3
CF65/75/85 series Description of components
AS TRONIC GEARBOX
2-5
The transmission brake is operated
pneumatically by the piston (4). During changing
up the speeds of the secondary shafts, and
therefore the speeds of the main-box gear
wheels too, must be braked in respect of the
main shaft.
This is necessary so as to engage a subsequent
gear and because the main box has not been
synchronised.
The transmission brake is actuated by a
solenoid valve in the gearbox modulator. This
valve actuates the piston (4) pneumatically via
an air duct in the gearbox housing and the air
duct (1) in the cover.
The adjustable air pressure will cause the
piston (4) to move the lamellae (5, 6) against the
clutch cover (7). The clutch cover (7) and the
pressure plates (5) are locked in position relative
to the gearbox housing by means of recesses
and pins (12).
In this way the auxiliary shaft (13) can be
braked, so that gears can be shifted.
After a change of gear, the clutch of the
transmission brake is no longer operated. The
spring (10) and hollow pin (9) in the auxiliary
shaft (13) force the piston back, so that the
clutch is released.
A metal hit pin (11) serves to reduce wear of the
lightweight-metal piston (4).
10
8
7
12
5
613
1
3
4
11
9
V300709
2
14
ᓻ 200337
https://www.truck-manuals.net/
To Next Page
Loading...
