02 Transmission/clutch 02 30 Mechanical reducer
Adjusting the fork (ratios 1, 2, 3 and 4)
– Take the mean of the two readings.
– Fit a flat plate (1) to compress the springs and plungers on the forks.
– Tightening screw (2) and slackening screw (3).
– Where necessary, offset the fork in relation to its shaft by: – 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.
1
2
3
Final steps – Fit the internal greasing circuit. Refer to the part: 02 30 Lubrication. – Refit the covers to the gearbox. – Couple the rear axle with the gearbox.
323msm26
Fig. 20
– .Refit the input unit.
– Position a dial gauge on the end of the shaft of the fork to be adjusted (example : ratios 1 and 2).
– Refit the controls, the shafts and forks in the input unit.
– Select the synchro to neutral.
– Connect the gearbox with the engine casing.
– Engage a gear ratio (example: gear 1).
– Refit the PTO gearbox.
– Measure the axial backlash using a dial gauge.
– Refit the front axle transmission shaft.
– Engage the other ratio (example: gear 2).
– Refit the cab.
– Measure the backlash.
Refer to the part: 12 10 Cab – Refitting operation.
– Refit the clutch limit stops and controls.
Axos 340-310 – 08.2009 – GB
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