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SECTION 21 -- TRANSMISSIONS -- CHAPTER 2
603.54.471.00 -- 11 -- 2004
DESCRIPTION AND OPERATION
The synchroniser reverser is a mechanical device
which makes it possible to obtain 12 forward and 12
reverse gears. It is controlled by a specific lever loca-
ted on the platform to the left of the operator.
The synchroniser reverser is comprised of a group
of three spur gears : driving reverser gear, interme-
diate gear and driven reverser gear. Selection is ef-
fected by means of a synchroniser located in the
group of gears.
The synchroniser reverser is installed inside the
clutch casing between the clutch and the gearbox.
It is lubricated by the oil in the rear transmission /
gearbox.
SYNCHRONISER REVERSER TROUBLESHOOTING
Problems
Possible causes Remedies
Spontaneous disengagement of
the synchroniser reverser.
1. Incorrect adjustment of exter-
nal levers and linkages.
Adjust correctly.
2. Synchroniser engagement
teeth damaged.
Remove the clutch casing and re-
place the synchroniser .
3. Engagement travel incom-
plete.
Eliminate the cause and restore full
engagement travel.
Difficulty in engaging the reverser .
1. Incorrect adjustment of exter-
nal levers and linkages.
Adjust correctly.
2. Stiffness and / or partial sei-
zure of external levers and
linkages.
Check pivot points and lubricate.
3. Dragging of main clutch. See page 5, Sect. 18.
4. Synchroniser damaged. Remove the clutch casing and re-
place the synchroniser .
5. Internal controls do not slide
freely: rods, forks and
sleeves.
Perform the checks and overhaul for
needed parts.
Synchroniser reverser unduly
noisy.
1. Worn or damaged internal
part/s.
Remove the clutch casing and re-
place damaged part/s.
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