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Breaker and breaker power unit assembly ....................5
hydraulic oil tank
open loop load sense pump
piggyback gear pump
primary valve bank
secondary valve bank
tank fill pump
frame tilt cylinders
frame lift cylinders Major hydraulic components
(Reference Fig. 31)
The hydraulic oil tank is located on the left hand side of the machine and has a 175 gallon capacity. The hydraulic oil temperature and level is monitored by the PLC via a temperature probe and float switch. The tank is equipped with a sight glass and thermometer.
The open loop load sense pump is a part of the conveyor power unit and is located on the left side of the machine. It supplies hydraulic fluid to all hydraulic functions on the machine.
The piggyback gear pump is bolted to the rear of the open loop load sense pump. This pump supplies hydraulic fluid to the main pump and the conveyor motor for cooling purposes and for the hydraulically driven heat exchanger.
The primary valve bank, located on the right hand side of the machine, is used to control the machine’s conveyor tilt, lift, tram, and power fill functions and to control flow to the secondary valve bank. All sections of the valve bank are spring return (self centering) except for the power fill section which is detented.
The secondary valve bank, located at the head shaft on the right hand side of the machine, is used to control tailpiece steering and tilt, the roof cylinders, the stab (foot) cylinders, and the side staker cylinder.
The tank fill pump is a flow divider that is hosed to run backwards from normal flow divider operation. The pump is located on top of the hydraulic oil tank on the left side of the machine and is used to replenish oil supply. It is capable of delivering approximately 5 gallons of fluid per 30 seconds.
The frame 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. The cylinders are controlled by one section of the primary valve bank.
The frame 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.
The machine is equipped with lock pins that should be installed when the unit is not being moved. Pin are located near the lift cyl-
tailpiece tilt cylinders
tailpiece steering cylinders
roof anchor cylinders
stabilizer foot cylinders
side staker cylinder
tram motors
conveyor motor
The tailpiece tilt cylinders are located are located on either side of the tailpiece and are used to adjust the height of the tailpiece. The cylinders are controlled by one section of the secondary valve bank.
The tailpiece steering cylinders are located on either side of the tailpiece and are used to position the tailpiece. The cylinders are controlled by one section of the secondary valve bank.
The roof anchor cylinders are mounted on the frame on either side of the receiving end of the machine. The cylinders are used to raise and lower the roof anchor arms and are controlled independently by two separate sections of the secondary valve bank.
The stabilizer foot cylinders are mounted to the under side of the frame on either side of the mid-section of the machine. The cylinders are used to raise and lower the stabilizer feet and are independently controlled by two separate sections of the secondary valve bank.
The side staker cylinder is mounted underneath the receiving section on the left side of the machine. The cylinder is controlled by a section of the secondary valve ban,.
The tram motors are located to the inside of each crawler assembly and are used to supply torque to the torque hubs for tramming operations. Each tram motor is individually controlled by separate sections of the primary valve bank.
The conveyor motor is located on the left hand side of the machine, and is mounted directly to the conveyor reducer. This radial piston motor receives hydraulic fluid from the main valve bank’s first and second sections.
The pressure filter is located on the right hand side of the machine at the secondary operator’s station. This filter is used to filter fluid on the pressure side of the hydraulic circuit and is monitored by the PLC system. When the filter reaches 60% capacity, a “PRESSURE LINE DIRTY FILTER” message will display on the PLC display at the primary operator’s station.
The return filter is located on the right hand side of the machine at the secondary operator’s station. This filter is used to filter fluid on the return side of the hydraulic circuit and as the power fill filter. The filter is monitored by the PLC system; a “RETURN LINE DIRTY FILTER” message will display on the PLC display at the primary operator’s station when the filter reaches 60% capacity..
The hydraulic oil water filter is located on the left hand side of the machine and is mounted to the hydraulic oil tank. It is used to filter water out of the hydraulic oil. The filter is monitored by the PLC system; a “HYDRAULIC OIL WATER REMOVAL DIRTY FILTER” message will display on the PLC display at the primary operator’s station when the filter reaches 60% capacity.
The function pressure gauge is located at the primary operator’s station on the right side of the machine. This single gauge will display the system pressure for the active function.
