DEUTZ-FAHR AGROTRON 106 MK3, Workshop Manual, Page: 54 / 150

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2.3 TRAILER BRAKING SYSTEM
The tractor may be equipped with one of the four following trailer braking systems:
1. hydraulic trailer braking (Italy version)
2. hydraulic trailer braking (Export version)
3. air trailer braking (Italy version)
4. air trailer braking (Export version)
2.3.1 HYDRAULIC TRAILER BRAKING (ITALY VERSION)
1. Valve activation lever in position “1”
•
When the lever (1) is in position “1” (valve activated) and the brake pedals are not pressed, a pressure of 12.5 bar
(181.3 psi) is available at port
B .
•
This pressure is supplied constantly to the trailer to release the parking brake.
•
When the operator engages the parking brake, the solenoid valve (2) is energised; this nullifies the pressure at
port
B .
•
The pressure at port B is directly proportional to the pressure present in the tractor braking circuits Y .
2. Valve activation lever in position “O”
•
When the lever (1) is in position “ O ” (valve deactivated), there is no pressure at port B .
In this condition, the pressure at port B is always null independently of the pressure in the tractor braking circuits.
D0004540
1
Freno a mano
2
P
B
N LS
Y
1
Hand brake
BRAKING SYSTEM TRAILER BRAKING SYSTEM