Design of the gearbox
Gear synchronisation
A balked synchromesh with locking pieces is used in the case of all gears to synchronise the different speeds when
changing gears. Depending on the shifting load, the gears are synchronised one- to three-fold.
Gear
1st to 3rd
4th
Synchromesh
Three-fold
Two-fold
Synchroniser ring material
Brass with molybdenum coating
Brass with molybdenum coating
Brass with molybdenum coating
Brass with molybdenum coating
5th to 7th
R
One-fold
One-fold
lk
The figure shows the synchromesh design for 2nd, 4th and R gears.
Selector fork
Firmly connected
(welded)
Selector gear
2nd gear
Outer ring
(intermediate
ring)
Synchronising hub
Synchroniser
Synchroniser
Sliding sleeve
Synchroniser ring
ring
(inner)
ring
(outer)
Locking pieces
(outer)
S390_081
Clutch splines
Intermediate ring
Synchroniser ring
(inner)
Selector gear
4th gear
Sliding sleeve
Selector gear R gear
Locking pieces
Synchroniser ring
S390_082
Synchronising hub
28
English 