1997 MERCEDES-BENZ ML320 Complete Repair Manual

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Page 1193 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual
2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:25 PMPage 24 © 2006 Mitchell Repair Information Company, L

Page 1194 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 16: Shift From 1 To 2, Function (1st Gear Engaged)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.6

Page 1195 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual 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
m

Page 1196 of 4133

Page 1197 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual 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).
Operatio

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The B1 pressure acting on the end face of the 1-2/4-5 shift pressure shift valve (29a) is superseded by the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
Saturday, October 02, 2010 3:15:25 PMPage 28 © 2006 Mitchell Repair Information Company, LLC.

Page 1198 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual
See SHIFT PRESSURE, FUNCTION
.
Modulating Pressure, Function

See MODULATING PRESSURE, FUNCTION
.
Shift Valve Pressure, Function

See SHIFT VALVE PRESSURE, FUNCTION
.
Lubricating Pressure, Fu

Page 1199 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Automatic Transmission, Gear Ratios

See AUTOMATIC TRANSMISSION, GEAR RATIOS
.
Power Transmission, Function

See AUTOMATIC TRANSMISSION, POWER TRANSMISSION, FUNCTION
.
Power Flow In 1st Gear, Fu

Page 1200 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Limp-Home Mode, Function

See LIMP
-HOME MODE, FUNCTION.
Operating Pressure, Function

See OPERATING PRESSURE, FUNCTION
.
Lubricating Pressure, Function

See LUBRICATING PRESSURE, FUNCTION
.

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