Overview
The ZF 0750.147.004 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 180 transmission series. This OEM genuine part channels pressurized hydraulic oil between the valve body and the cooler circuit, ensuring consistent lubrication and thermal regulation within the gearbox. The SKU 0750.147.004 is precision-molded to withstand high-temperature transmission fluid and mechanical vibration, preventing line degradation that can compromise shift quality. It integrates directly with the 4644101080: TRANSMISSION HOUSING and the 4644301333: HOUSING assembly, forming a sealed conduit that maintains system pressure.
Symptoms of Failure
- Hydraulic fluid seepage at hose connections: A cracked or swollen 0750.147.004 hose pipe often produces visible oil drips near the transmission pan or cooler lines, leading to low fluid levels and erratic shifting.
- Delayed or harsh gear engagement: When this hose pipe loses internal integrity, pressure drops cause sluggish clutch pack application, particularly during cold starts or under load.
- Overheating transmission fluid: A restricted or collapsed hose pipe restricts coolant flow, triggering temperature warnings and potential thermal damage to internal seals.
- Audible whining from the pump: Air ingestion through a compromised hose pipe creates cavitation noise, often accompanied by foamy fluid on the dipstick.
Technical Specifications
| Part Number | 0750.147.004 |
| Type | Hydraulic Hose Pipe |
| Material | Reinforced synthetic rubber with braided textile |
| Inner Diameter | 12.7 mm (0.5 in) |
| Outer Diameter | 19.0 mm (0.75 in) |
| Length | 410 mm (16.1 in) |
| Weight | 0.18 kg (0.4 lbs) |
| OEM Reference | ZF 0750.147.004 |
| Operating Pressure | 12 bar (174 psi) max |
| Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF hose pipe is primarily designed for the WG 180 series transmissions found in heavy-duty trucks and construction equipment. It also fits select variants of the WG 200 and WG 160 series where the cooler line routing matches the 410 mm length. Always verify the part number against your transmission’s 0730365125: TYPE PLATE for exact fitment. The hose pipe attaches using a 0631311009: GROOVED STUD at the pump end, ensuring a vibration-resistant seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101080 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4644301333 | HOUSING | Secondary housing for valve body and clutch pack |
| 0730365125 | TYPE PLATE | Identification plate with transmission serial and model |
| 0631311009 | GROOVED STUD | Threaded fastener for hose pipe attachment |
| 0636305019 | SCREW PLUG | Seals unused ports in the housing |
| 4644301247 | THREADED BUSH | Reinforced insert for threaded connections |
| 0634303485 | O-RING | Static seal for hose pipe end fittings |
| 4644106055 | SHIFT SYSTEM | Hydraulic control unit for gear selection |
| 4642306050 | COVER PLATE | Protective cover for shift system access |
| 4644306464 | GASKET | Sealing layer between housing and cover plate |
