Removing and Installing Control Valve Body

Removing, Installing, Disassembling and Assembling Control Valve Body






Oil drain plug (4a)
Drain oil, pour in after repairs and adjust to correct level, 14 Nm.

Bolts (4)
Unscrew, screw in, 8 Nm, take off oil sump (3), check gasket (3a).

Control valve body (A)
Remove, install by unscrewing, screwing in bolts (7), 8 Nm, pay attention to different bolt length. Range selector valve (A1) must engage in driver.

Control valve body and pickup housing
Disassemble and assemble.


Removal and Installation






1. Unscrew drain plug (4a) and allow oil to drain out.

2. Unscrew fastening bolts (4) and take off oil sump (3).

3. Move shift lever to position "P".

4. Unscrew bolts (7) and take off control valve body (A).






Installation Instruction

The three bolts (7a) are 50 mm long, the remaining bolts 55 mm long. Tightening torque 8 Nm.






Ensure that the range selector slide valve (A1) engages in the driver (arrow).

Disassembly and Assembly

Note:
It is important to ensure scrupulous cleanliness when performing any work on the control valve body. The work should be performed, if possible, on a plastic base. Do not use any fluffing cloths; chamois leather is best suited for this work. After disassembly, all the parts must be washed and blown dry with compressed air.

There are 19 or 18 valve balls, respectively. in the control valve body. When disassembling, ensure that the balls do not roll away. During assembly, the balls must be inserted at the correct points.

5. Unscrew bolts (arrows). Take off valves (13, 24 and 86) and also swart strainer (33a).

Note:
On transmission 722.404/405/407 the butterfly valve is red/green and, on the remaining transmissions, it is red/black, white/black and white/blue.

The swart strainer (33a) in the feed passage to the B2 shift valve is fitted effective Transmission End No.292 008. It can also be fitted to transmissions with a lower Transmission End No. Part No 126 270 02 98.

6. Hold control valve body (A) and pickup housing (B) together and turn over.






Installation instruction

Tighten bolts only slightly so that both housing parts can still be shifted relative to each other to the extent that the bolts permit.

Insert valves (13, 24, 86) and swart strainer (33a) into the control valve body.

7. Carefully lilt off pickup housing (B) together with intermediate plate (4).






8. Remove all 18 or 19 valve balls (14). The valve ball marked with the number 14 is resting on a conical spring.

9. Withdraw valves, filter and shift pin.






10. If necessary, unscrew side covers from the control valve body, check that pistons and valves move freely and are free of swarf.






11. If necessary unscrew side cover from pickup body, check pistons and valves for accuracy and swart.





Installation instruction

Depending on the transmission of vehicle model, the springs are installed in front of or after the slide valve. For this reason, when disassembling the slide valve or pickup housing, pay attention to the order in which the valves and springs are inserted.

12. The arrow indicates the position of the hexagon socket bolts for the full throttle control pressure. Turning counter-clockwise advances full load or kickdown upshifts. Turning in the opposite direction retards upshifts.