30980
Figure 2
GRAPHIC REPRESENTATION OF THE PNEUMATIC SYSTEM TO CONTROL THE E.R.U. IN GEARBOX 9 S 109 D.D.
Gearshifting in the four forward speed and pickup speed part and that in the E.R.U. is through double H mechanical control.
E.R.U. switching is through pneumatic system when III-IV speed position is changed into that for V-VI speed selection or viceversa.
The control system to switch the E.R.U is made up of a control valve (8) and a control cylinder (5) integral with the gearbox.
The control valve (8) is controlled by the shaft (6), lets the air under pressure go through to feed the cylinder (5) only when the
shaft (6) is in neutral position.
4
GEARBOX ZF 9 S 109 D.D.
S
TRALIS
AT/AD
Base - January 2003