Massey Ferguson 5400 - Issue 1.a
09I01.9
Unassisted brake master cylinders
D . Single circuit master cylinders
(without trailer brake)
Operation
Pedals uncoupled (Fig. 7)
The effort applied to a pedal is transmitted by the
rod (5) to the piston (4) which moves in the bore of the
active master cylinder. The valve (1) closes the supply
port. The balancing valve (3) is opened by the piston (4)
and valve ball (2). Oil under pressure is directed to the
main brake ports (C) and the pressure balancing
junction (D).
Via the balancing junction, the pressure closes the
valve (3) of the passive master cylinder .
Pedals coupled
• Braking and pressure balancing
The effort applied to the two pedals is transmitted by
the rods (5) to the pistons (4) which move in the
bores of the two master cylinders. The two
valves (1) close the supply ports. The two balancing
valves (3) are opened by the pistons (4) and valve
balls (2). Pressure balancing is ensured in the two
master cylinders by the balancing junction (D).
Oil under pressure is also directed to the ports (C)
and (C’) of the main brake circuit.
Legend (Fig. 7)
B Master cylinder level kept constant by the lubri-
cating and booster circuit (Fig. 3)
C Supply to main brake
D Pressure balancing junction
Fig. 6
MA-09-05066A
1 2 3 4 5
B
C D
Fig. 7
To Next Page
Loading...
