as the gear teeth wear, causing a delayed or loose steering feel.
- Metallic debris in the transmission fluid – Flakes or particles found during routine fluid changes indicate advanced gear wear and imminent failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4699.173.004 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 82 mm |
| Inner Bore Diameter | 32 mm |
| Overall Length | 145 mm |
| Tooth Profile | Involute spline, 24 teeth |
| OEM Reference | ZF 4699.173.004 (Genuine) |
Compatibility
This steering gear is specifically designed for the ZF WG100, WG130, and WG131 transmission families. It is also compatible with the closely related WG180 and WG200 series when used in steering gear applications. The part integrates directly with the 4699301015 HOUSING COVER and the 4699301085 COVER to form a sealed, high-pressure assembly. Always verify your transmission model and serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101043 | HOUSING | Main structural enclosure for gear assembly |
| 4699301106 | HOUSING | Secondary housing for bearing support |
| 4699301015 | HOUSING COVER | Seals and protects internal gear components |
| 4699301085 | COVER | External access cover for maintenance |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303980 | O-RING | Hydraulic seal between mating surfaces |
| 0734307407 | PROTECTION CAP | Covers exposed shaft ends during transport |
| 0634309600 | SHAFT SEAL | Prevents fluid leakage along rotating shafts |
| 0630502032 | RETAINING RING | Secures bearings and gears in axial position |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
ZF 4699.173.004 STEERING GEAR – Gear RFQ Support
Use ZF 4699.173.004 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 4699.173.004 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 | 4699.173.004 |
|---|---|
| Normalized SKU | 4699173004 |
| 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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