BI620968
Hydraulic system _____________________________________________ Major hydraulic components (feeder breaker)
hydraulic oil tank
The hydraulic oil tank located on the left hand side of the machine has a 175 gallon capacity and is equipped with a oil level sight glass and thermometer.
hydrostatic pump
The hydrostatic pump located within the power unit is a axial piston, variable displacement and electronic displacement control pump that supplies hydraulic power to the conveyor.
tandem gear pump
The tandem gear pump located within the power unit supplies hydraulic power to the tram drive motors, tilt and lift cylinder circuits.
primary valve bank
The primary valve bank located on the left hand side of the machine is used to control the machines, tilt, lift, tram and power fill functions. All sections of the valve bank are spring return (self centering) except for the power fill section which is detented.
power fill pump
The power fill pump is located on the left hand side of the discharge section of the machine on top of the oil tank and is used to replenish fluid to the hydraulic tank from an external source. The pump is capable of delivering approximately 5 gallons of fluid per 30 seconds.
tilt hydraulic cylinders
The tilt hydraulic cylinders are located at the end of the crawler under the hopper on each side of the machine and are used to adjust the discharge height of the machine. Both cylinders are controlled by one section of the valve bank.
lift hydraulic cylinders
The lift hydraulic cylinders are located at the pivot point of the crawler on each side of the machine and are used to adjust the ground clearance of the machine. Each cylinder is individually controlled by separate sections of the valve bank. WARNING! The tilt and lift hydraulic cylinders have counterbalance cartridges which serve as load holding valves. Do not replace these cylinders with different style cylinders or the machine may fall. The machine could be damaged or you or other personnel could be seriously injured or killed by the falling machine.
tram motors
The tram motors are located to the inside of each crawler assembly and are used to supply power to the torque hubs for tramming operations. Each tram motor is individually controlled by separate sections of the tram valve bank.
conveyor motor
The conveyor motor is located on the left hand side of the head shaft and is a radial piston motor that receives hydraulic fluid from the hydraulic pump. The motor is controlled from the two position conveyor direction control valve.
_________________________________________________________________ DBT – Model 7MFBH-48A Feeder Breaker 5.24
© DBT AMERICA 2007
(Reference Fig. 24)
