REPAIR OF HYDRAULIC SYSTEM
steering cylinder has a hydraulic working pressure of
1500 psi and the steering control valve working pres-
a. The hydraulic system utilized on the carrier con-
sure is 650 psi.
sists of four pumps, fluid reservoir, relief valves, con-
b. Repair of hydraulic components not included in
trol valves, cylinders, filters, and necessary connect-
this chapter are described and illustrated in the
ing tubes and fittings. Hydraulic pressure is used to
specific repair chapter in which the components are
operate the utility blade, outriggers, and steering
power assist. The outrigger system has a hydraulic
working pressure of 1850 psi plus or minus 25 psi. The
Section II. REPAIR OF OUTRIGGERS AND FRONT
AXLE LOCK-OUT PUMP
draulic pump as follows.
(1) Tag, disconnect all hydraulic lines to the
The hydraulic pump used to supply pressure to the out-
riggers and axle lock-out system is a single pump
(2) Remove screws (1), lock washers (2) and lift
mounted on the rear of the carrier engine.
pump from carrier engine assembly.
20-3. Removal and Disassembly
a. Removal Refer to figure 20-1 and remove the hy-