✓ Grip the piston, rotate it until the second grub screw is visible, then unscrew it.
✓ Check for wear of the gasket and piston, replace if required.
Once operations have been completed, re-assemble the components following the above
mentioned operations in reverse order.
N.B.: The piston must be re-assembled paying careful attention to tightening both grub screws
the same amount, so that piston is coaxial with the slide.
15.3.4 - Filling the oil reservoir
Once the maintenance operations are complete and the head components reassembled, fill the oil
chamber. The following tables feature some brands and necessary quantities. For proper operation,
proceed as follows:
➢ Turn the adjusting knob clockwise to bring the piston to FDC (at
0% of stroke), for pumps with an 8 and 12 diameter piston, adjust
to 50%. This can be made easier by electrically powering the
pump.
➢ Once the operation is complete, if the pump has been electrically
powered, it must be switched off to operate safely.
➢ Fill the oil reservoir with oil until it reaches the surface where the
cap rests, give slight taps with a rubber mallet to help evacuate any
air bubbles that may have formed while filling, wait a few minutes
and then top-up to the edge, tighten delicately the cap with the key.
❑ The pump is now ready for operation and can be connected to
the plant.
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