Disassembling and assembling the gear shift plate (Mercedes-Benz S-Class W140)

Gear shift plate
A — Working pressure adjustment valve. Lubrication pressure adjustment valve. 2-3 gear overlap adjustment valve
B — 1-2/4-5 gear engagement unit

Gear shift pressure control valve
C — 3-4 gear engagement unit
D — 2-3 gear engagement unit. Adjusting valve locking clutch. Adjusting valve B2

Disassembly

Disassembling the gear shift plate
71 - Bolts; 72 - Valve assembly cover; 73 - Sealing plate; 74 - Valve assembly; 82 - Retainer

Disassembling the gear shift plate
59 - Guide pin; 75 - Plastic Ball Valves; 76 - Steel Ball Valves; 143 - Central lock

Disassembling the gear shift plate
72 - Valve assembly; 72.1 - Gear selector valve; 72.2 - 2-3 gear overlap adjustment valve with sleeve and piston; 72.3 - Lubrication pressure control valve; 72.4 - Working pressure regulation valve; 72.5 - 3-4 gear engagement locking valve; 72.6 - 3-4 gear shift control valve; 72.7 - 3-4 gear pressure switching valve; 72.8 - 3-4 gear overlap adjustment valve with sleeve and piston

Disassembling the gear shift plate
74 - Valve assembly; 74.14 - 1-2/4-5 gear shift control valve; 74.15 - 1-2/4-5 gear engagement locking valve; 74.18 - 1-2/4-5 gear overlap adjustment valve with sleeve and piston; 74.19 - Gearshift Pressure Regulating Valve; 74.20 - Pressure regulating valve control valve; 74.21 - Changeover valve pressure control valve; 74.22 - Torque converter lock-up adjustment valve; 74.24 - Pressure switching valve when engaging 3-4 gears; 74.25 - 2-3 gear engagement control valve; 74.26 - 2-3 gear engagement locking valve; 74.27 - Switching valve B2

1. Unscrew the fasteners (82).

2. Unscrew the bolts (71).

3. Remove the valve assembly cover (72) from the valve assembly (74).

(Original published on the website: MercedesMAN.ru)

4. Remove the sealing plate (73). All 12 balls are located in the valve body, four 75 of which are plastic, the remaining eight (76) are steel.

5. Unscrew the valve body covers. The bushings and pistons of the adjusting valves (72.2), (72.8) and (74.18) must not be mixed.

6. The B2 switching valve can be removed and installed when the valve body cover is removed.