ADJUSTING THE FORK(RATIOS 1, 2, 3 AND 4

– Fit a flat plate (1) to compress the springs and plungers on the forks.

1 2 3

323msm26 Fig. 20

– Position a dial gauge on the end of the shaft of the fork to be adjusted(example: ratios 1 and 2). – Select the synchro to neutral. – Engage a gear ratio(example: gear 1). – Measure the axial backlash using a dial gauge. – Engage the other ratio(example: gear 2). – Measure the backlash. – Take the mean of the two readings. – Where necessary, offset the fork in relation to its shaft by: – Tightening screw (2) and slackening screw (3). – Slackening screw (2) and tightening screw (3). The setting is attained when the mean value is obtained on the dial gauge. – Repeat the same operation on the synchro unit for the 3rd and 4th gear ratios. – Adjustment of the 5th gear ratio and the ranges is achieved using a set of feeler gauges positioned between the sliding gear and the fork. The same value of backlash must be obtained on each side.

Important: Check that there is backlash between the fork and the sliding gear to avoid friction and premature wear in the syncho bushes.

Final steps

– Fit the internal greasing circuit. Refer to the part: 0230 Lubrication. – Refit the covers to the gearbox. – Couple the rear axle with the gearbox. – .Refit the input unit. – Refit the controls, the shafts and forks in the input unit. – Refit the clutch limit stops and controls. – Connect the gearbox with the engine casing. – Refit the PTO gearbox. – Refit the front axle transmission shaft. – Refit the cab. Refer to the part: 1210 Cab–Refitting operation.