MERCEDES-BENZ ML430 1997 Complete Repair Manual

Shift Valve Pressure Regulating Valve, Function
Operation - The variable regulating valve pressure (p-RV) is controlled to a constant shift valve pressure (p-
SV) at the shift valve pressure regulating valve (21) and is used to supply the solenoid valves for 1-2 and 4-5
shift, 3-4 shift, 2-3 shift (Y3/6y3, Y3/6y4, Y3/6y5) as well as the PWM solenoid valve for the converter lockup
(Y3/6y6). See Fig. 74
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:27 PMPage 133 © 2006 Mitchell Repair Information Company, LLC.

Fig. 74: Shift Valve Pressure Regulating Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Lubrication Pressure Regulating Valve, Location/Task/Function
Fig. 75: Lubrication Pressure Regulating Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Lubrication Pressure Regulating Valve, Location

In the valve housing of the shift plate (2a). See Fig. 75
.
Lubrication Pressure Regulating Valve, Task


2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Lubricates and cools the mechanical part of the transmission, and limits the pressure in the torque
converter.
Lubrication Pressure Regulating Valve, Function

See LUBRICATION PRESSURE REGULATING VALVE, FUNCTION
.
Lubrication Pressure Regulating Valve, Function
Operation - At the working pressure regulating valve (22) surplus oil is diverted to the lubrication pressure
regulating valve (23), from were the lubrication pressure (p-Sm) is used in regulating amounts to supply the
transmission lubrication system including the torque converter. See Fig. 76
.
Fig. 76: Lubrication Pressure Regulating Valve, Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:27 PMPage 135 © 2006 Mitchell Repair Information Company, LLC.

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Overlap Regulating Valve, Location/Task/Function
Fig. 77: Overlap Regulating Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Overlap Regulating Valve, Location

Each shift group is assigned one overlap regulating va lve. The 1-2/4-5 overlap regulating valve (30a) is
installed in the valve housing of the shift plate (2b) , the 2-3 overlap regulating valve (30b) and 4-5 (30c)
are installed in the valve housin g of the shift plate (2a). See Fig. 77
.
Overlap Regulating Valve, Location

The overlap regulating valve regulates th e pressure reduction during a shift phase.
Overlap Regulating Valve, Function

See OVERLAP REGULATING VALVE, FUNCTION
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Overlap Regulating Valve, Function
Operation - During the shift phase the pressure in the disengaging shift actuator is controlled depending on the
engine load (modulating pressure (p-Mod)) and the pressure in the engaging shift actuator. The regulated
pressure is inversely proportional to the transfer capacity of the activating shift actuator (regulated overlap). See
Fig. 78
.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Saturday, October 02, 2010 3:15:27 PMPage 137 © 2006 Mitchell Repair Information Company, LLC.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Fig. 78: Overlap Regulating Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function
Fig. 79: Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Torque Converter Lockup Clutch Regulating Valve, Location

In the valve housing of the shift plate. See Fig. 79
.
Torque Converter Lockup Clutch Regulating Valve, Task

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Hydraulic control of the torque converter lockup clutch and distribution of the lubricating oil.
Torque Converter Lockup Clutch Regulating Valve, Function

See TORQUE CONVERTER LOCKUP CLUTCH REGULATING VALVE, FUNCTION
.
Torque Converter Lockup Clutch Regulating Valve, Function
Fig. 80: Torque Converter Lockup Clutch Regulating Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation - The converter lockup clutch regulating valve (27) regulates the working pressure in the converter

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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lockup clutch (p-KUB) depending on the control pressure in converter lockup clutch (p-S/KUB). See Fig. 80.
Depending on the working pressure in the converter lockup clutch (p-KUB) the converter lockup clutch (KUB)
is:
Engaged
Disengaged
N slip mode
In the lower position of the converter lockup clutch regulating valve (27) lubricating oil (p-Sm) flows through
the torque converter and oil cooler (65) into the transmission (converter lockup clutch depressurized). In its
regulating position (slipping, torque converter lockup clutch pressurized), a reduced volume of lubricating oil
(p-Sm) flows through the annular passage (27a) bypassing the torque converter and passing direct through the
oil cooler (65) into the transmission. The other part of the lubricating oil (p-Sm) is led via the restrictor (a) into
the torque converter for cooling the converter lockup clutch (KUB).
R/P Lock, Location/Task/Design/Function

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