gf2760s4015a

Valves, location/task/function

Type gf · emne 27.60 · version 0102 · 1999-08-16

Gælder for: MODEL 638 with ENGINE 111.948 /978, 601.970 with CODE (G40) Automatic transmission MODEL 638 with ENGINE 611.980 with CODE (G40) Automatic transmission with CODE (MQ4) Engine OM611 DE22 LA (75 KW) with CODE (MQ5) Engine OM611 DE22 LA (90 KW) MODEL 638 with ENGINE 111.950 /980 with CODE (G40) Automatic transmission with CODE (MR7) Engine M111 E20 (95 kW) Euro III with CODE (MR8) Engine M111 E20 (105 Kw) Euro III

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Placering

Funktionsgruppe 2 Chassis › 27 Automatgearkasse › 27.60 Gearskifte, styring — Serie 601 (modeller 970) · Serie 611 (modeller 980) · Serie 638

Gælder også for motorer/gearkasser: 111 948, 111 950, 111 978, 111 980

GF27.60-S-4015A

Valves, location/task/function

16.7.97

MODEL 638 with ENGINE 111.948 /978, 601.970 with CODE (G40) Automatic transmission

MODEL 638 with ENGINE 611.980
with CODE (G40) Automatic transmission
with CODE (MQ4) Engine OM611 DE22 LA (75 KW)
with CODE (MQ5) Engine OM611 DE22 LA (90 KW)

MODEL 638 with ENGINE 111.950 /980
with CODE (G40) Automatic transmission
with CODE (MR7) Engine M111 E20 (95 kW) Euro III
with CODE (MR8) Engine M111 E20 (105 Kw) Euro III

Valves, location/task/function

S27.60-0501-09

Location

1 System pressure valve

2 Pressure reducing valve

3.1 Clutch valve B

3.2 Clutch valve C

3.3 Clutch valve D

3.4 Clutch valve F

8 Safety valve

9 Converter pressure valve

10 Torque converter lock-up clutch valve

11 Lubricating valve

12 Solenoid valve

13 Electric pressure control valve

4 Clutch valve E

5.1 Holding valve B

5.2 Holding valve C

5.3 Holding valve D

5.4 Holding valve F

6 Holding valve E

7 Shift valve

Valves, location

GF27.60-S-4015-01A

System pressure valve (1), task/function

Determines the general pressure level in the control system. It supplies the clutches as a priority (when the system pressure is reached). The cooling or lubricating oil then goes to the converter. Outside of the shift, the system pressure is switched between two levels depending on the turbine torque.

Pressure reducing valve (2), task/function

It reduces the system pressure which is applied to the downstream solenoid valves and electric pressure control valves (EDS). Consequently smaller solenoid valves can be used. The electric pressure control valves require a constant supply pressure.

Clutch valves, task/function

Clutch valve B (3.1)

Clutch valve C (3.2)

Clutch valve D (3.3)

Clutch valve F. (3.4)

In principle they are the follower valves of the respective electric pressure control valves (EDS). They are required to bring the required volume flow to the appropriate clutch. In addition, gear-dependent pressure transmission takes place via them.

Clutch valve (KV-E) (4), task/function

Basically the same versions apply here as for the other clutch valves. The clutch valve (KV-E) also has the additional task of pressure limiting for clutch E.

Holding valves, task/function

Holding valve B (5.1)

Holding valve C (5.2)

Holding valve D (5.3)

Holding valve F (5.4)

They ensure that, at a preset electric pressure control valve (EDS) pressure level, the appropriate clutch valves are connected and therefore the clutch pressure increases to system pressure. This allows a better resolution of the control range of the clutch valves.

Holding valve, task/function

(Holding valve E) (6)

It ensures that, at a certain electric pressure control valve (EDS) pressure level, the clutch valve E switches the clutch pressure E to the maximum permissible value. In addition, the control range of clutch F is lowered in 2nd gear. Clutch valve C is supplied with system pressure.

Shift valve (7), task/function

By means of the shift valve the function of electric pressure control valve (EDS) 3 is used for the 1-2 shift or the converter lock-up clutch shift.

Safety valve (8), task/function

If there is a power failure while driving clutch C is engaged or held, if it was already engaged, via the safety valve. Together with clutch E this results in 4th gear. When starting again and in ETC emergency mode, pressure is applied to clutch B via the safety valve. Together with clutch E this results in 3rd gear. The safety valve has a self-holding system which is cancelled when starting again and is reactivated by the ETC.

Converter pressure valve (WD-V) (9), task/function

Its task is to supply the converter with cooling oil in the open position. When the torque converter lock-up clutch is closed, the supply line to the converter is interrupted and so depressurizes space between the converter lock-up clutch and converter cover.

Converter lock-up clutch valve (KÜB-V) (10), task/function

In principle it is the follower valve of electric pressure control valve EDS3 when solenoid valve 2 is not energized. It is required to bring the volume flow to the converter lock-up clutch. In addition the required pressure transmission takes place via the converter lock-up clutch valve.

Lubricating valve (11), task/function

It ensures that the converter is supplied with cooling oil first when the delivery volume of the pump is low. In addition it guarantees the required quantity of cooling or lubricating oil via the bypass channel.

Solenoid valve (12), task/function

The hydraulic control module has two 3/2 solenoid valves. 3/2 means 3 connections and 2 positions. They are actuated by the ETC and have a Yes/No function. They serve to switch over valves in the hydraulic control module.

Electric pressure control valve (EDS) (13), task/function

An electric pressure control valve converts electric current into proportional hydraulic pressure. The electric pressure control valves (EDS) are actuated by the ETC. They operate the valves associated with the actuators.

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