User's Manual

30 kW S-BAND/U ANTENNA GROUP

PREVENTIVE MAINTENANCE

4.5 Rev. C

CARD 3

UNIT OPERATION PERIODICITY

Antenna Pedestal

S/U

Internal inspection and general cleaning of the

Antenna Pedestal S/U Unit

PERSONNEL REQUIRED INSTRUMENTS REQUIRED TIME

1R Set of screwdrivers, Electro Contact Cleaner, Soft

brush, Primer, Paint, Emery paper, Soft cloth

15 minutes

SAFETY PRECAUTIONS

On the electric switchboard, set to OFF the power breaker relevant to the unit and hang to it a

placard reading "WORK IN PROGRESS - DO NOT SWITCH ON"

STEP SEQUENCE OF OPERATIONS

1. By means of the open wrench, loose and remove the four nuts (Chapter 9, Figure

9.1.23 pos. 1) fixing the cover (Chapter 9, Figure 9.1.23 pos. 2) and remove the

former.

2. Check the internal state of casing and if paint has been scratched off at any point,

proceed as per Card 1

3. Check:

− the power connection cable;

− the electrical and electronic circuits and mechanical components.

Remove and replace components if and when necessary.

4. Cleaning is necessary only when layers, often dark layers, can be clearly seen on

some area. If these layers are visible, they must be removed with a dry cloth. Only if

really necessary, repeat the procedure with a cloth dampened in carbon

tetrachloride. A special brush for cleaning, of appropriate size, may also be used. If

and when necessary use an air-brush to remove dust from inside the pedestal

5. Check the Antenna position indicator components. Replace components or the unit

according to the needs

6. Check the Driving Belt tension and integrity. Replace the belt if necessary.

7. Reassemble the cover using the reverse procedure.

8. Grease the fastening nuts of the cover to avoid corrosion and facilitate future

inspections