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3 - 4
Section F
Transmission
9803/6400
Section F
3 - 4
Issue 1
Motor/Gearbox
Operation
(continued)
Counterbalance Valve
(continued)
Counterbalance Operation
Fig. 3 Counterbalance Valve (Counterbalance)
When hydraulic oil delivered from the hydraulic pump is guided to
P1
port of the counterbalance valve through the control valve,
the hydraulic oil goes through the check valve and flows into the piston motor from
M1
port and tries to rotate the motor.
On the other hand, the return oil from the piston motor can flow from
M2
port to the counterbalance valve, but is prevented by
the check valve, so the pump delivery pressure rises. The boosted hydraulic oil at
P1
port side goes past the orifice and works
on the flange face, and resisting the spring on the opposite side with a force proportional to the pressure, it tries to move the
plunger to the right side.
When a certain pressure is reached, the plunger moves towards the right and the hydraulic oil of
M2
port passes through the
notch of the plunger outer perimeter and generates back pressure at
M2
port while flowing to
Ps
port and returns to the tank
through the control valve. When the pump delivery pressure rises, the plunger opening enlarges and the
M2
port back pressure
decreases. In this way, the opening of the plunger automatically adjusts the return side passageway area so the piston motor
will rotate at a speed suitable to
P1
port side pressure, that is, the
P1
port side flow rate.
P
2
P
1
M
2
M
1
Summary of Contents for JS 200 Series
Page 57: ...9 1 Section 3 Routine Maintenance 9803 6400 Section 3 9 1 Issue 2 Component Location Diagram...
Page 113: ......
Page 137: ...5 3 Section C Electrics 9803 6400 Section C 5 3 Issue 2 Pump Control FLOW CHART...
Page 201: ...10 7 Section C Electrics 9803 6400 Section C 10 7 Issue 1 CAPs II Diagnostic system K C...
Page 215: ...Section E Section E Hydraulics 9803 6400 Issue 2 3 2 3 2 Schematics...
Page 217: ...Section E Section E 9803 6400 Issue 2 3 3 3 3 Hydraulics Schematics...
Page 218: ...3 5 Section E Hydraulics 9803 6400 Section E 3 5 Issue 1 Schematics Shuttle Block JS200 JS240...
Page 232: ...10 1 Section E Hydraulics 9803 6400 Section E 10 1 Issue 1 Hydraulic Pump JS200 JS240...
Page 233: ...10 2 Section E Hydraulics 9803 6400 Section E 10 2 Issue 1 Hydraulic Pump JS200 JS240...
Page 234: ...10 3 Section E Hydraulics 9803 6400 Section E 10 3 Issue 1 Hydraulic Pump JS200 JS240...
Page 263: ...30 2 Section E Hydraulics 9803 6400 Section E 30 2 Issue 1 Control Valve JS200 JS240...
Page 264: ...30 3 Section E Hydraulics 9803 6400 Section E 30 3 Issue 1 Control Valve JS200 JS240...
Page 265: ...30 4 Section E Hydraulics 9803 6400 Section E 30 4 Issue 1 Control Valve JS200 JS240...
Page 266: ...30 5 Section E Hydraulics 9803 6400 Section E 30 5 Issue 1 Control Valve JS200 JS240...
Page 267: ...30 6 Section E Hydraulics 9803 6400 Section E 30 6 Issue 1 Control Valve JS200 JS240...
Page 268: ...30 7 Section E Hydraulics 9803 6400 Section E 30 7 Issue 1 Control Valve JS200 JS240...
Page 327: ...51 12 Section E Hydraulics 9803 6400 Section E 51 12 Issue 1 Solenoid Valve 8 spool...
Page 328: ...55 1 Schematic Section E Hydraulics 9803 6400 Section E 55 1 Issue 1 Shuttle Valve...
Page 330: ...55 3 Schematic Section E Hydraulics 9803 6400 Section E 55 3 Issue 1 Cushion Valves...
Page 481: ...7 15 Section F Transmission 9803 6400 Section F 7 15 Issue 2 Motor...
Page 482: ...7 16 Section F Transmission 9803 6400 Section F 7 16 Issue 1 Motor...