IV.
OPERATING SYSTEMS
41
OPERATING SYSTEMS
C. HYDRAULIC SYSTEM
A. Hydraulic Pump
B. Power Steering
C. Solution Pump
D. Ladder
E. Spray Booms
The AUXILIARY HYDRAULIC SYSTEM
is a load sensing, pressure compensated system with efficiency
in mind. That means it only pumps the amount of oil needed to do the job.
The pump is mounted to the “front” of the second hydrostatic pump (fig. 4.41-1).The systems consist of a
single variable displacement pump that supplies the required hydraulics to operate the full time power steering
unit, boom control cylinders (lift, level, and fold), ladder, outer boom breakaway, and the solution pump.
The return oil from the load sense ump is mixed with the oil from the gear pump on the side of the engine.
This pump supplies a constant flow of oil from the hydraulic tank to the cooler and then back to the tank
through the filter. This is considered a kidney loop and is dedicated to the cooling and filtration of the hydraulic
system.
The hydraulic lines that connect the attachment to the machine’s hydraulic supply are equipped with a
quick coupler system. This system allows for easy removal and attaching of the booms or other attachment.
FIG. 4.41-2
B
FIG. 4.41-1
FIG. 4.41-3
C
FIG. 4.41-5
E
FIG. 4.41-4
D
A
