gf2550w1002tk

Turbine wheel component description

Type gf · topic 25.50 · version 0100 · 2010-03-23

Applies to: MODEL 930, 932, 933, 934 with CODE (GK8) Turbo clutch

Where it sits

Function group 2 Chassis › 25 Clutch › 25.50 Fluid coupling — Series 930 · Series 932 · Series 933 · Series 934

GF25.50-W-1002TK

Turbine wheel component description

17.3.10

MODEL 930, 932, 933, 934 with CODE (GK8) Turbo clutch

Turbine wheel component description

W25.50-1011-76

Location

1 Impeller

2 Turbine wheel

3 Turbine wheel brake

4 Brake roller freewheel

5 Transmission input shaft

Task

When driving off, the rotating impeller (1) deflects the oil flow onto the blades of the turbine wheel (2) thereby incorporating it into its rotary motion. The turbine wheel (2) is connected by way of a brake roller freewheel (4) with the transmission input shaft (5) thereby forwarding the engine torque to the transmission.

In retarder mode, the turbine wheel (2) is blocked by the turbine wheel brake (3) actuated up against the turbo clutch housing. The rotating impeller (1) deflects the oil flow onto the blades of the fixed turbine wheel (2), which now acts as a stator, and which then brakes the oil flow and therefore the impeller (1).