Overview
The ZF 4108.016.052 P 4300 is a genuine OEM component engineered for the high-stress environment of construction machinery transmissions. This part functions as a critical pressure-regulating valve within the hydraulic control unit of ZF powershift gearboxes. It precisely modulates oil flow to ensure smooth clutch engagement and consistent torque delivery under heavy loads. The SKU 4108.016.052 identifies this as a factory-spec replacement, guaranteeing exact fitment and durability. When installed, it works in direct conjunction with the 4108101165 HOUSING, which encloses the valve assembly and channels hydraulic fluid to the clutch packs.
Symptoms of Failure
- Erratic gear engagement under load: If the valve spool sticks or wears, you may experience delayed or harsh shifting when operating excavators or loaders, especially during directional changes.
- Hydraulic oil seepage around the valve body: A worn sealing surface can cause external leaks, often visible as drips near the transmission housing joint. This is frequently accompanied by a degraded 0501325471 SEALING RING.
- Intermittent loss of drive in specific gears: A failing valve may fail to maintain adequate pressure, causing the transmission to slip or drop out of gear entirely during operation on inclines.
- Contaminated hydraulic fluid: Internal wear particles from the valve can circulate through the system, accelerating damage to other components like the 0636302015 SCREW PLUG sealing points.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4108.016.052 |
| OEM Reference | ZF P 4300 Series |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Length | 95 mm |
| Valve Diameter | 28 mm |
| Operating Pressure | 18–22 bar |
| Seal Type | Integrated O-ring groove (compatible with 0634304358 O-RING) |
Compatibility
This genuine ZF valve is primarily designed for the WG180 and WG200 series powershift transmissions commonly found in wheel loaders, dozers, and material handlers. It also fits select WG150 and WG250 variants used in older construction machinery models. For proper identification, always verify the 0730365280 TYPE PLATE on your transmission housing, which lists the exact series and build configuration. The valve assembly interfaces directly with the 4108301436 INPUT SHAFT hydraulic circuit and is secured by 0630532160 RETAINING RING and 0630531130 RETAINING RING components.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101165 | HOUSING | Encloses valve assembly and directs hydraulic flow |
| 0636302015 | SCREW PLUG | Seals hydraulic ports in the valve body |
| 0501325471 | SEALING RING | Prevents fluid bypass at valve interfaces |
| 0730365280 | TYPE PLATE | Identifies transmission model and serial number |
| 4108301436 | INPUT SHAFT | Transfers engine torque to the gear train |
| 0735330931 | BALL BEARING | Supports rotating shafts within the transmission |
| 0630532160 | RETAINING RING | Secures bearings and shafts axially |
| 0630531130 | RETAINING RING | Locks internal components in position |
| 4475280018 | SCREW PLUG | Provides access port for pressure testing |
| 0634304358 | O-RING | Creates a leak-proof seal between mating surfaces |
