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Piston Pump - Plunger replacement
To replace the plungers, proceed as follows:
1. Remove the two top nuts of the pressure manifold and the six front
nuts and remove the manifolds and the cylinder heads.
2. Spread grease or oil on the new sleeves and place the plunger
inside.
3. On one side, the sleeves have a groove that should be facing the
cylinder heads.
4. Couple the sleeves with the plunger in the piston.
5. Assemble the leather tensor. Tighten the tensing nut fully.
6. Stretch the leather by hand until reaching the limit and then turn
it a quarter of a turn with key (if you have torque wench, tighten
the torque to 2.5 – 3 kg pressure - approximately 30 Nm).
μ
ATTENTION! Before replacing it, be aware that the leather gives
over time in the sleeve and dripping can occur. If this happens,
tighten the leather tensor and the liquid will stop dripping.
7. Fit the cylinder heads and place the nuts without over-tightening
them.
8. Grease the joints of the six valves before reassembling them.
9. Place the pressure valves on the cylinder heads and the suction
valves on the lower chamber.
10. Fit the pressure and suction chambers, and tighten the nuts with a
torque setting of 3.5 Nm. The tightening pressure is 30 Nm (3 kg).
11. Tighten all the other nuts simultaneously until the whole unit is
tight and compact.
6 - Maintenance
41
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