Overview
The ZF 0750.147.186 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 200 Series transmission. This OEM genuine part channels pressurized hydraulic oil between the valve block and the transmission housing, ensuring consistent clutch engagement and torque converter lubrication. The SKU 0750.147.186 is precision-formed to withstand high thermal cycles and vibration fatigue, maintaining leak-free operation under heavy-duty industrial loads. When paired with the 4644105424 DISCONNECTION assembly, this hose pipe facilitates rapid pressure equalization during gear shifts, directly influencing shift quality and component longevity.
Symptoms of Failure
- Hydraulic fluid seepage at transmission bell housing – A worn 0750.147.186 hose pipe often develops micro-cracks, causing ATF to weep onto the 4644101224 TRANSMISSION HOUSING, leading to low fluid levels and eventual gear slippage.
- Erratic shift timing under load – Internal delamination of the hose restricts oil flow, delaying clutch pack fill times and producing harsh or delayed engagement in WG200 units.
- Visible hose swelling or blistering – Exposure to degraded transmission fluid causes the rubber reinforcement to balloon, often detected during routine inspection near the 4644303538 OUTPUT FLANGE area.
- Persistent low-pressure warning codes – A compromised hose pipe cannot maintain the 8–12 bar line pressure required for proper torque converter lockup, triggering diagnostic trouble codes in electronic control systems.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0750.147.186 |
| Material | Reinforced synthetic rubber with braided polyester |
| 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 0750.147.186 |
| Max Working Pressure | 20 bar (290 psi) |
| Temperature Range | -40°C to +135°C |
Compatibility
This hose pipe is primarily designed for the ZF WG 200 Series, including WG200, WG210, and WG220 variants used in construction and agricultural machinery. It also retrofits into earlier WG180 transmissions when the 0636021036 HEXAGON SCREW mounting pattern matches the revised housing. The 0750.147.186 replaces superseded part numbers 0750.147.180 and 0750.147.183, offering improved heat resistance. Always verify compatibility with your specific transmission serial number, as the hose routing differs between standard and reinforced TRANSMISSION HOUSING configurations.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105424 | DISCONNECTION | Quick-disconnect coupling for hydraulic line service |
| 4644303538 | OUTPUT FLANGE | Connects transmission output shaft to driveline |
| 0636021036 | HEXAGON SCREW | Fastener for securing hose brackets to housing |
| 4644101224 | TRANSMISSION HOUSING | Main structural casing for gear and valve assemblies |
| 4644301346 | TRANSMISSION HOUSING | Alternate housing variant for WG200 series |
| 0730365067 | TYPE PLATE | Identification plate with transmission serial number |
| 4644106300 | SHIFT SYSTEM | Electro-hydraulic shift actuator assembly |
| 4644306500 | COVER PLATE | Seals the valve block access port |
| 4644159311 | SHIFT SYSTEM | Secondary shift control module for range gears |
| 4644306563 | VALVE BLOCK | Hydraulic control manifold directing oil flow |
