3
CHECKS AND MAINTENANCE
42
USA
•
Loosen the counter-nut
2
and remove cap
1
.
•
Extract the spring
3
and overturn the pipe,
making the oil escape.
•
Move the pumping unit and drain the
remaining oil. When the oil has been
drained completely, introduce the amount
of new oil described in chapter 1.
•
Bleed the pumping unit of air, making it
rise and fall until complete loading.
Introduce the spring and screw the cap
1
until it is completely inserted on the pump-
ing rod. Block the cap to the pumping
rod via the counter-nut
2
.
1
2
3
1
2
