Gearbox Clutch CVs - Adjusting 4 speed change mechanism
(Penned by Itchyfeet)
This is the 'book' method of setting up the gearchange mechanism and assumes that all linkage parts are new or in very good order.
If parts are worn or even broken, refer to:
Please note, 5-speed adjustment is slightly different. See: http://wiki.club8090.co.uk/index.php/Gearbox_Clutch_CVs_-_Renovating_5_speed_change_mechanism_-_adjustments
Adjustment of 4-speed shift assembly
In the cab, rotate the plate (pictured below) so that one stud is touching one side of a slot and the other stud the other side.
Then up the front (underneath) add a spacer in the shift housing
Haynes and Bentley specify 23mm, I cut a slice off a piece of wood for this.
Then make sure the rear selector lever is vertical, tighten the pinch bolt and remove the spacer
Check all gears work, if not then play with the bearing adjustment.
Finally, heres an animation of the 4-speed selection process looking underneath from behind the box: