Overview
The ZF 0501.212.308 HOSE PIPE is a critical fluid transfer component engineered specifically for the WG 310 Series transmission. 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 0501.212.308 is precision-formed to withstand high operating temperatures and constant vibration, preventing fluid starvation that can lead to premature clutch wear. When installed correctly with a secure CAP SCREW and a properly sealed COVER SHEET, this hose pipe maintains the hydraulic integrity required for smooth shifting under heavy loads.
Symptoms of Failure
- Hydraulic fluid puddling beneath the transmission bell housing – A cracked or swollen 0501.212.308 hose pipe often causes slow, persistent oil leaks that worsen during operation, leading to low fluid levels and erratic gear engagement.
- Delayed or harsh shifting under load – When this hose pipe loses internal pressure due to micro-fractures, the transmission may hesitate before engaging gears or produce a noticeable jolt during upshifts.
- Overheating accompanied by burnt fluid odor – A restricted or collapsed hose pipe restricts oil flow to the cooler, causing the transmission to run hot and degrade the fluid’s lubricating properties.
- Whining or groaning noise from the pump area – Air ingestion through a damaged hose pipe creates cavitation, producing a high-pitched whine that intensifies with engine RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.212.308 |
| OEM Reference | ZF 0501.212.308 |
| Material | Reinforced synthetic rubber with braided textile |
| Inner Diameter | 12 mm |
| Outer Diameter | 18 mm |
| Overall Length | 410 mm |
| Weight | 0.18 kg |
| Max Operating Pressure | 18 bar |
| Temperature Range | -40°C to +120°C |
Compatibility
This hose pipe is primarily designed for the ZF WG 310 Series, but it also fits several related heavy-duty transmissions. Compatible models include the WG180, WG200, WG250, and WG310. The part is frequently used in municipal buses, construction loaders, and off-highway trucks. Always verify the routing path against your existing assembly, as the hose pipe must align with the TRANSMISSION HOUSING ports and be secured using the correct HEXAGON SCREW torque specifications to avoid leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101107 | TRANSMISSION HOUSING | Encloses and supports all internal gear sets and shafts |
| 0636015304 | HEXAGON SCREW | Secures housing covers and valve body assemblies |
| 0636101828 | CAP SCREW | Fastens cooler line brackets and pipe clamps |
| 4646301102 | COVER SHEET | Protects internal components from debris ingress |
| 4646301285 | COVER SHEET | Alternate cover for different housing configurations |
| 0631311009 | GROOVED STUD | Provides alignment and retention for cover plates |
| 0636101193 | CAP SCREW | Used for mounting oil pan and filter assemblies |
| 0636010179 | HEXAGON SCREW | Fastens bell housing to engine adapter plate |
| 0636010172 | HEXAGON SCREW | Secures torque converter housing bolts |
| 0636101153 | CAP SCREW | Attaches cooler line fittings to the transmission case |
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