DOSEURO
®
XMPE0TMB125SST014
9/12
1st Edition - 2014
Piston disassembly and re-assembly
The piston is blocked on the slide by means of two dowels, one visible in the upper part and the other
hidden in the lower part.
Proceed as follows to disassemble the piston:
After having disassembled the head and checked the oil chamber.
Remove the covering protections.
Loosen the screws inside the lantern blocking the oil chamber.
Remove the oil chamber.
Remove the gasket ring from the piston
Loosen the visible dowel.
Hold the piston and turn it until the second dowel is visible, then loosen it.
Check for wear of the gasket and piston, replace if required.
Once the operations are complete, carry out the disassembly operations in reverse order to
reassemble the components.
N.B.: The piston must be reassembled taking care to tighten the two dowels with the same force
so that the piston is coaxial with the slide.
FILLING OF OIL CHAMBER
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 10 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 chamber up to the cap support plane, hammer gently
with a rubber mallet to facilitate the evacuation of air bubbles
formed during filling, wait a few minutes and top-up to the brim.
Delicately fasten the cap with the wrench.
3.4
3.5
CLOCKWISE
rotation
KNOB
ATTENTION!
HEAD
COMPOSITION
Rotation of
piston
Loosening of dowels
blocking piston
