Overview
The ZF 4699.372.128 STEERING GEAR is a critical component within the WG100, WG130, and WG131 transmission assemblies. This OEM genuine part functions as the primary control mechanism for directing hydraulic flow, ensuring precise gear engagement and smooth power transfer under heavy loads. Positioned within the valve body section of the transmission, the steering gear (SKU: 4699.372.128) directly influences shift timing and clutch pack actuation. When this component operates correctly, it provides consistent modulation of line pressure, which is essential for the durability of the entire drivetrain.
Symptoms of Failure
- Erratic or delayed gear engagement: A worn steering gear can cause hesitation when shifting between forward and reverse, often accompanied by a noticeable “clunk” as the transmission finally catches.
- Hydraulic oil seepage around the valve body: Deterioration of the steering gear’s sealing surfaces leads to external leaks, visible as drips or wet spots near the transmission housing.
- Inconsistent shift pressure under load: When the part fails internally, operators may experience surging or slipping during acceleration, particularly in WG131 models operating at maximum torque.
- Increased transmission operating temperature: A malfunctioning steering gear can cause hydraulic fluid to bypass internal circuits, generating excessive heat and reducing overall system efficiency.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.372.128 |
| Material | Hardened alloy steel with nitrided surface |
| Weight | 1.85 kg (4.08 lbs) |
| Length | 142 mm |
| Outer Diameter | 68 mm |
| OEM Reference | ZF 4699.372.128 |
| Seal Compatibility | Requires 0634303996: O-RING and 0501323165: SHAFT SEAL |
Compatibility
This steering gear is engineered specifically for ZF WG-series powershift transmissions. Verified compatibility includes the WG100, WG130, and WG131 models. It may also be suitable for the WG180 and WG200 series when used in conjunction with the correct 4699101086: HOUSING and 4699301223: HOUSING. Always confirm fitment by cross-referencing the existing part geometry with the 0730365801: TYPE PLATE on your transmission. For proper installation, ensure the 0636302022: SCREW PLUG and 0501319149: SCREW PLUG are torqued to factory specifications to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101086 | HOUSING | Encloses the steering gear assembly |
| 4699301223 | HOUSING | Secondary housing for valve body support |
| 0636302022 | SCREW PLUG | Seals hydraulic ports |
| 0501319149 | SCREW PLUG | Pressure test port plug |
| 0634801038 | SEALING RING | Prevents fluid leakage at joints |
| 0730365801 | TYPE PLATE | Identification and specification label |
| 0501323165 | SHAFT SEAL | Dynamic seal for rotating shaft |
| 4699301222 | COVER | Protects internal valve components |
| 0634303996 | O-RING | Static seal for housing interfaces |
| 0630513060 | SNAP RING | Retains steering gear in bore |
ZF 4699.372.128 STEERING GEAR – Gear RFQ Support
ZF 4699.372.128 STEERING GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 4699.372.128 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 PARTS
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 | 4699.372.128 |
|---|---|
| Normalized SKU | 4699372128 |
| 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
