Overview
This genuine ZF 4699.270.006 assembly part is a critical internal component engineered for heavy-duty construction machinery transmissions. It functions as a precision-machined interface element within the valve body or clutch pack assembly, regulating hydraulic fluid flow to ensure smooth gear engagement and torque transfer. The SKU 4699.270.006 is manufactured to OEM tolerances, directly replacing worn units to restore transmission efficiency. When installed alongside the 4699101080 HOUSING and 0501329881 HOUSING COVER, it forms a sealed assembly that prevents pressure loss and contamination ingress.
Symptoms of Failure
When the 4699.270.006 assembly part degrades, operators typically notice these specific failure modes:
- Erratic shifting or gear slippage – Worn internal bores cause inconsistent hydraulic pressure, leading to delayed or harsh clutch engagement during load cycles.
- External oil seepage at housing joints – Cracks or deformation in the part allow transmission fluid to escape, often visible as wet spots near the 0630513065 SNAP RING or 0634306309 O-RING sealing points.
- Audible whining or grinding noises – Metal fatigue or debris contamination within the assembly creates abnormal sounds during acceleration or deceleration.
- Reduced hydraulic pressure readings – Internal leakage past the part lowers system pressure, triggering warning codes on electronic controllers.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4699.270.006 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Outer Diameter | 68.5 mm ± 0.1 mm |
| Inner Diameter | 42.0 mm ± 0.05 mm |
| Height/Thickness | 22.3 mm |
| Weight | 0.34 kg (0.75 lbs) |
| Surface Finish | Ra 0.8 µm sealing surfaces |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF Friedrichshafen AG |
Compatibility
This genuine assembly part is designed for integration into ZF WG series powershift transmissions commonly found in wheel loaders, graders, and material handlers. It is compatible with the following transmission models:
- ZF WG180 (all variants)
- ZF WG200 (including WG200/6)
- ZF WG120 (limited applications)
- ZF 4WG-200
Always verify the part number against your transmission’s serial plate. For complete rebuilds, pair this component with the 4699101080 HOUSING and 0501329881 HOUSING COVER to ensure proper alignment and sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101080 | HOUSING | Encloses and supports internal transmission assembly |
| 0501329881 | HOUSING COVER | Seals the housing and retains lubrication |
| 0630513065 | SNAP RING | Secures components axially within the bore |
| 0634306309 | O-RING | Provides static seal between mating surfaces |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0501319149 | SCREW PLUG | Seals hydraulic ports during service |
| 0636302022 | SCREW PLUG | Alternative port sealing for different thread sizes |
| 0634801038 | SEALING RING | Prevents fluid bypass at threaded connections |
| 0730365801 | TYPE PLATE | Identification label for transmission model |
| 4699001080 | GK10 | Gasket kit containing seals for complete overhaul |
