BI000970
________________________________________________ Hydraulic system Major hydraulic components (Reference Fig. 31) hydraulic oil tank
open loop load sense pump
piggyback gear pump
primary valve bank
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.
secondary valve bank
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.
tank fill pump
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.
frame tilt cylinders
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.
frame lift cylinders
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-
______________________________________________________________ A6474X338 SUSV/00 5.41
