IV.
OPERATING SYSTEMS
40
C. HYDRAULIC SYSTEM
HYDRAULIC PUMPS–
The hydraulic pumps
(fig. 40-1) circulate the hydraulic oil throughout the
necessary systems and back through a cooler be-
fore returning it to the reservoir.
During deteasseling operations, the gear pump
(fig. 40-2) and relief manifold (fig. 40-3) are used to
supplement the hydraulic pump in maintaining the correct operating pressure while still
allowing the oil to move through the filtration and cooling systems.
If the level in the reservoir drops too low to safely operate the machine you must
shut down the engine immediately to prevent damage to the hydraulic system.
POWER STEERING SYSTEM–
The power steering is a dedicated
circuit steering system with full time control and self centering/ double ac-
tion steering cylinders.
FIG. 40-6
FIG. 40-7
FIG. 40-5
FIG. 40-4
BASIC MACHINE
LADDER-
To raise or lower the ladder you will need to locate the BRAKE/LADDER switch at the front of
the right hand console (fig. 40-7). When the brake is applied the ladder will lower automatically (fig. 40-5). The
ladder will not raise (fig. 40-6) until the machine is running and the switch has been returned to the OFF posi-
tion.
FIG. 40-2
FIG. 40-3
FIG. 40-1
