Shifting N to D (1st gear), function - GF27.60-P-4014G
TRANSMISSION 722.6 up to 30.6.96
Function in selector lever position "N"
Function in selector lever position "D" (gearshift)
Function in selector lever position "N"
No pressure is applied to the rear multiple-disc brake piston (B2a), the shift side and opposite side are emptied via the selector valve (52).
The 3-4 shift solenoid valve (Y3/6y4) is activated. The shift valve pressure (p-SV) acts on the end face of the 3-4 command valve (31c) against the spring force towards the right.
The 3-4 holding pressure shift valve (28c) is held in the left-hand position by the spring. The shift pressure regulating valve (24) regulates a maximum shift pressure. This reaches the rear multiple-disc clutch (K3) via the 3-4 shift pressure shift valve (29c) and the 3-4 command valve (31c). The 3-4 overlap regulating valve (30c) is held in the position on the right by the shift pressure.
Function in selector lever position "D" (gearshift)
The shift pressure is reduced with the aid of the shift pressure regulating solenoid valve (Y3/6y2) via the shift pressure regulating valve (24). This moves the 3-4 overlap regulating valve (30c) to the regulation position. Via the 3-4 overlap regulating valve (30c), the 3-4 shift pressure shift valve (29c), 3-4 command valve (31c), selector valve (52) and shift valve B2 (26), pressure oil reaches the rear multiple-disc brake piston (B2a) on the shift side and opposite side.
The rear multiple-disc brake is engaged with a reduced effective area for reasons of comfort. The 3-4 holding pressure shift valve (28c) switches to the right as soon as the B2 pressure acting on the end face exceeds the spring force.
| Shift from 1 to 2, function | GF27.60-P-4013G |