Synchroniser Ring Assembly 135mm Reinforced Molybdenum

Groove width 10.6mm

Forward/reverse synchroniser fails.

Shuttle is difficult to switch between forward and reverse operation.

Synchroniser unit shows excessive wear with few hours of operation.

An improved synchroniser unit has been introduced and has an important change in the material of the synchroniser unit from bronze to molybdenum. This improvement affects machines with mechanical reversing gears.

The improved synchroniser reduces the wear rate of the friction surface. In addition, an improvement in the lubrication system has been introduced in the production machines from the serial numbers listed below. The lubrication improvement applies only to machines with hydraulically engaged four-wheel drive (4WD) and differential lock (DL) systems.

NOTE: This lubrication improvement cannot be applied to machine variants with mechanically controlled 4WD and DL.

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Important notice to the customer !

On machines with 12 x 12 or 20 x 12 mechanical shuttle gearboxes, the operating manual states that when selecting or changing the direction of travel from forward to reverse while driving, the clutch pedal does not need to be depressed and the machine does not need to be brought to a complete stop until the opposite direction is selected.

This information is incorrect as it will damage the inner synchroniser.

You must inform the driver of the correct procedure for changing direction:

"To change direction from forward to reverse or reverse to forward using the mechanical shuttle lever, depress the clutch and brake pedal and bring the vehicle to a complete stop. Lift the shuttle lever (2), see annex, figure 1, and move it backwards to position (A) to engage reverse gear or forwards (B) to engage forward gear. (The tractor must come to a complete stop before operating the direction when using the mechanical shuttle control lever)".