11
W119-0501E
F - 4 .
F - 4 .
Counterbalance Valve (W inch)
3. Principle of operation
B
A
B1
Overload relief valve
A1
a
d
b
c
IW119-0500E03
3.1 When control valve is in neutral
The holding pressure of the hydraulic motor is
locked by the seat area a of the check valve, the
land area d of the spool and the overload relief
valve.
3.2 Hoisting up
1. When the control valve sends oil to port A, the oil
pushes open the check valve and flows to port A1
connected to the motor.
2. On the other hand, the return oil from the motor
port enters through port B1, and then, is
discharged through port B to the control valve.
3.3 Hoisting down
1. As oil is sent to port B by the control valve, it flows
to the motor via port B1.
2. The return oil from the motor is blocked at port A1,
to raise the pressure at port B.
3. This pressure flows through choke b in the spool,
enters into chamber c, where it pushes the
plunger to the right by overcoming the spring force,
and opens land d.
4. As a result, the return oil from the motor is
discharged to the control valve via land d to drive
the motor.
5. When the load tends to pull the motor faster than
the speed corresponding to the flow rate to port B,
the pressure in chamber c drops.
6. Maintaining balance with the spring force to
automatically adjust the oil passage area in land d
to prevent the load from falling at speeds faster
than the motor drive speed.
△
0
366-058-20000
Summary of Contents for TR-800XXL4
Page 47: ...B 9 B 9 Rotary Joint 27 W181 0440E Upper view A Lower view B...
Page 119: ...F 1 F 1 Winch System 1 WF02 0251E F 1 Winch System 1 General Hydraulic Circuit for Winch...
Page 135: ...G 1 G 1 Telescoping System 3 WG02 0321E Telescoping cylinder at select...
Page 143: ...G 2 G 2 Boom Five Section Boom G 2 11 W536 0761E 11...
Page 196: ...13 13 W701 0220E K 2 K 2 Air Conditioner K 2 4 Layout 4 1 Overall layout 4 345 107 61000...
Page 197: ...14 14 W701 0220E K 2 K 2 Air Conditioner K 2 4 2 Overall layout 0 345 110 73000...
Page 198: ...15 15 W701 0220E K 2 K 2 Air Conditioner K 2 4 3 Evaporator section 5 345 107 02000...
Page 199: ...16 W701 0220E K 2 K 2 Air Conditioner 5 Compressor Assy...
Page 200: ...17 17 W701 0220E K 2 K 2 Air Conditioner K 2 6 Evaporator Assy...
Page 201: ...18 18 W701 0220E K 2 K 2 Air Conditioner K 2 7 Condenser Assy...
Page 202: ...19 19 W701 0220E K 2 K 2 Air Conditioner K 2 8 Electric 8 1 Electric circuit 0 363 205 60030...
Page 203: ...20 20 W701 0220E K 2 K 2 Air Conditioner K 2 8 2 Main harness A...
Page 204: ...21 21 W701 0220E K 2 K 2 Air Conditioner K 2 8 3 Main harness B...
Page 222: ...39 K 2 K 2 K 2 Air Conditioner 39 W701 0220E 12 2Compressor diagnosis chart 1 2...
Page 223: ...40 K 2 K 2 K 2 Air Conditioner 40 W701 0220E Compressor diagnosis chart 2 2...
Page 224: ...K 2 K 2 Air Conditioner 41 W701 0220E 13 Troubleshooting...
Page 225: ...K 2 K 2 Air Conditioner 42 W701 0220E...
Page 226: ...K 2 K 2 Air Conditioner 43 W701 0220E...
Page 227: ...K 2 K 2 Air Conditioner 44 W701 0220E...
Page 228: ...K 2 K 2 Air Conditioner 45 W701 0220E...
Page 229: ...K 2 K 2 Air Conditioner 46 W701 0220E...
Page 237: ...L 1 L 1 Control System 2 WL02 0090E 2 General of pneumatic control devices Pneumatic Circuit...
Page 291: ...T 5 T 5 Air Dryer 26 W232 0032E Heater View A 39 C B B A 58 59 2 IW232 0030E03...
Page 370: ...8 8 WZ03 3300E Z 5 Z 5 Electric Circuit MDT Carrier Upper Z 5 IWZ03 3300E01...
Page 372: ...10 Z 6 Z 6 Electric Circuit MDT Carrier Lower Z 6 10 WZ03 3310E IWZ03 3310E01...
Page 400: ...38 Z 24 Z 24 Harness Lower Sub 38 WZ04 2450E Z 24 Z 24 Harness Lower Sub 2 349 310 00200...