CRRC MS-JY111-L Руководство по эксплуатации - Страница 6

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2. Principle of
Operation
1
Hydraulic pump aggregate
2
Directional valve
3
Unloading valve
4
Overflow valve
5
Pressure transmitter
6
Installation tool
When the tool trigger is depressed, motor runs, DT1 is powered on, and the left
contact of four-way solenoid closed, then the hydraulic unit start PULL circle. When
PULL pressure reaches to a pre-set value, the DT1 is shut down, and the right contact of
four-way solenoid closed, then the hydraulic unit start RETURN circle. When PUSH
pressure reaches a pre-set value, the motor shut down, and DT2 is powered on for 1s, the
pressure is released. See below for the action of solenoid valve.
7
Solenoid valve
8
Pressure relay
9
Pressure-limiting valve
10
Two-way solenoid valve
11
Strainer
Fig. 3 Principle Diagram