Control axis
The control shaft is provided with a shut-off valve attached to the crankcase A. The tightness is ensured by the O-ring B.
After removing the select lever pins C, remove the mounting bolts and control assembly.
Shaft installation
Install input shaft and output shaft with ½ yoke at the same time.
Install the ½ A stem lock pin and the 5th gear stem lock pin B.
Raise the 3/4 hub slightly and install the yoke and 3/4 stem.
Insert the pins into the fork using tool B. Vi. 949.
Install fifth gear shaft A and reverse shaft B. To do this, slightly raise the input shaft.
Install the ½ and 3/4 locking springs and balls into the crankcase and compress them with tool B. Vi. 1570.
Apply Loctite 518 to the joint surface.
Set third gear.
Position the crankcase with the control shaft in 3rd gear and install the spring and ball to lock until the 5th gear stem appears.
Squeeze the ball to lock and finish installing the crankcase.
Remove tool B. Vi. 1570. Rotate the input shaft to properly install the bearings and tighten the tightening bolt torque (25 Nm).
Install reverse axle A.
Apply three drops of Loctite Frenbloc to the splines of the constant mesh gear and install with tool B. Vi. 1175.
Install on the input shaft:
- support ring (larger side to the gear);
- bushing under the gear;
- a fifth gear parasitic gear provided with a synchronizing ring;
- fifth gear hub with spring.
With the help of B. Vi. 31-01 (core), install the fifth gear fork pin.
Engage first gear with the shift lever, and fifth gear by sliding its fork along the stem.
Tighten the gear bolt and nut to:
- input shaft nut - 25 Nm;
- output shaft bolt - 160 Nm.
Set the transmission to neutral.
Install a new sealing ring.
Install the back cover and tighten the bolts to the torque (25 Nm).
Reinstall the reverse contactor.
Reinstall the speed sensor for the JH semi-automatic transmission.
Install the clutch release slave cylinder and tighten the bolts to 21 Nm.
Install the differential output shaft seal using tool B. Vi. 945.
Place the oil-lubricated guard A on the planetary gear and fit the oil-lubricated collar C using tool B.