Mercedes-Benz ML320. Service manual - part 141

 

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Mercedes-Benz ML320. Service manual - part 141

 

 

Fig. 17: Shift From 1 To 2, Function (Shift Phase)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Fig. 18: Shift From 1 To 2, Function (Second Gear Engaged)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
 

Aim 

Engage front multiple-disc clutch (K1), disengage front multiple-disc brake (B1). 

Operation 

1st Gear Engaged See Fig. 16

The end face of the 1-2/4-5 command valve (31a) is kept depressurized via the 1-2 and 4-5 shift solenoid valve 
(Y3/6y3). Via the 1-2/4-5 holding pressure shift valve (28a), working pressure (p-A) is applied to the front 
mutiple-disc clutch (K1) is depressurized. 

Shift Phase 

See Fig. 17 

Via the 1-2 and 4-5 shift solenoid valve (Y3/6y3), the shift valve pressure (p-SV) is directed onto the end face 
of the command valve 1-2/4-5 (31a). The 1-2/4-5 command valve (31a) is displaced and the shift pressure (p-S) 
coming from the 1-2/4-5 shift pressure shift valve (29a) via the 1-2/4-5 command valve (31a) is directed to the 
front multiple-disc clutch (K1). At the same time the front multiple-disc brake (B1) is subjected to overlap 
pressure from the 1-2/4-5 overlap regulating valve (30a). 

The B1 pressure acting on the end face of the 1-2/4-5 shift pressure shift valve (29a) is superseded by the 
working pressure (p-A). The increasing shift pressure (p-S) at the front multiple-disc clutch (K1) acts on the 
annular area of the 1-2/4-5 overlap regulating valve (30a). With an appropriate pressure level at the 1-2/4-5 
holding pressure shift valve (28a) this valve switches over. 

2nd Gear Engaged 

See Fig. 18

After the gear change is complete, the pressure on the end face of the 12-/4-5 command valve (31a) is reduced 
via the 1-2 and 4-5 shift solenoid valve (Y3/6y3) and the command value is pushed back into its original 
position. Via the 1-2/4-5 holding pressure shift valve (28a) working pressure (p-A) now reaches the front 
multiple-disc clutch (K1) via the 1-2/4-5 command valve (31a). 

The front multiple-disc brake (B1) is disengaged (depressurized). The spring in the 1-2/4-5 shift pressure shift 
valve (29a) pushes this into its original position. 

Continuation 

Operating Pressure, Function 
 
See OPERATING PRESSURE, FUNCTION

Shift Pressure, Function 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 
See SHIFT PRESSURE, FUNCTION

Modulating Pressure, Function 
 
See MODULATING PRESSURE, FUNCTION

Shift Valve Pressure, Function 
 
See SHIFT VALVE PRESSURE, FUNCTION

Lubricating Pressure, Function 
 
See LUBRICATING PRESSURE, FUNCTION

Regulating Valve Pressure, Function 
 
See REGULATING VALVE PRESSURE, FUNCTION.  

AUTOMATIC TRANSMISSION, CONTENTS, FUNCTION DESCRIPTION 

Automatic Transmission, Function 
 
See AUTOMATIC TRANSMISSION, FUNCTION

Automatic Transmission, Location Of Mechanical Parts 
 
See AUTOMATIC TRANSMISSION, LOCATION OF MECHANICAL PARTS

Automatic Transmission, Location Of Electric/Electronic Components 
 
See AUTOMATIC TRANSMISSION, LOCATION OF ELECTRIC/ELECTRONIC 
COMPONENTS

Automatic Transmission, Location Of Hydraulic Components 
 
See AUTOMATIC TRANSMISSION, POSITION OF HYDRAULIC COMPONENTS 

Automatic Transmission, Location Of Components, Floor Shift 
 
See AUTOMATIC TRANSMISSION, LOCATION OF COMPONENTS, FLOOR SHIFT

Automatic Transmission, Selector Lever Positions 
 
See AUTOMATIC TRANSMISSION, SELECTOR LEVER POSITIONS

NOTE:

Transmission with touch shift.

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 

 

 

 

 

 

 

Content   ..  139  140  141  142   ..