23
W
11
9-022
1
E
G-5.
G-5.
Counterbalance Valve (Telescoping)
2. Function
IW119-022003
B
C
A
P.P
a
b
This counterbalance valve prevents the actuator
from being driven by the load and its own weight
faster than the speed corresponding to the oil
supply rate.
2.
1
When control valve is at the neutral position
The actuator holding pressure is sealed by seat
“a” of the main spool and seat “b” of the check
valve.
2.2 While actuator is being pushed up
1
. The pressurized oil entering through port A of the
control valve enters chamber C, flows out through
port B by opening the check valve, and enters the
holding side of the actuator.
2. At this time, since port PP is connected to the tank
circuit, the main spool is kept forced to the valve
body by the spring, and remains inactive.
2.3 While actuator descends
1
. The hydraulic oil directly flowing from the control
valve to the actuator also enters through port PP
to exert force to the main spool to move the main
spool.
2. Consequently, the holding hydraulic pressure in
port B is vented to port A.
3. At this time, the main spool motion is smoothened
by orifices.
△
0
366-054-80000
Содержание TT-800XXL1
Страница 20: ...B 2 B 2 Hydraulic Pump 3 W101 0280E 1 2 Inside view Variable displacement piston pump...
Страница 25: ...8 W101 0280E B 2 B 2 Hydraulic Pump 1 Joint control piston 2 Hanger 3 Metal 4 Orifice Hanger section 6 7...
Страница 114: ...5 G 2 G 2 Boom Five Section Boom 5 W536 0760E G 2...
Страница 166: ...13 13 W701 0160E K 2 K 2 Air Conditioner K 2 4 Layout 4 1 Overall layout...
Страница 167: ...14 14 W701 0160E K 2 K 2 Air Conditioner K 2 4 2 Overall layout...
Страница 168: ...15 15 W701 0160E K 2 K 2 Air Conditioner K 2 4 3 Evaporator section...
Страница 169: ...16 W701 0160E K 2 K 2 Air Conditioner 5 Compressor ass y...
Страница 170: ...17 17 W701 0160E K 2 K 2 Air Conditioner K 2 6 Evaporator ass y...
Страница 171: ...18 18 W701 0160E K 2 K 2 Air Conditioner K 2 7 Condenser ass y...
Страница 172: ...19 19 W701 0160E K 2 K 2 Air Conditioner K 2 8 Electric 8 1 Electric circuit 0 363 205 60030...
Страница 173: ...20 20 W701 0160E K 2 K 2 Air Conditioner K 2 8 2 Main harness A...
Страница 174: ...21 21 W701 0160E K 2 K 2 Air Conditioner K 2 8 3 Main harness B...
Страница 227: ...Hydraulic Pressure Setting Table 1 WY02 0320E 1 Y 1 Y 1 Y 1 Hydraulic Pressure Setting Table 1 345 801 01500...
Страница 254: ...Location of Hydraulic Parts 4 WZ07 0780E 4 Z 4 Z 4 Z 4 Location of Hydraulic Parts...
Страница 259: ...Hydraulic Electric Carrier Equipment Comparison Table Z 8 Z 8 Z 8 9 WZ09 0130E 9...
Страница 262: ...Z 11 Z 11 Harness Swing Table Right Z 11 11 WZ04 1300E 11 Harness Swing Table Right 5 343 530 32010...
Страница 263: ...Z 12 Z 12 Harness Boom Z 12 12 WZ04 1310E 12 Harness Boom 1 2 2 343 530 32040 1 343 530 22030...
Страница 265: ...14 WZ04 1320E 14 Z 14 Z 14 Harness Lower Z 14 Harness Lower Applicable serial No 475334 1 1 336 500 30021...
Страница 266: ...Z 15 Z 15 Harness Outrigger Operation Option Z 15 15 WZ04 1330E 15 Harness Outrigger Operation Option 0 333 316 60020...