COMPONENT OPERATION / Brake Valve
T3-11-5
When Brake is Applied
1. When the brake pedal is depressed, spool input
(3) is pushed via roller (2).
Spool input (3) moves spools (7, 8) forward via
spring (5).
2. When spools (7, 8) are moved forward, ports (BR1,
BR2) and port (T) are disconnected. When spools
(7, 8) are further moved forward, ports (BR1, BR2)
and ports (M1, M2) are connected, and pressure
oil in the accumulator flows from ports (BR1, BR2)
and the brake is applied.
3. Pressure oil at the ports (BR1, BR2) side passes
the orifices in spools (7, 8) and acts on plungers
(10, 11) built in spools (7, 8) as the returning force
(hydraulic reaction force) against spools (7, 8).
Summation of this hydraulic reaction force and the
load of spring (9) balances with the load of spring
(5), and controls the brake oil pressure at the
brake ports (BR1, BR2) side.
4. Deflection and the load of spring (5) are fed back
as the stroke and operating force of the brake
pedal, and provides the operator with virtual
operation feeling.
T4GB-03-11-005
T
M2
M1
BR1
BR2
2
3
5
11
10
9
7
8
Summary of Contents for ZW180
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Page 8: ...4GDT 1 2 Blank ...
Page 10: ...GENERAL Specification T1 1 2 Blank ...
Page 38: ...GENERAL Component Specifications T1 3 14 Blank ...
Page 39: ...MEMO ...
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Page 42: ...4GDT 2 2 Blank ...
Page 56: ...SYSTEM Control System T2 1 14 Blank ...
Page 82: ...SYSTEM Control System T2 1 40 Blank ...
Page 92: ...SYSTEM Control System T2 1 50 Blank ...
Page 106: ...SYSTEM Control System T2 1 64 Blank ...
Page 116: ...SYSTEM ECM System T2 2 10 Blank ...
Page 128: ...SYSTEM Hydraulic System T2 3 12 Blank ...
Page 147: ...SYSTEM Hydraulic System T2 3 31 Blank ...
Page 150: ...SYSTEM Hydraulic System T2 3 34 Blank ...
Page 184: ...SYSTEM Electric System T2 4 34 Blank ...
Page 185: ...MEMO ...
Page 186: ...MEMO ...
Page 195: ...COMPONENT OPERATION Pump Device T3 1 7 Blank ...
Page 212: ...COMPONENT OPERATION Control Valve T3 2 4 T4GB 03 02 003 1 2 3 4 5 7 8 9 10 11 7 6 ...
Page 214: ...COMPONENT OPERATION Control Valve T3 2 6 T4GB 03 02 003 1 2 3 4 5 7 8 9 10 11 7 6 ...
Page 226: ...COMPONENT OPERATION Control Valve T3 2 18 Blank ...
Page 232: ...COMPONENT OPERATION Control Valve T3 2 24 Blank ...
Page 248: ...COMPONENT OPERATION Steering Pilot Valve T3 4 6 Blank ...
Page 258: ...COMPONENT OPERATION Steering Valve T3 5 10 Blank ...
Page 274: ...COMPONENT OPERATION Pilot Valve T3 6 16 Blank ...
Page 282: ...COMPONENT OPERATION Pilot Valve T3 6 24 Blank ...
Page 299: ...COMPONENT OPERATION Ride Control Valve T3 8 5 Blank ...
Page 306: ...COMPONENT OPERATION Ride Control Valve T3 8 12 Blank ...
Page 348: ...COMPONENT OPERATION Drive Unit T3 9 42 Blank ...
Page 371: ...MEMO ...
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