Page 215 - CITS - Fitter Trade Practical - Volume -2

FITTER - CITS

Job Sequence

• Designing, constructing and testing circuits to actuate a single acting cylinder/double acting cylinder/hydrometer.
TASK 1 : Circuit for single acting cylinder

• Design, construct and test a circuit to actuate a single acting cylinder.
TASK 2 :Circuit for double acting cylinder in 4/2 valves
• Design, construct and test a circuit to actuate a double acting cylinder using 4/2 directional control valve.
TASK 3 : Circuit for double acting cylinder in 4/3 valves
• Design, construct and test a circuit to actuate a double acting cylinder using 4/3 directional control valve.

TASK 4 : Circuit activate hydrometer
• Design, construct and test a circuit to actuate a hydrometer using a 4/3 D.C. Valve.

TASK 1: Design, construct and test a circuit to activate a single acting cylinder.
Draw a circuit diagram to actuate a single acting cylinder in the given format and get the approval of instructor.
Include elements to actuate cylinder and also to monitor pressure at various points in the circuit.

Select the hydraulic elements as per the approved circuit diagram drawn.
Mount and connect the elements on the trainer kit.
Get the approval of your instructor before switching “ON” hydraulic pump.
Switch ON the hydraulic pump.
Inspect the circuit for any leakages. (Fig 1)

Eliminate any leakages by (Fig 2) retightening connectors pipes.
Put off hydraulic pump, while tightening connector and pipes.
Note the position of valve and position of cylinder in the table 1. (Table given along with circuit diagram)
Actuate the direction control valve and note the new position of valve and cylinder.

Note it in the table 1.
Put off hydraulic pump.
Disconnect the valves and other elements and place it in respective places.

Note : Repeat the above sequence for task 2, 3 and 4 with respective circuit diagram and table as
per instructor guidence

200

CITS : C G & M - Fitter - Exercise 90