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Hệ thống thủy lực xe nâng hàng

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Hệ thống thủy lực máy xúc cat 966h

... CHECK VALVE LOAD CHECK OPERATION To Signal Duplication Valve From Signal Duplication Valve From Head End of Cylinder From Resolver Network To Rod End of Cylinder Tilt Antidrift Valve Load Check ... COMPENSATOR AND LOAD CHECK VALVE HOLD To Signal Duplication Valve From Signal Duplication Valve From Head End of Cylinder From Resolver Network To Rod End of Cylinder Load Check Spool Pressure ... Spool Check Valve Balance Valve Pilot Pressure Reducing Valve Resolver Valve Ride Control Lower / Float Pilot Solenoid Valve Dump Pilot Solenoid Valve Choke Check Valve Min Angle Tank Auxiliary Head...

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Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P1

Danh mục: Cơ khí - Chế tạo máy

... is sent to the upper face of the valve and directed into the leak off passage in the injector body The leak off fuel then passes through the gallery in the head to the return to the fuel tank ... To lock the pump, loosen the locking pin (5) and slide the washer (6) so that the shoulder of the locking pin fits through the larger hole in the washer Tighten the locking pin to the proper ... signals the Engine ECM when there is water present in the separator bowl The Engine ECM monitors the number output circuit of the sensor When this circuit is open the ECM will illuminate the action...

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Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P2

Danh mục: Cơ khí - Chế tạo máy

... training OBJECTIVES After learning the information in this presentation, the technician will be able to: identify all major components and explain the operation of the 320D-336D hydraulic excavators, ... cover the introduction, operator's compartment, engines, pilot hydraulic system, main control valve group, swing system, travel system, and tool control systems This training package may be used ... the principles of machine systems operation, diagnostic equipment, and procedures for testing and adjusting CONTENT This training package provides service training presentation coverage of the...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P3

Danh mục: Cơ khí - Chế tạo máy

... the automatic mode, pushing these switches changes the preset temperature LCD panel (4): The panel displays the settings of the HVAC system Fan switch (5): The fan switch directly controls the ... During the fourth quarter of 2008, the 325D became the 300D and the 330D became the 336D for most machine configurations The 325D MH and 330D MH did not change The 325D FM and 330D FM did not change ... 2008, the 325D and 330D nomenclature changed to the 329D and 336D respectively The reason for the change was to better align the machine nomenclature with the actual machine weight Making this change...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P4

Danh mục: Cơ khí - Chế tạo máy

... equal to the spring forces above the spool When the joystick is released, the joystick will return to the NEUTRAL position due to the force of the return spring moving the spool up When this action ... harshness when releasing the travel pedal When the travel lever/pedal is moved suddenly from the NEUTRAL position, the rod is pushed downward The rod moves the dampening piston downward The hydraulic ... displacement change valves shift, the motors will destroke for higher speed Check Valve: The pilot manifold also has a check valve The check valve maintains pilot accumulator pressure in the pilot...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P11

Danh mục: Cơ khí - Chế tạo máy

... order to turn the Heavy Lift Mode ON or OFF When the Heavy Lift Mode is turned ON, the indicator will illuminate and the Machine ECM will energize the heavy lift solenoid When the "Heavy Lift Mode ... to change the selected work tool When the desired work tool is highlighted in the monitor display press the "OK" button on the monitor to select the work tool shown Work lights switch (5): The ... turned to the ON position The AEC can be set in the first stage and the second stage by alternately pressing the switch - The First Stage Mode of the AEC will lower the speed setting of the engine...

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Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P5

Danh mục: Cơ khí - Chế tạo máy

... of the solenoid increases As the magnetic force of the solenoid becomes greater than the force of the spring, the spool moves down against the force of the spring The downward movement of the ... against the force of the NFC spring on the right When the NFC control piston moves left the piston contacts the shoulder on the pilot piston, which causes the pilot piston to move the horsepower ... As the pump upstrokes, the movement of the actuator causes the control linkage to move the sleeve around the horsepower control spool The sleeve moves to the right as the actuator moves to the...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P6

Danh mục: Cơ khí - Chế tạo máy

... only the higher pressure from the idler or the drive pump flows to the main relief valve The check valves also ensure that flow from the highest supply pressure circuit does not enter the other ... to the main relief valve pressure setting are made by changing the spring force of the upper spring Heavy Lift increases the maximum system pressure When the Heavy Lift is activated, the Heavy ... 14 The above illustration shows the pilot operated main relief valve equipped with the heavy lift solenoid At lower system pressures the poppet is held against the the seat by the force of the...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P7

Danh mục: Cơ khí - Chế tạo máy

... and the supply oil to the head end of the stick cylinder is higher than the return oil from the rod end, the check valve will close No return oil from the rod end enters the passage to the head ... to the check valve If the boom rod end pressure is lower than the boom head end oil pressure, then the check valve opens allowing boom head end oil to be directed to the boom rod end The check ... the pilot pressure on the spool, the greater the movement of the spool, and the greater the flow from the boom cylinder head end to the tank past the boom control valve The check valve remains closed...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P8

Danh mục: Cơ khí - Chế tạo máy

... into the dampening chamber below the valve As the pressure is relieved on the left side of the motor, the relief valve closes and the motor stops When the motor stops, the higher pressure on the ... further reduces the pressure on the left side of the motor Once the anti-reaction valve on the left opens, and the passage on the right side of the motor is connected to the passage on the left ... since the pressure from the left side of the motor is still higher than the pressure being sensed from the right side of the motor through the center of the valve, the ball seats and prevents the...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P9

Danh mục: Cơ khí - Chế tạo máy

... the supply oil enters the motor and unseats the brake pilot check valve The oil then flows to the brake piston As pressure builds in the brake piston, the piston moves to the left against the ... one of the check valves and flows past the check valve to the motor Return oil from the motor flows around the counterbalance valve, to the travel control valve, and back to the tank The check valve ... the supply oil enters the motor and unseats the brake pilot check valve The oil then flows to the brake piston As pressure builds in the brake piston, the piston moves to the left against the...

Hệ thống thủy lực máy đào CATERPILLAR SERIE D - P10

Danh mục: Cơ khí - Chế tạo máy

... increased If the temperatures are low, the fan speed is decreased The higher the ambient temperature, the higher the fan speed, as well For high temperature readings the Machine ECM sends the minimum ... NOTES Nomenclature Change: During the fourth quarter of 2008, the 325D and 330D nomenclature changed The 325D became the 329D and the 330D became the 336D for most arrangements The exceptions are ... through the software The fan speed is also higher than the maximum fan speed normally controlled by the software The makeup valve in the fan motor is used to prevent cavitation when flow from the fan...