Overview
The ZF 0750.147.187 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 65 Series transmission assembly. This OEM genuine part channels pressurized hydraulic oil between the valve body and the cooler circuit, ensuring consistent lubrication and thermal regulation during high-torque operations. Positioned within the lower valve block region, the hose pipe maintains system integrity by preventing pressure drops that can compromise shift quality. The SKU 0750.147.187 is manufactured to ZF’s exacting tolerances, using reinforced synthetic rubber with a braided textile layer to withstand continuous exposure to ATF temperatures up to 120°C. When replacing this hose, it is common practice to also inspect the 4616105413: OUTPUT for wear, as both components share the same hydraulic circuit.
Symptoms of Failure
- Transmission fluid puddles under the bell housing – A cracked or swollen 0750.147.187 hose pipe will weep ATF, often mistaken for a pan gasket leak. This is a primary indicator of rubber degradation in WG65 units.
- Erratic gear engagement during cold starts – When the hose pipe loses internal integrity, air ingression causes spongy shift feel and delayed clutch pack application, particularly in reverse gear.
- Overheating with visible steam from the cooler lines – Restricted flow through a collapsed hose pipe reduces oil circulation, triggering thermal alarms in ZF electronic controls. This symptom often appears alongside a failing 4616203017: OUTPUT FLANGE.
- Whining noise at idle – A partially blocked hose pipe creates cavitation in the pump, producing a high-pitched metallic sound that intensifies as the transmission warms up.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0750.147.187 |
| Material | Reinforced NBR (Nitrile Butadiene Rubber) with textile braid |
| Inner Diameter | 12.7 mm (0.5 in) |
| Outer Diameter | 19.0 mm (0.75 in) |
| Length | 385 mm (15.2 in) |
| Working Pressure | 15 bar (217 psi) max |
| Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 0750.147.187 |
| Weight | 0.18 kg (0.4 lbs) |
Compatibility
This hose pipe is factory-specified for the ZF WG 65 Series, including models WG65, WG80, and WG100. It also fits select WG120 and WG150 variants where the cooler line routing matches the 385 mm length. The 0750.147.187 is not compatible with WG180 or WG200 units due to different banjo fitting sizes. For those larger transmissions, verify the 4616101117: TRANSMISSION HOUSING configuration before ordering. Always replace the 0636011038: HEXAGON SCREW that secures the hose bracket, as thread deformation can cause false torque readings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers rotational force from the planetary gearset to the driveshaft |
| 4616203017 | OUTPUT FLANGE | Connects the output shaft to the universal joint yoke |
| 4616101117 | TRANSMISSION HOUSING | Encases the gear train and valve body assembly |
| 0636011038 | HEXAGON SCREW | M8 bolt securing the hose pipe bracket to the housing |
| 0636016015 | HEXAGON SCREW | M10 bolt for output flange retention |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing-to-converter mating |
| 0634313118 | O-RING | Seals the hose pipe connection to the cooler line |
| 0732611049 | FILTER INSERT | Internal mesh filter for the valve body suction port |
| 0634303718 | O-RING | Seals the output flange to the housing bore |
| 0636610082 | STUD | Threaded rod for mounting the transmission to the engine block |
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