Procedure For Movement Operation In Case Of Electrical Failure - FERRI T250A Series Use And Maintenance Manual

7.9.1 Procedure for movement operation in case of electrical failure

In the case of damage to the electrical system, you can carry out manoeuvres in manual mode in order to allow closure
of the arm in transport position and go to the nearest Authorised Service Centre.
Carry out the manoeuvres in manual mode making sure that there are no people within
the working radius of the machine.
Carry out the operating interventions in manual mode and keep on the left hand side of
the machine (external tank side).
CAUTION
Do not go in between the machine and the tractor.
Procedure for manual operation of the distributor
Carefully follow the following procedures for manual operation of the distributor:
1) Start the tractor engine;
2) Make sure the parking brake of the tractor is engaged;
3) Check that the rotor commands are disconnected;
4)
Operate the PTO of the tractor (the PTO must be regulated to 250-300 rpm in order to have a reduced flow of oil
to the distributor and to operate more safely);
5)
Leave the driving seat of the tractor and do not allow anybody else to access the cab;
6)
Remove the protective casing of the distributor in order to access the distributor;
7)
Start the movement procedure. Check that the pawls of the manual manoeuvres of the solenoid valves (EVA1-2-3
and EVB1-2-3) are fully tightened.
8) Tighten the manual manoeuvre pawl of the EVP solenoid valve: the distributor is now under pressure.
9) To carry out the manoeuvre, identify the solenoid valve that corresponds to this manoeuvre. In order to identify the
correspondence between the solenoid valves and the manoeuvres refer to the list below. Unscrew the pawl of
the solenoid valve. Carry out this operation very carefully, keeping your hand on the pawl. It is not necessary
to completely unscrew the pawl since the speed of the manoeuvre can be regulated by adjusting it (screwing it
reduces the speed, unscrewing it increases the speed). Proceed slowly with the unscrewing operation in order
to minimise risks. In order to interrupt the movement, screw the pawl of the solenoid valve in fully again. The
function remains active until the pawl is fully screwed in.
10) Follow the process described in point 9 to perform different manoeuvres.
11) Once the arm has been positioned correctly, check carefully that all the pawls of the solenoid valves EVA1-2-3 and
EVB1-2-3 have been fully and completely screwed in. The pawl of EVP solenoid valve must be fully unscrewed.
12) PAY VERY CAREFUL ATTENTION TO THE ABOVE POINT IN ORDER TO PREVENT UNCONTROLLED
MANOEUVRES.
In the event of electrical failure or while checking connections between the cable connectors and solenoid valves it
is advisable to:
1) Unscrew the connector screw;
2) Remove the connector;
3) Check that there are no oxidised parts in the contact elements;
In the event of oxidation, clean carefully or replace;
4) Use anti-oxidants for electric contacts on the solenoid valve contacts and on the connector;
5) Assemble the connector on the solenoid valve;
6) Tighten the screws without making a hole in the connector so as not to damage it;
7) Apply silicone for electric contacts on the connector screw to seal it.
Rev. 1.1
ROUTINE MAINTENANCE
T250A-T320A
107