Mercedes-Benz ML320. Manual — part 158

Fig. 49: Upshift/Downshift Solenoid Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Operation - If a shift solenoid valve (Y3/6y3, Y3/6y4, Y3/6y5) is actuated via the ETC control module
(N15/3), it opens and directs the control pressure (p-SV) to the command valve assigned (31). See Fig. 49.

The respective shift solenoid valve (Y3/6y3, Y3/6y4, Y3/6y5) remains actuated and therefore open until the
shift process is completed. The shift pressure (p-SV) to the command valve is reduced to zero as soon as the
respective shift solenoid valve (Y3/6y3, Y3/6y4, Y3/6y5) is switched de-energized.

Automatic Transmission, Location Of Components, Floor Shift (With Touch Shift)

Fig. 50: Automatic Transmission, Location Of Components, Floor Shift
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location/Task/Design/Function Of Oil Pump

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

Fig. 51: Location/Task/Design/Function Of Oil Pump
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Oil Pump, Location

The oil pump (crescent-type pump) (6) is installed in the torque converter housing behind the torque
converter and is driven by the drive flange of the torque converter. See Fig. 51.

Oil Pump, Task

To produce the necessary oil pressure for the hydraulic sequences.

Oil Pump, Design

An external gear (6a) which is mounted eccentrically in the pump housing is located on the internal gear
(6b) which is connected to the drive flange (6b). The crescent (6c) drives the external gear (6a).

Oil Pump, Function

When the engine is running oil is delivered through the suction gallery (6e) along the top and bottom side
of the crescent (6c) to the pressure chamber (6d) of the housing. The meshing of the teeth prevents oil

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

from flowing from the pressure side to the suction side.

Park Pawl, Location/Task/Design/Function

Fig. 52: Park Pawl, Location/Task/Design/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Park Pawl, Location

The park pawl gear (4) and park pawl mechanism (4a) are located in the rear part of the transmission
housing. See Fig. 52.

Park Pawl, Task

Secures the vehicle mechanically to prevent it from rolling in addition to the parking brake.

Park Pawl, Design

See PARK PAWL, DESIGN.

Park Pawl, Function

See PARK PAWL, FUNCTION.

Park Pawl, Design

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me

Fig. 53: Park Pawl, Design
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Park Pawl, Function

2001 Mercedes-Benz ML320

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

me