Skytron ELITE 6002, Руководство по обслуживанию

Страница: 10 / 62

Page 2
1-2. Component Operation
a. Motor/Pump Operation
The motor/pump assembly is a gear type pump
that provides the oil pressure and volume for the
entire hydraulic system. The pump has an inlet
side and an outlet side. The inlet side is connected
to the reservoir which provides the oil supply. The
reservoir has a very fine mesh screen strainer
which prevents foreign material from entering the
oil system.
The output line of the pump is connected to the main
oil galley which is internal and common to all the
hydraulic mini-valves and pressure relief valve.
Also, common to the hydraulic mini-valves and
pressure relief valve is an oil galley that internally
connects to the oil reservoir to provide a return path
for the hydraulic oil. See figure 1-2.
b. Pressure Relief Valve
Figure 1-4 . Pressure Relief Valve
Functioning
Figure 1-3. Pressure Relief Valve Not
Functioning
This device provides an alternate oil path when the
hydraulic cylinders reach the end of their stroke
and the pump continues to run. If this path were not
provided, the pump motor would stall because the
oil cannot be compressed. The pressure relief
valve is directly connected to the mini-valve bodies
and shares both the common internal main pres-
sure oil galley, and the return oil galley, that inter-
nally connect to the reservoir. See figure 1-3.
Figure 1-2.
The main component of the valve is an adjustable
spring loaded plunger that is pushed off from its
seat by the oil pressure. The oil then flows back into
the reservoir. See figure 1-4 Turning the adjust-
ment nut clockwise increases the amount of oil
pressure required to open the valve, and turning it
counterclockwise decreases the amount of oil pres-
sure. (See adjustment section for specification.)
PRESSURE RELIEF
ADJUSTMENT NUT
SPRING LOADED
PLUNGER
PRESSURE
GAUGE
PRESSURE RELIEF
ADJUSTMENT NUT
SPRING LOADED
PLUNGER
PRESSURE
GAUGE