5-M9
M8540, M9540, WSM
BRAKES
Q
Maximum Braking of Trailer Brake - Braking
Pressure Limited
Flow control valve (10) and control spool (2) have the
same spool positions (
a
and
d
) as in the case of partial
braking.
The fluid flows
Qp
and
Qx
pass as with partial
braking.
The maximum permissible trailer braking pressure
Pb
(e.g. 150 bar) has been reached. An even further
increase of the trailer braking pressure is prevented,
even if the tractor braking pressure rises further. The
pressure relief element (3) is now shifted to the left. The
springs (4), which are pre-loaded to the maximum
permissible trailer braking pressure
Pb
, are compressed.
If the trailer braking pressure
Pb
also rises, e.g. owing
to external factor, control spool (2) momentarily opens
brake line
B
to the reservoir and avoids further increasing
of the braking pressure.
In all control positions of the trailer brake valve, the
tractor hydraulics can be used and pressurized as
desired through port
N
. This does not have any
important effect on the trailer brake. The trailer brake
has precedence over the tractor hydraulics. The
maximum pressure of the tractor hydraulics may be
higher than the maximum trailer braking pressure.
W1017159
(1) Piston Surface
(2) Control Spool
(3) Pressure Relief Element
(4) Spring
(5) Bleed Valve
(6) Control Head
(7) Piston
(8) Bore
(9) Throttle
(10) Flow Control Valve
(11) Restrictor
(12) Bore
(13) Check Valve
P : Port for 3P Hydraulic Pump
N : Port for 3P Control Valve
B : Port for Trailer Brake
R : Port for Reservoir
(Transmission Case)
X : Port for Tractor Service
Brake
Qp : Delivery Flow
Qx : Control Flow
KiSC issued 09, 2008 A
Summary of Contents for M9540
Page 1: ...M8540 M9540 WORKSHOP MANUAL TRACTOR KiSC issued 09 2008 A...
Page 8: ...6 M8540 M9540 WSM SAFETY INSTRUCTIONS KiSC issued 09 2008 A...
Page 9: ...7 M8540 M9540 WSM SAFETY INSTRUCTIONS KiSC issued 09 2008 A...
Page 10: ...8 M8540 M9540 WSM SAFETY INSTRUCTIONS Q CABIN Model KiSC issued 09 2008 A...
Page 11: ...9 M8540 M9540 WSM SAFETY INSTRUCTIONS KiSC issued 09 2008 A...
Page 12: ...10 M8540 M9540 WSM SAFETY INSTRUCTIONS KiSC issued 09 2008 A...
Page 16: ...14 M8540 M9540 WSM DIMENSIONS DIMENSIONS ROPS Model KiSC issued 09 2008 A...
Page 17: ...15 M8540 M9540 WSM DIMENSIONS CABIN Model KiSC issued 09 2008 A...
Page 18: ...G GENERAL KiSC issued 09 2008 A...
Page 103: ...1 ENGINE KiSC issued 09 2008 A...
Page 203: ...2 CLUTCH KiSC issued 09 2008 A...
Page 219: ...3 TRANSMISSION KiSC issued 09 2008 A...
Page 322: ...4 REAR AXLE KiSC issued 09 2008 A...
Page 323: ...CONTENTS MECHANISM 1 FEATURES 4 M1 KiSC issued 09 2008 A...
Page 336: ...5 BRAKES KiSC issued 09 2008 A...
Page 374: ...6 FRONT AXLE KiSC issued 09 2008 A...
Page 401: ...7 STEERING KiSC issued 09 2008 A...
Page 402: ...CONTENTS MECHANISM 1 STEERING MECHANISM 7 M1 2 STEERING CYLINDER 7 M2 KiSC issued 09 2008 A...
Page 420: ...8 HYDRAULIC SYSTEM KiSC issued 09 2008 A...
Page 473: ...9 ELECTRICAL SYSTEM KiSC issued 09 2008 A...
Page 554: ...10 CABIN KiSC issued 09 2008 A...