CYLINDER AS 1948229 - Caterpillar

Illustration 1 g01330676
(1) Swing motor
(2) Left travel motor
(3) Right travel motor
(4) Bucket cylinder
(5) Stick cylinder
(6) Travel brake valve (left)
(7) Travel brake valve (right)
(8) Boom cylinder
(9) Swivel
(10) Pilot control valve (travel)
(11) Pressure switch
(12) Pressure switch
(13) Stick drift reduction valve
(14) Main control valve
(15) Boom drift reduction valve
(16) Pilot control valve (stick and swing)
(17) Pilot control valve (bucket and boom)
(18) Main relief valve
(19) Pressure switch
(20) Slow return check valve
(21) Bypass check valve
(22) Oil cooler
(23) Reducing valve (boom priority mode)
(24) Pilot oil manifold
(25) Travel speed solenoid valve
(26) Swing brake solenoid valve
(27) Valve
(28) Solenoid valve (hydraulic lockout)
(29) Accumulator
(30) Reducing valve (boom priority mode or swing priority mode)
(31) Gear pump (fan motor)
(32) Relief valve (fan pump)
(33) Pilot pump
(34) Drive pump
(35) Idler pump
(36) Pressure sensor (drive pump)
(37) Proportional reducing valve (power shift pressure)
(38) Pressure sensor (idler pump)
(39) Fan motor (hydraulic oil cooler)
(40) Return filter
(41) Hydraulic tank
(42) Drain filter
(43) Pilot relief valve
(44) Pilot filter
(45) Heavy lift solenoid valve Swing Motor without Fine Swing
Illustration 2 g01659675
(1) Swing motor
(14) Main control valve
(31) Gear pump (fan motor)
(33) Pilot pump
(34) Drive pump
(35) Idler pump
(41) Hydraulic tank Hydraulic Pump Flow and Pressure Control System
Illustration 3 g01330660
Pump compartment
(34) Drive pump
(35) Idler pump
(37) Proportional reducing valve (power shift pressure)
(46) Delivery line (drive pump)
(47) Delivery line (idler pump) This machine is driven and controlled by the following systems.
The main hydraulic system controls the cylinders, the travel motors and the swing motor.
The pilot hydraulic system supplies oil to the main pumps, the main control valve, the swing brake and the travel motors.
The electronic control system controls the outputs of the engine and pump.
The hydraulic oil cooling system provides oil to the fan motor in order to cool the hydraulic oil.The main hydraulic system delivers oil flow from idler pump (35) and drive pump (34) in order to control the following components: bucket cylinder (4), stick cylinder (5), boom cylinders (8), right travel motor (3), left travel motor (2) and swing motor (1).
Illustration 4 g01331528
Main control valve
(18) Main relief valve
(48) Right control valve body
(49) Left control valve body Idler pump (35) and drive pump (34) are variable displacement piston pumps. The performance of both pumps is equal.Drive pump (34) is directly connected to the engine by a flexible coupling. The drive pump delivers oil to the right control valve body (48) of the main control valve. Idler pump (35) is mechanically connected to the drive pump through gears. The idler pump delivers oil to the left control valve body (49) of the main control valve. Pilot pump (33) is a gear pump that supplies oil to the pilot hydraulic system. Pilot pump (33) is mechanically connected to idler pump (35) through gears. Gear pump (31) supplies oil to the oil cooling system. Gear pump (31) is mechanically connected to the engine through gears. All engine output is used to drive these four pumps.As the load pressure increases during working conditions, the main pumps increase the delivery pressure and the pumps decrease the flow rate. The hydraulic horsepower remains constant even though the delivery pressure and the flow rates change. The