3
CHECKS AND MAINTENANCE
42
GB
• 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 com-
pletely, introduce the amount of new oil
described in chapter 1 page 22.
• 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 pum-
ping rod. Block the cap to the pumping
rod via the counter-nut 2.
1
2
3
1
2
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