Massey Ferguson 5400 - Issue 1.b
09D01.4
Trailer braking - Open centre
Description of the braking valve (Fig. 2)
Flow control valve (1) ensures control of the Qx flow
rate and adjusts the hydraulic flow, transmitting the
pressure to the trailer brakes (Fig. 5 - Fig. 6, Fig. 8 and
Fig. 9).
Control spool assembly (2) ensures the control of the
flow control valve and adjusts the pressure in the
trailer brakes
Non-return valve (3) stops the return of oil from brake
pipe B to port N (Fig. 5 to Fig. 10)
Pressure relief-valve (4) with loaded springs (8)
limits brake pressure
Pilot flow housing (5) with piston (6) and bleed screw
(7), controls the trailer brake valve via the tractor
braking system.
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